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    25 January 2026, Volume 42 Issue 01
    Previous Issue   
    Research Progress of Magnesite Flotation Collector and Enhanced Separation Technology
    LIANG Xiaodan ZHAO Tonglin MA Fangyuan LIU Shuyong
    2026, 42(01):  1-7. 
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    In order to efficiently develop and utilize magnesite resources，aiming at the problems of close symbiosis of impurity minerals，small crystal structure difference，low low-temperature separation ef⁃ ficiency and strict environmental protection requirements in the beneficiation process，the research on mag⁃ nesite flotation collector and enhanced separation technology is systematically carried out.The mechanism and application effects of positive flotation（fatty acids，modified phosphates），reverse flotation（anionic， cationic）and new combined collectors are reviewed. The core advantages of combined collectors in improv⁃ ing low temperature adaptability and selectivity through synergistic adsorption effect are clarified.The tech⁃ nical breakthroughs in desilication and decalcification，improvement of concentrate grade and recovery rate by strengthening technologies of step-by-step flotation，ultrasonic pretreatment，microbial pretreat⁃ ment and magnetic flotation combination are analyzed.It is concluded that the current collectors have some problems，such as insufficient selectivity，poor industrialization adaptability of some technologies，and en⁃ vironmental protection performance to be improved.In the future，researchers should focus on the research and development of targeted environmental friendly collectors，the exploration of adsorption mechanism at the molecular level and the construction of multi-field coupling separation system，so as to provide theoret⁃ ical support and technical reference for the efficient and green development and utilization of magnesite re⁃ sources.
    Research Progress of Coal Gasification Slag Carbon Ash Separation and Its Filling Polymer Materials
    CAO Xiaolu TAN Jinlong, LIU Guangxing LING Xiangyang MOU Chengqian
    2026, 42(01):  8-15. 
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    In order to cope with the low comprehensive utilization rate of coal gasification slag (CGS) and the environmental and carbon emission pressure caused by landfill，a systematic review is carried out on the current situation that the key problems such as high encapsulation and low activity of carbon ash in CGS hinder its effective recovery and utilization.The research focuses on the physical and chemical proper⁃ ties and microstructure analysis of CGS，as well as the combing and evaluation of the current carbon ash separation technology and modification process，aiming to explore its application potential as a“carbon-sil⁃ icon”dual-source material in the field of polymer fillers.By modifying the activated carbon residue compo⁃ nent，CGS can partially or completely replace similar fillers such as carbon black to realize its high-value application in polymer materials.It is proposed that by constructing route for integration of“quality-modifi⁃ cation-high value”，the separation and modification process can be effectively integrated，and the coal gas⁃ ification slag is expected to be included in the category of environmentally friendly polymer material fill⁃ ers，promoting the transformation of coal gasification slag from end treatment to green functional materials.
    Comparison and Enlightenment of Green Mine Standards Based on International Perspective
    WU Pan ZHAO Guoyan LI Yang
    2026, 42(01):  16-21. 
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    In order to comprehensively promote the improvement of green mine construction system and further improve the scientificity and international comparability of green mine standards，aiming at the problems of late start of green mine standard research in China and insufficient international comparative research，the similarities and differences of green mine related concepts are systematically sorted out，and the green mine standard documents of major mining developed countries are selected. From the macro back⁃ ground，model characteristics and evaluation system，a comprehensive and structured comparative analy⁃ sis of green mine standards in various countries is carried out.The results show that the green mine stan⁃ dards of Canada and Australia are obviously advanced in terms of policy coordination，community partici⁃ pation and evaluation indicators. The distribution of indicators focuses on renewable energy utilization and life cycle carbon emission management.Based on the comparison results，some suggestions are put forward for the optimization of China's green mine standards. The first is to build a multi-level standard structure system，the second is to further promote the quantification of ecological effectiveness evaluation，the third is to establish a mining area benefit sharing mechanism to promote the coordinated development of mining areas，the fourth is to promote Chinese standards to international standards and enhance the international recognition and influence of standards.
    Research Progress on Soil Improvement in Purple Sandstone Mining Area
    LUO Lihua QIAN Xinghe ZHANG Chunhong CAI Ying SU Youbo ZHANG Youguo ZHANG Caizhuo HE Tianhang HU Bozhi LI Qiang
    2026, 42(01):  22-28. 
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    In order to improve the soil quality of purple sandstone mining area，promote the restora⁃ tion of ecological function and realize the sustainable utilization of land，the compound degradation prob⁃ lems of soil in this area，such as intensified acidification，high content of conglomerate debris，structural deterioration，imbalance of nutrient cycle and potential pollution of heavy metals caused by parent material characteristics and mining disturbance，are systematically reviewed. The mechanism and research progress of soil degradation and improvement technology in purple sandstone mining area are emphatically ana⁃ lyzed，and the application effect of technology integration is evaluated with typical cases.It is found that the current research focusing on the soil of purple sandstone mining area still has shortcomings in technical precision adaptability，long-term stability monitoring and intelligent management. In the future，it is nec⁃ essary to strengthen the long-term positioning test and mechanism research，promote the integration of in⁃ telligent technology，and expand the green and low-cost improvement path.
    Study on Comprehensive Recovery Technology of Solid Waste from Copper-Cobalt Ore Resources in Congo (DRC)
    LIN Rongyue KONG Lingqaing FU Chenxiao
    2026, 42(01):  29-33，48. 
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    In order to promote the sustainable development of copper-cobalt ore resources in Congo (DRC) and the resource utilization of mining solid waste，aiming at the problems of large output of mining solid waste，high environmental risk，insufficient recovery of valuable metals and unclear adaptability of ores with different oxidation rates to resource utilization technology in this area，the geological occurrence characteristics，mining status and solid waste generation mechanism，physical and chemical properties and environmental risks of the local copper-cobalt ore belt are systematically reviewed.The diversified mining， mineral processing and smelting process paths based on ore oxidation rate are analyzed. The research prog⁃ ress and application examples of solid waste recycling technologies such as heap leaching，bioleaching， synergistic leaching and slag beneficiation are sorted out，and the frontier directions of biotechnology，cir⁃ cular economy and intelligent management are discussed.The research results show that through technology integration and policy guidance，the efficient recovery of copper and cobalt in solid waste (the leaching rate of heap leaching copper is more than 80%，and the recovery rate of synergistic leaching copper is more than 85%) and the bulk consumption of solid waste can be realized，and the green low-carbon transformation of mining industry can be promoted.The oxidation rate of ore is the key factor to determine the characteristics of solid waste and the choice of resource technology path. The combined process of beneficiation and metal⁃ lurgy can effectively improve the recovery efficiency of valuable metals from refractory smelting slag. Circu⁃ lar economy and intelligent technology can provide an important direction for the large-scale promotion of comprehensive utilization of solid waste.
    Construction and Analysis of the Relationship Network of Mine Numerical Intelligence Research in China Based on Literature Data
    YANG Zhihe,
    2026, 42(01):  34-43. 
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    In order to systematically reveal the development law and evolution characteristics of mine numerical intelligence research in China，aiming at the problem that the knowledge structure in this field is not clear，the multi-dimensional relationship network construction and analysis of 4 892 literatures in CNKI database are carried out by using the methods of bibliometrics and social network analysis. It is found that since 2016，the research on mine mathematical intelligence in China has shown an exponential growth trend，and has formed an academic cooperation network of 27 high-frequency authors with Wang Guofa，Mao Shanjun and Ding Enjie as the core. The research hotspots focus on the three theme domains of digital mine，intelligent mine and intelligent mine，showing significant interdisciplinary integration char⁃ acteristics. China University of Mining and Technology，Liaoning Technical University and other institu⁃ tions constitute the core hub of industry-university-research collaborative innovation. In the future，the re⁃ search field of mine digital intelligence in China will show the trend of deep integration of new generation information technology，equal emphasis on green security，deepening of industry-university-research col⁃ laborative innovation，and expanding application of unmanned adaptive intelligent technology. At the same time，artificial intelligence and digital twin，5G and unmanned driving system integration，space-air�ground integrated perception system will become an important development direction. The research results provide a scientific basis for grasping the frontier dynamics and technological evolution path of mine numer⁃ical intelligence.
    Research on Load Monitoring and Intelligent Control System of Semi-autogenous Mill in Zhongguan Iron Mine Based on Multi-sensor Fusion
    ZHANG Yikun, REN Jianhui, WANG Zheng, LI Yanke, BO Yuliang, LIAN Huanchao,
    2026, 42(01):  44-48. 
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    In order to realize intelligent feeding and precise operation of semi-autogenous grinding process，improve equipment operation efficiency and reduce production cost，a real-time monitoring and intelligent control method based on multi-source fusion of vibration，acoustic and current signals is pro⁃ posed to solve the problems of insufficient accuracy of single sensor，poor adaptability of working condi⁃ tions and control lag in mill load monitoring.The key features are extracted by time domain analysis (RMS， kurtosis，margin factor) and frequency domain analysis (center of gravity frequency，frequency band ener⁃ gy ratio). The harmonic dynamic compensation mechanism and feature dynamic weighted fusion model are innovatively introduced，and the high-precision estimation of filling rate (error <3%) is realized by combin⁃ ing the dual-channel deep learning architecture.The industrial application results show that the system re⁃ sponse delay is less than 100 ms，and the power consumption per ton of ore is reduced by 12.4%. It effec⁃ tively solves the monitoring and control problems of traditional methods under complex working conditions， and provides a complete solution for the intelligentization of the mill.
    Research and Application of Three-dimensional Visualization Control System for the Whole Pro⁃ cess of Mineral Processing
    CHEN Rongxiang JIN Kai DENG Chunhua PANG Yuli HAN Feng
    2026, 42(01):  49-52，71. 
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    In order to solve the problems of unclear material flow and poor information in the actual production of the concentrator，the integration of the virtual visualization factory of mineral processing and the production information management platform is studied，and the three-dimensional visualization man⁃ agement and control system software and mobile APP for the whole process of mineral processing are devel⁃ oped to assist the management of mineral processing production.Through multiple functional modules such as reagent management，scheduling management，equipment management，production report，alarm infor⁃ mation，problem filling，inspection management，remote monitoring，and production statistics，the intelli⁃ gent real-time analysis and management of the actual execution data in the production process are realized. It optimizes the working index，improves the production efficiency of mineral processing，greatly improves the work efficiency of management personnel，and provides accurate data support for the intelligent control of mineral processing.
    Analysis of Stability of Overlying Filling Body on the Column Based on FLAC3D
    2026, 42(01):  53-57，65. 
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    Based on the actual background of the filling mining project in Datang section of Wengfu Phosphate Mine，focusing on the stability control of the overlying filling body in the stope，the technical idea of ensuring the stability of the filling body and the safe recovery of the pillar by leaving the top pillar （ore body）is put forward. Combined with the actual geological conditions of the mine，four groups of dif⁃ ferentiated mining schemes are designed，and 0，1，2，3 m top pillars are set up respectively. From the three core dimensions of displacement field evolution，stress field distribution and plastic zone develop⁃ ment，the stability characteristics of the overlying filling body under each scheme are systematically com⁃ pared and analyzed. The results show that when it is mining with 0 m top pillar，there are significant dis⁃ placement deformation and strong stress concentration in the overlying filling body of the goaf，and the plastic zone is easy to penetrate，which seriously threatens the stability of the filling body. After retaining the top column，the displacement deformation，stress concentration and plastic zone development range of the filling body are significantly improved，and the improvement effect gradually increases with the in⁃ crease of the thickness of the top column. Among them，the scheme of leaving 2 m top pillar has the best performance，which can not only maintain the integrity of goaf morphology and effectively inhibit the insta⁃ bility and failure of filling body，but also take into account the high ore recovery rate and achieve the engi⁃ neering goal of safe and efficient recovery of pillar. This study provides a direct engineering basis for the op⁃ timization of top pillar parameters in filling mining method of similar phosphate mines，and has important practical guiding significance for improving mining safety and resource utilization efficiency.
    Reliability Evaluation of Coal Mine Electromechanical System Based on IFAHP-Extension Theory
    TANG Zhongfu
    2026, 42(01):  58-65. 
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    In view of the lack of relevant evaluation methods for the reliability of coal mine electrome⁃ chanical system in the process of deep mining in coal mines，13 influencing factors were selected from the perspectives of human，machine and environment，and the feedback relationship between each factor and the reliability of coal mine electromechanical system is clarified. The reliability evaluation system is con⁃ structed. Based on the extension theory，the calculation method of objective correlation degree of reliability evaluation index of coal mine electromechanical system is given. Based on the improved fuzzy analytic hier⁃ archy process，the subjective weight calculation method of each index is given. Finally，a reliability evalu⁃ ation method of coal mine electromechanical system based on improved fuzzy analytic hierarchy process�extension theory is proposed. The results show that the improved fuzzy analytic hierarchy process and the evaluation method of extension theory，from the subjective and objective point of view of comprehensive evaluation，the effect is more realistic. The main factors affecting the reliability of coal mine electrome⁃ chanical system are the execution rate of maintenance cycle，the response time of emergency plan，the overall rated residual life grade of equipment and the average material performance qualification rate. The reliability of coal mine electromechanical system can be greatly improved by improving the relevant indica⁃ tors. Finally the reliability evaluation grade of the electromechanical system of the coal mine is obtained by field application，which proves that the method has high feasibility，and the targeted improvement mea⁃ sures have a guiding role in improving the reliability of the electromechanical system of the coal mine，and improve the comprehensive benefits of the enterprise.
    Application of Construction Technology and Key Support Techniques for Large-section Machine Head Chambers
    LI Guilin
    2026, 42(01):  66-71. 
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    The coal body stability at the construction section of the 11703 transportation track head chamber of the No. 7 Coal Mine of Dananhu is poor，and the roadway layout is complex. To address the technical challenges such as high construction difficulty，low efficiency and difficult control of surrounding rock when using traditional tunnel boring machines，through technical research，the construction process of the machine head system roadway was optimized. The close-range coal seam tunneling process of going up the mountain through layers was adopted. Meanwhile，a combined support of "C steel shed + side an⁃ chor cable + advanced grouting" was proposed for the going up the mountain through layers section. For the section passing through the roadway，a combined support process of "artificial false roof + U29-type steel shed" was proposed，and for the bottom-raising area of the coal leakage hole，a combined support process of "steel mesh + channel steel beam + spray" was adopted. Through field application，compared with the head system roadway of the 11701 transport track head chamber，the construction period of the 11703 transport track head chamber after process optimization was shortened by 14 d，and the tunneling project cost was reduced by 897 000 yuan. Monitoring of the surrounding rock in the through-layer and road-pass⁃ ing sections revealed that after the implementation of combined support，no large-scale deformation or con⁃ traction occurred in the surrounding rock. The maximum subsidence of the roof in the through-layer section was 0.12 m，the maximum contraction on both sides was about 0.25 m，the maximum subsidence of the roof in the road-passing belt roadway section was about 0.16 m，and the maximum subsidence of the roof in the road-passing return air roadway section was about 0.14 m，all are within the allowable range. Com⁃ bined support has achieved remarkable application results.
    Ore Drawing Test of Non-pillar Sublevel Caving Method under Different Cut-off Grades in an Iron Mine in Western Panzhihua
    YAO Qiuping DONG Qiuping PENG Shouxing CHEN Shulin YANG Chengye LI Jielin
    2026, 42(01):  72-76. 
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    In order to grasp the influence of different cut-off grades on ore dilution rate and loss rate in sublevel caving mining without sill pillar，based on the stope structure parameters of an iron mine in western Panzhihua，a similar physical model of ore drawing is established，and similar simulation tests of ore drawing under different cut-off grades of 20 % and 23 % are carried out. The results show that the flow characteristics of ore rock are basically the same under the two cut-off grade conditions，and the residual ore bodies in the ridge of each segment are obviously present，which will be gradually released in the next segment. When the cut-off grade of ore drawing is increased from 20% to 23%，the ore recovery rate， waste rock mixing rate and ore dilution rate are reduced to varying degrees，and the reduction ranges are 7.94，1.77 and 1.12 perecentage points，respectively，while the recovery grade is increased by 0.44 pere⁃ centage points. Finally，it is recommended that the mine adopt 23% cut-off grade for ore drawing. The ex⁃ perimental results provide a basis for determining the reasonable cut-off grade of ore drawing in mines us⁃ ing sublevel caving method.
    Research on U-shaped Steel Arch Support Technology in Water-rich and Easily Expansive Deformation Surrounding Rock
    WANG Tao ZHENG Chengying HU Wei,
    2026, 42(01):  77-80，94. 
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    Aiming at the problem of strong ground pressure in roadway caused by the poor stability of ore rock in an iron mine in Huaibei City，Anhui Province，in order to ensure the long-term stability of roadway and the safe production of mine，it is urgent to study efficient and reliable support control technol⁃ ogy. Based on the analysis of the limitations of traditional bolt-mesh-shotcreting and steel frame support under complex ground pressure conditions，the elliptical U-shaped steel arch support technology is intro⁃ duced for the roadway in the serious ground pressure section of the central mining area. With the closed ring characteristics，the supporting structure can uniformly bear the pressure of the roof and the two sides， and realize the effective constraint of the surrounding rock deformation. The engineering practice and long�term deformation observation show that after using this technology，there is no obvious instability phenome⁃ non such as floor heave and side wall bulging in the roadway，the stability is significantly improved，and the roof control effect achieves the expected goal. The research proves that the elliptical U-shaped steel arch support technology can efficiently adapt to the strong ground pressure conditions under the broken sur⁃ rounding rock，successfully solve the complex ground pressure roadway support problem，and provide a reliable technical reference for the roadway support of mines with similar geological conditions.
    Application of Geophysical Prospecting Technology in the Survey of Goaf in an Iron Mine
    LIN Min YU Liuping, ZUO Taotao HE Xueheng,
    2026, 42(01):  81-88，94. 
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    In the early stage of an underground iron mine，the non-pillar sublevel caving method is used to form a goaf，and the full tailings cemented filling technology is used for subsequent treatment. In order to find out the actual distribution of goaf and the effect of filling treatment，ensure the safety of mine production and meet the requirements of hidden disaster-causing census in mines，two geophysical pros⁃ pecting techniques of controlled source audio magnetotelluric method (CSAMT) and natural source surface wave method (micro-motion) are used to carry out special detection work in goaf. A total of 10 detection lines are set up. The results show that there are still 9 goaf affected areas in the mine，of which 3 areas are not fully filled，and the total volume of the unfilled goaf is about 424 700 m3 . The results of geophysical ex⁃ ploration accurately reveal the spatial distribution characteristics of goaf and filling defects，provide reli⁃ able technical guidance for the next targeted treatment of goaf，and have important practical significance for improving the level of mine safety management and control.
    Research on Grouting Reinforcement and Active Support Technology of Roadway with Extremely Broken Roof
    LI Jibao DING Gang MA Qiufeng ZHAO Shanliang LIU Guolei CHEN Taiyong
    2026, 42(01):  89-94. 
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    Under the condition of extremely broken roof，the active support of roadway often faces problems such as anchorage failure，large deformation of roadway and roof caving. When the passive sup⁃ port of shed type is adopted，there are phenomena such as uneven stress between unit support and roof， complex moving frame and easy local caving during mining. Taking the material roadway of 220101 work⁃ ing face in Xinji No.2 Mine as the research object，through theoretical analysis，numerical simulation and field experiment，it is revealed that the traditional shed support has problems such as uneven transmission of support force and failure of advance support，and the system is optimized. The roadway support system under the condition of extremely broken roof is proposed，and the combined active support technology of “grouting reinforcement + bolt + grouting anchor cable”is proposed. Through the grouting reinforcement of the roof with inorganic double-liquid quick-setting material to strengthen the integrity of the roof，com⁃ bined with the roof bolt and hollow grouting anchor cable，a cooperative bearing structure can be formed. Through theoretical calculation and numerical simulation，it is verified that the support design scheme meets the requirements of mining support. The field application results show that the roof subsidence is re⁃ duced by 16.9%，the tunneling rate of the roadway is improved，and the cost of roadway support and man⁃ agement is reduced by 14.3%. This technology realizes the large deformation control and roof management of the mining roadway in the working face，and provides a theoretical basis and engineering demonstration for roadway support under similar geological conditions.
    Research on Accurate Detection of Abandoned Metal Casing for Coalbed Methane Drainage in Sihe Coal Mine
    LI Xiaohui HUO Fuxing LI Hai XING kai
    2026, 42(01):  95-100，109. 
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    In order to break through the limitations of the existing abandoned metal casing detection technology for coalbed methane drainage in Sihe Coal Mine，realize the accurate detection of the metal cas⁃ ing position reduce the construction time and greatly improve the tunneling efficiency，according to the re⁃ quirements of field detection，two kinds of equipment，magnetic instrument and manhole cover detector， are selected to construct the detection model of coal body on the well，and a metal casing detection method combining far and near is innovatively proposed. By integrating a high-precision magnetic instrument and an electromagnetic induction manhole cover detector，a far-near field cooperative detection mode is con⁃ structed，which effectively overcomes the limitations of a single detection method. The research results show that this method can accurately locate the position of the metal casing of the abandoned coalbed meth⁃ ane drainage，and accurately determine the spatial position and distribution of the casing，so as to initially realize the safe excavation and mining within the effective detection range. Compared with the traditional method，the detection efficiency of this technology is increased by at least 50 times，the construction peri⁃ od is significantly shortened，the construction cost is greatly reduced，and the production efficiency and economic benefits of the enterprise are effectively improved.
    Application of Medium-deep Hole Precracking Blasting Technique before Crossing Fault in Fully-mechanized Mining Face of Liyazhuang Coal Mine
    SONG Xiaojie
    2026, 42(01):  101-105，109. 
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    To address the issue that shallow-hole blasting technology fails to effectively precrack the deep rock mass and has poor precracking effect on the rock mass in the sealed hole section when there is a hard fault in the fully mechanized mining face，resulting in slow advancement speed of the fully mecha⁃ nized mining face and high wear of the shearer's cutting teeth，this study takes the F19 fault in the 2-801 fully mechanized mining face of Liyazhuang Coal Mine as the research background. By means of theoretical analysis，on-site investigation and measured analysis，the principles of blasting technology，hole depth， hole diameter，spacing between blast holes and charge parameters were studied and analyzed to investigate the influence of different hole depths on the effect of precracking blasting. It is determined to adopt a com⁃ bined approach of medium-deep hole blasting technology and deep hole blasting technology. By using deep hole blasting to precrack the rock mass within a large area of the deep part of the fault，and then conduct⁃ ing medium-deep hole blasting on the rock mass at the deep hole blasting hole blocking section，the shal⁃ low rock mass can be loosening，allowing the rock mass fractures at the fault layer to develop throughout the range. With the assistance of a coal shearer in cutting the rock，the fully mechanized mining face can efficiently pass through the fault zone. The results show that through two blasting operations，the medium�deep hole precracking technology greatly reduces the strength of the rock mass，making it easier for the shearer to cut the rock mass. Through recorded observations，the average daily advancement speed of the fully mechanized mining face when passing through faults has increased by 48%，and the average wear of the shearer's cutting teeth has decreased by 51%. By medium-deep holes precracking blasting technology，
    the strength of hard fault rock masses can be effectively reduced，production costs can be saved，and pro⁃
    duction efficiency can be improved.
    Reform Practice of Bulk Material Conveying System in an Iron Mine
    LI Yanke, ZHANG Yikun, ZHANG Yukang, LIU Cong, BO Yuliang, HU Yaxiong,
    2026, 42(01):  106-109. 
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    After the ores mined underground in Zhongguan Iron Mine ore broken into a certain block by the crushing station，they are lifted to the surface skip bin through the hoist，and then transported to the grinding bin through 6 conveyor belts. There are many conveyor faults in the transportation process， which affects the production efficiency. In order to reduce the maintenance frequency of the buffer roller in the feeding and transportation system，the buffer roller is replaced by a buffer bed to improve its impact re⁃ sistance. The buffer device is added at the bottom of the ore chute to replace the chute buffer lining plate， so as to improve the maintenance efficiency and reduce the impact force on the surface of the conveyor belt. The conveyor belt with higher impact resistance is replaced to improve the service life of the conveyor belt. Through a series of technical transformation and optimization adjustment，the transportation capacity of the feeding system exceeds the design capacity，the equipment start-up rate is increased by 20%. The service life of the conveyor belt is improved，and the transportation cost of the feeding system is reduced. At the same time，the material accumulation at the bottom of the conveyor belt is also effectively controlled， which reduces the work intensity of the workers. It can provide reference for mine optimization using con⁃ veyor belt to transport large materials.
    Process Test of Comprehensive Recovery of Tungsten from Copper-sulfur Tailings of Dabaoshan Concentrator in Guangdong
    HUANG Chunfu WANG Long, HU Wenying ZHONG Guojian QI Zhongxu, YANG Hao,
    2026, 42(01):  110-115，119. 
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    In order to efficiently recover fine-grained low-grade tungsten resources from copper�sulfur tailings of Dabaoshan Concentrator in Guangdong，a comparative study of three different processes of direct flotation，full gravity separation and gravity-flotation combination is carried out in view of the technical problems in tungsten recovery.The results show that the tungsten concentrate with WO3 grade of 16.80% and WO3 recovery of 56.00% can be obtained by the traditional full flotation process. Tungsten concentrate with WO3 grade of 44.10% and WO3 recovery of 24.20% can be obtained by full gravity sepa⁃ ration process. Using the combined new process of gravity pre-concentration and tailings flotation，the ex⁃ cellent indexes of WO3 grade of tungsten concentrate of 25.17% and WO3 recovery of 55.85% are ob⁃ tained while the flotation treatment capacity is significantly reduced，and the cost of reagents is greatly reduced，which provides a feasible reference for the efficient recovery of tungsten resources in similar tailings.
    Investigation and Analysis of Roller Mill Process in Baixiangshan Concentrator
    CHANG Luping WANG Ronglin YANG Songfu LI Mingjun WANGYafeng WANG Tao
    2026, 42(01):  116-119. 
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    Baixiangshan concentrator reforms the second-stage grinding，and changes the ball mill of the second-stage grinding equipment into a tower mill to improve the grinding index and stabilize the quality of iron concentrate.In order to analyze and compare the effect of the transformation，the beneficia⁃ tion process of the roller mill + grinding and beneficiation system in Baixiangshan Concentrator is investi⁃ gated before and after the transformation，and the operating conditions of each operation and each process are comprehensively analyzed and evaluated.The results show that it is reasonable to replace the ball mill with the tower mill in the second stage grinding. After the transformation，the processing capacity of the plant is 327.57 t/h，the iron concentrate grade of the production index is 64.82%，and the iron recovery rate is 80.35%，which achieves the expected effect of technical transformation.
    Quality Control Practice of Chemical Inspection and Analysis Work in Open-pit Metal Mines
    LI Yonghua CHEN Xuyan DING Ke PAN Zuying
    2026, 42(01):  120-124，129. 
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    In order to ensure the efficient utilization and quality control of mineral resources in open�pit metal mines，the core issues such as the construction of quality control system，the control of key links and the application of standard samples in chemical inspection and analysis are systematically studied.The basic content and management function of chemical inspection and analysis are summarized. The frame⁃ work and implementation path of quality control system are analyzed. The influencing factors and control measures of the key links of inspection and analysis are emphatically discussed. The selection and prepara⁃ tion of standard samples and their role in improving the accuracy of results are deeply studied. At the same time，the effectiveness of existing control measures is verified by typical mine practice cases，and the ef⁃ fectiveness data of existing quality control measures in practical application are obtained.The practice re⁃ sults show that the chemical inspection and analysis work of open-pit metal mines needs to improve the lev⁃ el of inspection and analysis by optimizing the quality control system and strengthening the control of key links. The development direction of quality control of chemical inspection and analysis in the future is put forward，which can provide theoretical support and practical guidance for other mines.
    Process Test of Synergistic Flotation of a Copper Sulfide Ore by Mercaptobenzothiazole Sodium
    SHI Xuejin MAO Jiachao WEI Peijie ZHU Yuanbin WU Shiyuan YANG Hongming LIU Guangyi
    2026, 42(01):  125-129. 
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    In order to solve the technical problem of low copper recovery efficiency in the flotation process of complex high-sulfur copper-zinc ore，a high-sulfur copper-zinc ore in Yunnan is taken as the research object，and the synergistic flotation comparison test of ammonium butyl aerofloat，mercaptobenzo⁃ thiazole sodium（MBT-Na）and its composite system is systematically carried out. The synergistic effect and flotation performance under different collector ratios are discussed.The experimental results show that when the mass ratio of MBT-Na to ammonium butyl aerofloat is 2.5，the composite system exhibits the best synergistic collection effect.On this basis，zinc sulfate，lime and water glass are used as inhibitors，2# oil is used as foaming agent，and the closed-circuit process of one roughing，three cleaning and three scav⁃ enging is adopted. Finally，the excellent indexes of copper concentrate grade of 32.54% and copper recov⁃ ery of 95.24% are obtained，and the efficient recovery of copper in the high-sulfur copper-zinc ore is real⁃ ized.It provides theoretical basis and process guidance for the efficient flotation of complex high-sulfur cop⁃ per-zinc ore and the optimization of collector system，and is of great significance to promote the efficient utilization of polymetallic ore resources and the development of green beneficiation technology.
    Beneficiation Process Test of a Lead-Zinc Mine in Sichuan
    ZHANG Guolin HE Xiang ZHANG Guoxiang GU Xinxing
    2026, 42(01):  130-133，138. 
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    A lead-zinc mine in Sichuan contains 5.24% lead，0.63% zinc and 30.23 g/t associated silver，which belongs to a typical lead-zinc-silver polymetallic sulfide ore.In order to realize the efficient utilization of the mineral resources，aiming at the problems of many kinds of raw ore minerals，complex dissemination relationship，significant difference in lead and zinc content，and difficult separation of lead and zinc，the ore process mineralogy and beneficiation test are carried out.The test results show that using lime + sodium sulfide as a combined regulator，D301+25# ammonium butyl aerofloat as a composite collec⁃ tor，through the process of one roughing，three cleaning and two scavenging，the lead concentrate with lead grade of 59.13%，zinc content of 2.49%，lead recovery rate of 94.05%，associated silver grade of 267.40 g/t，silver recovery rate of 73.68% can be obtained，and the efficient recovery of lead and associat⁃ ed silver is realized.
    Experiment on Reducing Magnesium Oxide Content in a Copper-nickel Sulfide Concentrate
    FENG Bo, LI Fuxiang LI Yang LI Jie WU Weiwei WANG Jiangfei ZHANG Jianying ZHANG Yongzhu
    2026, 42(01):  134-138. 
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    In order to solve the technical problem that the high content of magnesium oxide in the concentrate affects the subsequent smelting process and the grade of metal recovery in a copper-nickel sul⁃ fide ore，aiming at the problem that it is difficult to separate the magnesium silicate gangue minerals such as serpentine and talc in the concentrate，the beneficiation process test of reducing the grade of magnesium oxide in the concentrate is carried out.The test results show that the flotation process of one roughing，two cleaning and three scavenging，combined with the application of CD-C inhibitor，can effectively inhibit the magnesium-bearing gangue minerals such as serpentine and talc in the concentrate. The content of magnesium oxide in the concentrate is reduced from 12.14% to 5.27%，and satisfactory test indexes are ob⁃ tained. It has important reference significance for similar copper-nickel sulfide ore to reduce magnesium�bearing gangue minerals.
    Beneficiation Process Test on a Copper-Lead-Zinc Polymetallic Ore in Huili，Sichuan
    LAN Huanran DONG Juan FANG Xiaolin SU Gang
    2026, 42(01):  139-144. 
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    In order to effectively strengthen the efficient comprehensive utilization of mineral resourc⁃ es and solve the technical problem of difficult separation of symbiotic valuable minerals copper，lead and zinc in polymetallic ore，the copper-lead-zinc sequential preferential flotation process is studied for a cop⁃ per-lead-zinc polymetallic ore in Huili，Sichuan.Through systematic process mineralogy research and flo⁃ tation condition test，the sequential preferential flotation technical route of zinc inhibition and lead flota⁃ tion copper，zinc inhibition and lead flotation，and final zinc flotation is established.The test results show that under the optimal test conditions，the copper concentrate with copper grade of 24.15% and copper re⁃ covery of 45.46%，the lead concentrate with lead grade of 65.92% and lead recovery of 57.02%，and the zinc concentrate with zinc grade of 57.98% and zinc recovery of 78.01% are obtained in the closed-circuit test. It provides technical direction and practical basis for the clean and efficient comprehensive utilization of complex polymetallic ore，and is of great significance to improve the economic benefits and resource guarantee ability of the mine.
    Process Test of Flotation Copper from Waste Refractory of Blowing Furnace in Heilongjiang Zijin Copper Industry
    HUANG Chaomin
    2026, 42(01):  145-149. 
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    In order to deal with the waste refractory materials produced by the annual repair of the blowing furnace in the concentrator of Heilongjiang Zijin Copper Co.，Ltd.，the laboratory test and field test of separating waste refractory materials by flotation are carried out，and the process optimization is car⁃ ried out according to the field test results.The experimental results show that the copper in waste refractory can be effectively separated by using hydrocyclone and common flotation equipment without other gravity separation equipment. In actual production，the excellent indexes of copper concentrate grade of 24.49% and copper recovery rate of 89.56% are obtained.After the initial production，the process improvement test is carried out. After the improvement process，an excellent index of concentrate copper grade of 26.57% and copper recovery of 91.62% is obtained.
    Study on Process Mineralogy of Copper Ore from a Concentrator in Yunnan
    LI Jianling GONG Xuedong YANG Hongyan WANG Guobin
    2026, 42(01):  150-153，159. 
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    In order to improve the flotation index of a concentrator，in view of the problem that the on�site copper recovery rate and copper concentrate grade are 92.66% and 17.83%，respectively，the inspection indicators copper recovery rate and copper concentrate grade are 92.32% and 17.80%，respectively，the two indexes are equivalent and lower than the design indexes of copper recovery rate（93.33%）and copper con⁃ centrate grade（18.25%），the process mineralogy of the ore is systematically studied.The results show that the copper grade of the ore sample is 0.42%，the oxidation rate of copper minerals is 3.57%，and the copper oxide part is difficult to recover in the flotation process，which affects the copper recovery rate.The average particle size of copper minerals is 28.39 μm，and the micro-fine particles（-9.6 + 4.8 μm）and ultra-fine particles（-4.8 μm）in copper minerals are relatively high，which is not conducive to recovery.The dissocia⁃ tion degree of copper mineral monomer is low，and the proportion of poor intergrowth（0～20%）is relatively high，which is not conducive to recovery. In the future，scientific research can be carried out according to the above situation to improve the comprehensive recovery and flotation index of copper.
    Study on Process Mineralogy of a Low-grade Phosphate Ores in Leibo，Sichuan
    ZHANG Wei TANG Binbin FENG Zhenhua LI Cheng JIANG Wenjie TANG Yang
    2026, 42(01):  154-159. 
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    In order to efficiently utilize a low-grade refractory phosphate ore in Leibo，Sichuan，the chemical composition，mineral composition，mineral dissemination characteristics and particle size，mono⁃ mer dissociation and intergrowth characteristics of the phosphate ore are systematically studied by means of chemical analysis，rock mineral identification，X-ray diffractometer（XRD）and mineral automatic analyz⁃ er（MLA）.The results show that the phosphate ore belongs to low grade and high silicon magnesium sili⁃ ceous phosphate ore. The main mineral is apatite（collophanite），followed by quartz and dolomite，con⁃ taining a small amount of calcite，muscovite，pyrite. Apatite and dolomite are finely disseminated and closely associated with quartz.The results of process mineralogy and exploratory test show that high-quality phosphate concentrate products can be obtained by increasing the grinding fineness to improve the dissocia⁃ tion degree of minerals，and then pre-discarding the tailings by X-ray light separation，combined with flo⁃ tation process to remove magnesium（dolomite）and reduce silicon（quartz）.
    Experiment on Flotation Recovery of Copper and Sulfur from Magnetic Separation Tailings of Chengchao Iron Mine
    TANG Qizhou LI Yubiao, LIU Shu ZHAO Jialong, WANG Zhonghong,
    2026, 42(01):  160-164. 
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    In order to improve the recovery rate and concentrate grade of copper and sulfur in mag⁃ netic separation tailings of Chengchao Iron Mine，a systematic flotation process test is carried out to solve the problems of fine particle dispersion，poor floatability and easy slime of copper and sulfur in magnetic separation tailings.The test results show that the optimum reagent system is determined by the condition test as follows: the dosage of ethyl xanthate in mixed flotation is 90 g/t，the dosage of foaming agent 2# oil is 18 g/t.Lime is used to adjust the pH value of pulp in copper roughing，and the dosage of lime is 2 800 g/t. Activated carbon is used to remove the reagent from copper rough concentrate products in copper cleaning. The dosage of activated carbon is 45 g/t，and the dosage of Z-200 is 4 g/t.In the final closed-circuit test， copper concentrate with copper grade of 17.37% and copper recovery rate of 76.26% is obtained，and sul⁃ fur concentrate with sulfur grade of 46.70% and sulfur recovery rate of 86.23% is obtained. The recovery efficiency and concentrate grade of copper and sulfur in magnetic separation tailings are significantly im⁃ proved，which provides a feasible process scheme and theoretical basis for the resource utilization of Chengchao iron ore tailings.
    Experiment on Preparation of Modified Ecological Restoration Soil by a Phosphate Tailings
    LIU Weiqiang ZHANG Jianglong LE Chengtao
    2026, 42(01):  165-168. 
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    In order to solve the problem of resource waste and environmental pollution caused by phosphorus tailings storage，the experimental study on the modification and preparation of ecological resto⁃ ration soil by phosphorus tailings is carried out by referring to the three-stage filtration modification tech⁃ nology of phosphogypsum and adopting the two-stage filtration + pressure filtration dehydration process.The test results show that the three-stage filtration adopts the pressure filtration mode. Under the conditions of flocculant PAM dosage of 10 g/t，filter cake thickness of 6 mm and phosphate tailings slurry concentration of 50%，the water content of the prepared modified ecological restoration soil is 12.355%，which reaches the storage condition of water content less than 15%，and the dry base capacity is 630 kg/(m2 ·h)，which re⁃ alizes the high-value utilization of phosphate tailings.
    Analysis of High and Steep Slopes in an Open-pit Quarry of a Granite Mine for Construction Purposes
    WANG Erxi LI Shangfu LI Jinxiang HONG Dunmin WANG Jing
    2026, 42(01):  169-176，203. 
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    In view of high and steep slopes in an open-pit quarry of a certain construction granite mine，a comprehensive analysis of the engineering geological characteristics and specific mining condi⁃ tions of the slopes was conducted. Typical slope sections in each zone were selected. The potential failure modes of the slopes were analyzed by using the red-flat projection method，and the stability of the slopes under groundwater and rainfall conditions was preliminarily analyzed by numerical simulation. Combining the limit equilibrium method and the finite element strength reduction method（SRM）in the Midas/GTS software，a systematic evaluation of slope stability under different working conditions is conducted，and corresponding management measures and suggestions are proposed. The research results show that the pos⁃ sibility of overall large-scale wedge-shaped failure of the slope is relatively small，and the main failure modes are two types: arc integral sliding and small wedge-shaped failure modes. After rainfall，rainwater seeped into the slope，and the infiltration line increased. During the rainy season，the rise of the slope in⁃ filtration line will affect the stability of the slope. The current slope of the mine is in a stable state. Shear failure is prone to occur at the lower part of the weathered rock strata and the foot of the deep mining slope. The simulation results of the limit equilibrium method and the finite intensity reduction method are consis⁃ tent，indicating the validity and rationality of the multi-method comprehensive analysis. The research re⁃ sults provide a basis for the formulation of slope stability protection measures and suggestions for this open�pit mining site.
    Study on Progressive Damage Mechanism of Sandstone Based on Experiment and Numerical Simulation
    WANG Li YANG Daoxue
    2026, 42(01):  177-181. 
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    In the process of underground resource exploitation，frequent mining disturbance will lead to significant unloading damage effect of surrounding rock. In order to study the progressive damage charac⁃ teristics and fracture mechanism of surrounding rock under cyclic loading and unloading，the progressive damage of sandstone under cyclic loading and unloading is studied by means of acoustic emission monitor⁃ ing and numerical simulation. The progressive damage evolution law and fracture mode of sandstone under cyclic loading are revealed，which laid a theoretical foundation for the stability evaluation of surrounding rock under cyclic loading and unloading. The results show that during the cyclic loading and unloading pro⁃ cess of sandstone specimens，the main frequency of acoustic emission signals shows obvious stratification. With the increase of the number of cycles，the low-frequency acoustic emission signals of 100~200 kHz gradually increase. Before cyclic loading failure，the average frequency centroid fractal dimension of the acoustic emission signal before the failure of the sandstone specimen is reduced to the minimum value. Un⁃ der the action of cyclic loading and unloading，the failure mode of sandstone specimens is mainly shear fracture，accompanied by dispersed tensile fracture. The stress concentration phenomenon occurs at the main shear crack，which causes the internal crack to develop along the main displacement direction，and is affected by the cross action of the derived crack and the shear crack，forming a cross failure mode domi⁃ nated by shear failure. The research results can provide a theoretical support for the support design of sur⁃ rounding rock under frequent mining disturbance.
    Geological Characteristics and Genesis Analysis of Maohedong Limestone Deposit for Fluxing Agent
    WEI Xiaozhao
    2026, 42(01):  182-187. 
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    Maohedong Flux Limestone Mine is located in Wanggao Town，Pinggui District，Hezhou City，which is a large-scale black metallurgical flux limestone deposit. In order to study the geological char⁃ acteristics and genesis of the deposit，detailed geological exploration work is carried out on the deposit. By analyzing the metallogenic geological conditions of the deposit，the geological characteristics of the ore body and the characteristics of the sedimentary environment，a total of one flux limestone ore body is circled in the mining area. The ore body is a single ore layer with a large scale. The CaO grade of the beneficial compo⁃ nent of the ore is 53.35 % ~ 55.53 %. The distribution is uniform and the quality is stable，which meets the requirements of limestone for non-ferrous metallurgical flux. The ore body occurs in the first member of the Upper Devonian Rongxian Formation and the Guilin Formation. The lithology are mainly dark gray bioclastic limestone，banded limestone，gray microcrystalline limestone，and light gray marbleized limestone. It is a sedimentary deposit of carbonate rock formation in a shallow sea restricted-open platform. It is formed in the Variscan metallogenic period and belongs to a biochemical sedimentary deposit.
    Ore Mineral Characteristics and Genesis Analysis of a Copper Deposit in Dongchuan，Yunnan
    YANG Jichun
    2026, 42(01):  188-192. 
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    A copper deposit in Dongchuan，Yunnan is a typical sedimentary-metamorphic reformed copper deposit in the Dongchuan ore concentration area of central Yunnan. The mineralized bodies are lay⁃ ered and stratoid. Its mineral characteristics and metallogenic regularity have important guiding signifi⁃ cance for the mining design of the deposit. Based on the systematic collection of previous geological explo⁃ ration data，combined with field geological survey，drilling core sampling and microscopic thin section identification，the characteristics of ore minerals and mineralization are studied. The results show that the ore-bearing lithology of the deposit is carbonaceous siliceous slate and silty slate in the second member of Dayingpan Formation. Metal minerals are mainly pyrite（36.32%）and chalcopyrite（10.46%）. Gangue minerals are mainly quartz（52.88%）. Chalcopyrite is mostly associated with pyrite and quartz. The ore is dominated by fine-grained metamorphic structure and metasomatic residual structure，and the structure presents the characteristics of patchy，disseminated and scattered. The deposit has undergone three stages of mineralization which are sedimentary diagenesis（mineralization），hydrothermal transformation and su⁃ pergene oxidation. The early sedimentary ore bodies are enriched by weathering and denudation and tecton⁃ ic activities. Later，the structure-metamorphic hydrothermal fluid drives the formation of veinlet ore bodies along the bedding or fissure filling. Malachite and chalcopyrite are direct prospecting indicators for finding similar ore bodies.
    Analysis on the Causes and Comprehensive Utilization of Horse-stone in Tongziwa Mining Area of Heyuan
    CHEN Pengxian
    2026, 42(01):  193-197，208. 
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    The Tongziwa mining area in Heyuan，Guangdong Province is a large-scale metamorphic feldspar quartz sandstone mine for construction. There are many layered-like horse-stones in the ore body， which are mostly interbedded with metamorphic feldspar quartz sandstone，and the water saturated com⁃ pressive strength is low. Through various analysis，it is clear that the genesis of horse-stone is closely relat⁃ ed to lithology，rock fracture development and metamorphism. In order to improve the utilization rate of re⁃ sources and promote the innovation of mining technology，a systematic physical and chemical analysis test is carried out on the horse-stone in the mining area. The results show that the horse-stone is aluminum su⁃ persaturated neutral rock，the alkali aggregate reaction test value is 0.24% ( >0.10% )，K2O + Na2O con⁃ tent is 5.83% ( >5% )，which does not meet the quality requirements of building stone and brick clay. How⁃ ever，the average saturated compressive strength is 72.72 MPa，the firmness is 1%，and the crushing in⁃ dex is 10%，which all meet the quality and technical requirements of ordinary road subgrade and construc⁃ tion site backfilling. The research results provide technical support for the resource utilization of horse�stone inclusions in mining areas and help to improve the comprehensive utilization level of resources.
    Geological Characteristics and Metallogenic Model of Kamoya Copper Deposit in Katanga Province，Congo (DRC)
    LIU Luquan LIU Jian LI Zaizao
    2026, 42(01):  198-203. 
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    The Kamoya copper deposit is located in the northwestern part of the Zambia-Congo （DRC）copper belt. It is located in the mid-west of the Katanga arc copper-cobalt metallogenic belt. The northwest-trending structure turns to the nearly east-west direction，and is adjacent to the large-scale lay⁃ ered copper-cobalt deposits such as Musonoi and Kamoto. The ore-forming geological conditions are supe⁃ rior. On the basis of systematically analyzing the metallogenic geological background and geological charac⁃ teristics of the deposit，the genetic mechanism is discussed in depth，and the targeted metallogenic model is constructed. The study shows that the Neoproterozoic Luo'an Group is the core ore-bearing horizon of the deposit，which is composed of coastal-shallow-deep-sea clastic sedimentary rocks and carbonate rocks，among which the dolomite of the mine subgroup（R2）of the Katanga Supergroup is the main ore�bearing lithology. The Kamoya copper deposit and the Kambvo copper-cobalt deposit are located in the Ka⁃ moya-Kambvo nappe structure，which is cut by the structure to form multiple independent ore-bearing rhombic blocks. The sulfide minerals in the ore are mainly chalcopyrite，chalcocite，cobalt sulfide and bornite. Malachite，covellite and other oxidized minerals are developed on the surface-near surface and be⁃ side the fault. According to the law of mineralization enrichment and the characteristics of ore mineral as⁃ semblages，the metallogenic process is divided into four stages of initial metallogenic period，early diage⁃netic main metallogenic period，late hydrothermal transformation period and supergene enrichment period. In summary，the formation of the deposit is strictly controlled by both strata and structure. It is a typical sedimentary-hydrothermal reformed copper deposit in the Katanga copper-cobalt polymetallic metallogenic belt. The research results can provide theoretical reference for the exploration of similar deposits in the re⁃ gion.
    Geological Characteristics and Genesis Analysis of Wencang Copper Deposit in Changning， Yunnan Province
    PENG Xingyu WANG Rui ZHOU Yu
    2026, 42(01):  204-208. 
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    The Wencang copper deposit is located in the central and southern part of the Lancang River fault in the Sanjiang orogenic belt. The region has undergone multiple tectonic movements. The com⁃ plex geological tectonic environment and rich provenance provide favorable conditions for mineralization. It is a typical copper deposit produced on the west side of the Lancang River fault.By systematically studying the core contents of regional metallogenic background and geological characteristics of the deposit，the for⁃ mation mechanism of the deposit is preliminarily clarified and its genetic type is determined.The research shows that the main body of Wencang Copper Mine is located on the west side of the Lancang River fault， which is controlled by the Dashitou fault and the Kejie fault.The ore body occurs in the F3 fault fracture zone in the metamorphic rock of the lower section of the Pingzhang formation (C1pn1 ) of the lower Carbonif⁃ erous system，which is strictly constrained by the distribution law of the NW-trending secondary fault frac⁃ ture zone.The ore body is vein-like with good grade and thickness stability. The ore develops a semi-auto⁃ morphic-allotriomorphic irregular granular structure，and the structural types are mainly disseminated and veinlet disseminated.In summary，it is determined that the genetic type of the deposit is a medium-low temperature hydrothermal fissure filling metasomatic copper deposit.The research results provide an impor⁃ tant geological basis for the prospecting and exploration of similar copper deposits in the region.
    Intelligent Segmentation and Quantitative Characterization of Mineral Particles Based on SAM Image Large Model
    LIN Quanwei SUN Tao, LIU Yue WU Kaixing,
    2026, 42(01):  209-219. 
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    The geometric morphology and distribution characteristics of mineral particles are of great significance for understanding the genesis of rocks and the evolution process of deposits. Traditional miner⁃ al labeling methods rely on manual operation，which is time-consuming and susceptible to subjective er⁃ rors，and it is difficult to meet the needs of batch，efficient and accurate analysis. In order to solve this problem，this paper takes the granite of Maoping deposit in Jiangxi Province as the research object，and proposes a mineral morphology research framework combining image large model and fractal analysis. The Segment Anything Model（SAM）image large model is used to segment the mineral microscopic image effi⁃ciently and intelligently，and the single fractal and multifractal analysis of the segmented mineral particles is carried out. The morphological characteristics of minerals are quantitatively characterized by box dimen⁃ sion（Db ），perimeter-area dimension（DPA），information dimension（D1 ），correlation dimension（D2 ） and multifractal parameters. The results show that compared with manual labeling，SAM intelligent seg⁃ mentation significantly improves the labeling efficiency while achieving high accuracy. Through single frac⁃ tal analysis，the morphology and distribution characteristics of granite mineral particles are revealed from multiple angles. The Db of quartz is significantly lower than that of other minerals，indicating that its parti⁃ cle distribution is more uniform and its morphology is more regular. The DPA of mica is significantly higher than that of other minerals，reflecting that its particle boundary is complex and irregular. The multifractal analysis further reveals the inhomogeneity and complexity of mineral distribution. The average values of D1 and D2 of quartz are significantly higher than those of other minerals，indicating that its spatial distribution has strong self-similarity. The multifractal spectrum width ∆α of plagioclase is the largest，indicating that the heterogeneity of its probability distribution is higher than that of other minerals. In addition，Δf（α） characterizes the dominant characteristics of mineral particles at different scales in the multifractal struc⁃ ture. The results show that the Δ（f α）values of most minerals are positive，indicating that medium-coarse particles dominate the fractal structure. Finally，in the DPA-Db coordinate diagram，each mineral showed a significant distribution pattern according to the morphological characteristics，and achieved effective classi⁃ fication and identification. The framework based on image large model and fractal analysis shows certain ac⁃ curacy and efficiency in characterizing the morphology and distribution pattern of mineral particles，which provides important support for the study of mineral morphology and genetic process.
    Research on Comprehensive Technology of Underground Mobile Video and Intelligent Analysis in a Gold Mine
    QIU Jungang CHEN Xuehui QIU xinyi LIU Mingzhou ZHANG Guangfeng WU Zhiguang YAN Yongjiang
    2026, 42(01):  220-223，228. 
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    Driven by the iteration of informatization and intelligent technology，video surveillance has become more and more widely used in the supervision of underground operations in gold mines. Howev⁃ er，the existing underground mobile video lines are vulnerable to damage and high maintenance costs. There are blind spots in the mobile operation of trackless equipment，and the lack of timeliness of mobile video analysis. In view of the above problems，Jiaojia Gold Mine puts forward a targeted technical scheme， uses new OFDM technology to solve the problem of maintenance of operation head-on monitoring line，car⁃ ries out real-time analysis of trackless operation vehicle loading video，and constructs an intelligent early warning system for mine risk. The application results show that the new OFDM technology significantly re⁃ duces the cost and difficulty of monitoring line operation and maintenance，the intelligent risk early warn⁃ ing module of trackless vehicle effectively reduces the incidence of safety accidents and equipment mainte⁃ nance costs，and the intelligent early warning system of mine risk realizes the rapid and efficient manage⁃ ment and control of underground safety. The research finally realizes the intelligent monitoring of under⁃ ground production environment in the whole region，significantly improves the level of mine safety manage⁃ ment and emergency response ability，provides practical reference for the digital transformation of gold mines，and has significant social and economic benefits.
    Industrial Application Comparison of Ceramic Ball and Steel Ball Medium in Two-stage Grinding
    DENG Xiulan ZOU Zongbin ZHANG Hao HU Huangmao FANG Tianran CHEN Fei
    2026, 42(01):  224-228. 
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    In order to reduce the grinding cost，the industrial application of ceramic ball and steel ball medium in the two-stage mill of Heshangqiao concentrator is compared. Under the conditions of ore feeding amounts of 350 t/h and 380 t/h respectively，two series of parallel sampling tests are carried out at the same time. Among them，first series of two-stage mills are grinded by steel balls，and second series of two-stage mills are grinded by steel balls + ceramic balls.The results show that when the feed rate is 350 t/h，the indexes of the two series of two-stage grinding and classification are close. when the feed rate is 380 t/h，the process parameters of first series of two-stage grinding and classification are significantly better than those of the second series，indicating that the grinding effect of steel balls is better than that of steel balls + ceramic balls when the processing capacity is high.As the processing capacity and concen⁃ trate grade of the second series are not affected，the effect of energy saving and consumption reduction is remarkable. Finally，the application of steel ball + ceramic ball is extended to first series. The two series of two-stage mills are grinding with steel ball + ceramic ball. It is estimated that the annual power con⁃ sumption cost can be saved by about 11.12 million yuan and the ball consumption cost can be saved by about 2 million yuan.
    Analysis on the Current Situation of Self-monitoring of Wastewater Discharged from Mineral Processing in an Enterprise
    WANG Yujie SHANG Yilin
    2026, 42(01):  229-232，237. 
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    In order to grasp the emission law and standard stability of the main pollutants in the wastewater discharged of mineral processing from a certain enterprise，and provide a scientific basis for the accurate pollution control of the sewage enterprises and the supervision of the ecological environment de⁃ partment according to the evidence，aiming at the problems of large amount of wastewater and complex com⁃ position in the iron ore mining and dressing industry，the monitoring data of the mineral processing circu⁃ lating water discharge of a certain enterprise in 2022—2024 are analyzed，focusing on the evaluation of the emission law of COD，ammonia nitrogen，total phosphorus and total nitrogen and the sensory character⁃ istics of water quality.The results show that the average emission concentrations of COD，ammonia nitrogen and total phosphorus during the monitoring period can meet the requirements of the current emission stan⁃ dards，but there is an intermittent concentration peak of COD index，the highest concentration is 59 mg/L， and its emission stability needs to be strengthened. The emission concentration range of total nitrogen is 0.38～15.00 mg/L，and the overall concentration level is high. The number of samples close to the emis⁃ sion limit accounts for 19.44% of the total samples，and there is a large risk of exceeding the standard.Fur⁃ ther analysis shows that the discharged wastewater shows significant low carbon-nitrogen ratio characteris⁃ tics，and the proportion of samples with C/N value less than 5 is as high as 58.33%. This water quality characteristic seriously restricts the efficiency of traditional biological nitrogen removal process.In addi⁃tion，the wastewater has long been reddish brown and turbid，indicating the presence of a large number of suspended particles.Based on the above results，although some indexes of the discharged wastewater from the enterprise meet the standards，the risk of total nitrogen exceeding the standard is prominent and the po⁃ tential of biological nitrogen removal is limited. It is urgent to carry out accurate traceability of total nitro⁃ gen in wastewater and systematically evaluate the biodegradability of wastewater，so as to provide a solid theoretical basis and data support for the directional optimization of wastewater treatment process and the long-term stable discharge of pollutants.
    Study on Identification of Dangerous Characteristics of Zinc Hypoxide Rotary Kiln Slag in a Factory in Shaoguan，Guangdong
    LI Fa, SONG Jia ZENG Yinhua GONG Weibin DENG Nie
    2026, 42(01):  233-237. 
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    In order to improve the efficiency of environmental management of solid waste in the pro⁃ cess of resource utilization，aiming at the problem that the kiln slag produced in the process of resource uti⁃ lization of zinc-containing soot in a factory in Shaoguan，Guangdong Province cannot be accurately man⁃ aged，the risk characteristics of the solid waste kiln slag derived from the volatilization of zinc hypoxide ro⁃ tary kiln are analyzed. By analyzing the main components of raw and auxiliary materials，process flow and production links，the theoretical analysis and dangerous characteristic test of possible dangerous character⁃ istics are carried out.The results show that the kiln slag produced by the reasonable compatibility of zinc�containing ash with other raw and auxiliary materials does not have the risk characteristics of corrosion， flammability，reactivity，leaching toxicity，toxic substances and acute toxicity. It is not a hazardous waste and can be managed according to general solid waste.
    Analysis of Manganese Metabolism Genes of Rhodotorula Strain in Acid Mine Drainage
    ZHANG Xian'ang HE Xiao WANG Shaoping
    2026, 42(01):  238-242. 
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    In order to analyze the molecular mechanism of efficient manganese removal by acid-resis⁃ tant Rhodotorula MF4 in acid mine drainage，aiming at the problems of low efficiency and high cost of tra⁃ ditional manganese pollution control methods，the genes related to manganese metabolism are screened by whole genome sequencing and bioinformatics analysis system，and their functions are analyzed.The genom⁃ ic library is constructed based on the Illumina sequencing platform，and the genome assembly is completed by combining FastQC、SPAdes and other tools. A 20.07 Mb genome（GC content 60.29%）is obtained， and the BUSCO integrity is 97.3%. Through blastp alignment and hmmer domain screening，16 key genes （87 scaffolds）are identified，including SMF1、PHO84、MTM1，etc.，involving manganese transport，de⁃ toxification and tolerance functions.Subcellular localization shows that the related genes are distributed in the plasma membrane，mitochondria，nucleus and other regions，and the multi-copy genes shows func⁃ tional diversity. GO and KEGG annotations shows that the candidate genes are mainly involved in energy metabolism，ion transport and stress response.PHO84 mediates transmembrane transport through ATPase， and MTM1 is involved in mitochondrial solute carrier metabolism. Studies have shown that Rhodotorula MF4 achieves efficient manganese removal by synergistically regulating the dynamic balance and energy metabolism of manganese ions through multiple genes，which can provide a molecular theoretical basis for the optimization of AMD bioremediation technology and the construction of manganese-resistant engineer⁃ ing strains.
    Investigation on the Process Flow and Equipment of Recovering Iron Resources from Tailings after Copper Separation
    XU Jiahe ZHOU Nanxin LIU Yi XIAO Guosheng
    2026, 42(01):  243-246. 
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    The total iron grade of iron tailings in tailings after copper separation iron resource recov⁃ ery system is more than 14.00%. In order to recover iron resources as much as possible and find out the rea⁃ sons for the high total iron grade in iron tailings，the process flow and equipment of iron resource recovery system are systematically investigated and analyzed. The process mineralogy analysis and beneficiation test of tailings after iron separation are carried out to explore the feasibility of further separation of iron tailings. The results show that the process flow of the iron resource recovery system is reasonable，the magnetic field strength of the magnetic separation equipment meets the process requirements，and the recovery of iron resources is sufficient. Although the total iron grade in the tailings reaches 14.90%，the mFe grade is only 0.42%，indicating that the magnetic iron minerals have been fully recovered.
    Research on Remote Simulation for Control of Coal Mining Based on Six-degree-of-freedom Somatosensory Platform
    HAI Sufeng RONG Bao WEI Dezhi ZHAO Ziwei ZHOU Shengzhe
    2026, 42(01):  247-250，254. 
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    In order to improve the standardization and accuracy of remote simulation of mechanical operation in coal mining operations，the design of remote simulation control method for coal mining based on six-degree-of-freedom somatosensory platform is carried out.Through the integration of remote control terminal，communication and vehicle subsystem，the full coverage of 5G wireless communication of coal mining equipment is designed to ensure the high speed and stability of data transmission. The advanced control system can control the movement of the platform in real time through the driving mechanism accord⁃ ing to the user 's operation instructions.At the same time，the sensor is used to feedback the state informa⁃ tion of the platform in real time，so as to realize the multi-dimensional and high-precision motion behavior drive based on the six-degree-of-freedom somatosensory feedback platform. The programmable logic con⁃ troller control technology is introduced，and the input，processing and output modules are continuously scanned through the loop mode，so as to realize the accurate remote simulation control and real-time ad⁃ justment of the terminal coal mining operation state.The application of this method in accordance with the specifications can significantly improve the accuracy of remote simulation control in coal mining opera⁃ tions，and provide strong technical support for the intelligent and remote coal mining operations.
    Test and Production Practice of Improving Activated Carbon Pickling Effect in Sanhe Gold Industry
    HU Shitong YANG Siting
    2026, 42(01):  251-254. 
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    In order to solve the problems of low recovery rate of carbon iodine value and poor adsorp⁃ tion effect after acid washing of gold adsorption carbon in Sanhe Gold Industry，in the process of acid wash⁃ ing regeneration of adsorption carbon，air supply transformation and acid water circulation are carried out to strengthen regeneration. The effects of direct acid washing and acid washing after transformation are com⁃ pared. The effects of air supply，air supply mode，acid washing time，nitric acid concentration and acid washing medium on the acid washing regeneration of gold adsorption carbon are investigated，and the ad⁃ sorption comparison test of activated carbon after acid washing is carried out.The results show that the ef⁃ fect of carbon pickling can be improved by adding air supply point and circulating pickling water in the pro⁃ cess of carbon pickling under the same other conditions.The concentration of nitric acid and pickling time have a great influence on the wet regeneration of gold activated carbon. Especially in the case of acid water circulation，the pickling effect is more obvious，and it can effectively avoid the cost waste caused by in⁃ complete reaction discharge of nitric acid，and alleviate the environmental pressure on the sewage treat⁃ ment system.