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    25 November 2020, Volume 36 Issue 11
    Discussion on Metallogenic Regularity and Prospecting Direction of Lancang LaochangMenglian Chachang Area in Yunnan Province
    WU Zhiguo
    2020, 36(11):  1-3. 
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    Lancang LaochangMenglian Chachang area is located in the ChangningMenglian polymetallic metallogenic belt,and the study of regional metallogenic laws has important guiding significance for prospecting breakthroughs.On the basis of comprehensive analysis and study of geological background,geochemical anomalies,mineral distribution and other characteristics,the area is divided into Laochang,Laba and Menglian Mine (chemical) concentration areas.Laochang leadzinc deposit is a typical deposit in the region.Its anomalous geochemical exploration and spatial distribution of the deposit have the characteristics of low,medium and high temperature metallogenic zoning.Starting with the zoning characteristics of the deposit,it is pointed out that the Laochang Mine (chemical) concentration area is dominated by lowtemperature metallogenic elements,while However,the geochemical anomalies and mineralization characteristics of the Laba and Menglian deposits are dominated by lowmedium temperature metallogenic elements,and the spatial zoning characteristics are not obvious.The geochemical anomalies and the distribution characteristics of ore (chemical) bodies in this area indicate that the regional metallogenic temperature and metallogenic elevation have a decreasing trend from high to low from north to south,which is considered to be different from the magmatic activity in Yanshan period,pointed out that the periphery of Laochang and the deep part of Laba are favorable target areas for prospecting.
    Metallogenic Regularity and Metallogenic Prediction of IronCopper Polymetallic Ore Deposits in the Eastern North of Tieshan Intrusion
    YANG Weiwei WANG Lei CAI Heng′an
    2020, 36(11):  4-7. 
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    There are many medium and small deposits distributed in the northeast part of Tieshan intrusion,which are affected by mining and working degree,and most of the surrounding and blank sections of the deposits have not been evaluated.In order to further carry out prospecting and exploration work in the deep part of the mining area and its periphery,expand the resource reserves,by sorting out and analyzing the previous data and combining the exploration data of ore deposits (points) in recent years,starting from strata,magmatic rocks,orecontrolling factors and geophysical prospecting,this paper summarizes the metallogenic regularity,and predicts the periphery and blank section of the mining area in combination with the geophysical prospecting results,and puts forward the metallogenic prediction target area,which includes three grade A,two grade B and two grade C.This indicates that the prospects for prospecting in the study area are good and it is worth further work.
    Analysis on Gold Polymetallic Mineralization Characteristics and Prospecting Prospects of Wushijiagayiti Area in West Junggar
    YIN Kebao YANG Wenlong YANG Qingmao ZHOU Xiaohua
    2020, 36(11):  8-13. 
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    In recent years,the prospecting achievements are remarkable.The goldcopper deposit of Bulansala city,the gold deposit of Wushijiagayiti,and various gold and copper deposits have been discovered in the Wushijiagayiti area on the northern edge of West Junggar.The rearch shows that:①The gold mineralization is closely related to the mediumacid rock mass and structure.It is generally produced in the quartz veins in the contact zone of the rock;②copper mineralization is widely developed in tectonic fractures and alteration zones.The main orebearing horizons;③The oreforming period in the area is mainly divided into two phases:one is the copper mineralization period related to the volcanic hydrothermal and tectonic activities of the Silurian; the other is the gold and copper polymetallic related to the intrusive activity and tectonic activities of the Late Carboniferous and the mediumacid magma mineralization period.
    Study on Sedimentary Facies and Sedimentary Evolution in Honggangnan Area of Songliao
    ZHAO Guojun ZHAO Qibin WANG Hongliang
    2020, 36(11):  14-16. 
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    Songliao Basin is the main petroleum basin in my country.The analysis of sedimentary facies and the study of the characteristics of sedimentary evolution in this area is an important basis for oil and gas exploration.Guided by highresolution sequence stratigraphy.Select the representative Honggang South area in the basin for research.Combining features such as the color of stratum core and bedding structure.Take technical measures as taking typical singlewell facies research as the point.the typical continuous well profile is line and comprehensive research to analyze the developmental characteristics of strata and regional sedimentary background of quantou qinshankou and yaojia Formation in Honggangnan.And further proposed and analyzed the sedimentary evolution characteristics of the area.Provide reference materials for the next stage of deeplevel oilfield geological development.
    Verification and Discussion on the Spacing of Longtangyan Iron Mine Exploration Project
    ZHANG Wenjuan
    2020, 36(11):  17-21. 
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    The detailed investigation of Longtangyan Iron Mine uses a 100 m×100 m net to explore and control the resource reserves.In the past two years,it has been discovered that the original exploration project spacing can no longer meet the requirements of mine development and mining projects through production exploration and development,mining and cutting,and mining projects.The layout requirements result in waste of engineering and mine volume.Through the comparison and verification with the detailed investigation stage,the density method is used to compare the exploration project spacing of the Longtangyan Fe25 ore body,and another reasonable project investigation spacing is determined in combination with the specifications to explore the resource reserves controlled by a network of 50 m×50 m.
    Geological Characteristics and Ore Controlling Factors of Anka Gold Deposit in Zamfara,Nigeria
    WU Bin HUANG Yuhan DU bin
    2020, 36(11):  22-26. 
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    MaruAnka greenstone belt where Anka Gold Deposit sited is an important gold metallogenic belt in northwestern Nigeria.In order to provide guidance for the prospecting work in this area,the ore controlling factors of Anka Gold Mine are clarified through mapping,drilling,sample identification,laboratory analysis,combined with comprehensive research on structure,stratum and metamorphism.The main structures in the area are a set of NNE thrust nappe structure and a series of NW and NNW conjugate secondary faults,the ore is constrained in Precambrian Cambrian regional metamorphic rock series.Metallogenic materials emplaced in the fracture zone,gold occurs as free gold in quartz veins and altered part of phylliteschistgneiss.Faults provide favorable space for oreforming,grade distribution and thickness of ore show strong relationships with the thickness of quartz vein,surrounding alteration and fracture zone.The genetic type of Anka gold deposit is classified as orogenic gold deposits of continental crust fluid origin.
    The Role of Mine Geology in the Production Process of Yata Gold Mine
    PENG Shihua
    2020, 36(11):  27-29. 
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    At present,underground mining is being carried out in Yata Gold Mine,whose gold ore body is strictly controlled by structural fracture zone.Because there is no clear boundary between gold ore body and surrounding rock,surrounding rock breakage and other objective factors bring great difficulties to mine safety production.To overcome these difficulties,in the process of mine production,mine geology provides basic data for mine safety production by means of analysis and study of metallogenic law,production prospecting,water exploration and drainage,roadway catalogue and other geological methods,and also plays an important role in optimizing mining design,guiding safe production,and extending the service life of mines.
    Feasibility Study on a Mine′s 60 m to 90 m High Stage Mining Technology
    GUO Wei
    2020, 36(11):  37-40. 
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    At present,the domestic many using phase open stoping is made between flatback cut and fill stoping in mining of the mine,the traditional experience,highly generally within 60 m.Even if higher stages are adopted,such as the 120 m high stage,segmented rock drilling is adopted,that is,the rock drilling with large diameter and deep hole downward is completed in two sections,and the secondary drilling level is increased in the middle,which increases the production cost.Aiming at a new mine with a height of 60 m stage,the technical feasibility of mining with a height of 60 m stage to 90 m high stage was studied from three aspects of stope stability,backfill stability and drilling method selection by means of FLAC3D numerical analysis,Terzaghi calculation model and empirical formula.The results show that when the stope width is 15 m and the backfill strength is over 3.24 MPa (equipped with 1∶6),the drilling method of increasing the bottom drawing height can meet the production process and safety requirements of the stope at 90 m high stage.With the development of mining technology and equipment,it is expected that more and more mines will have the possibility of high stage mining in the future.
    Research and Application of Primary Well Formation Technology of Mediumdeep Hole Blasting
    LUO Genping HUANG Huatao CHEN Lin
    2020, 36(11):  41-43. 
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    At the time of mediumdeep hole blasting,the well is generally characterized by small crosssection and low depth.Generally,the depth is controlled within 12 m,and there are few cases of blind and sky slide wells formed by blasting around 20 m,and most of them are failure cases.However,with the advancement of science and technology,the renewal of equipment,the mining section has gradually increased,and the requirements for the construction technology of the sky slide well have gradually increased.In order to ensure the safety and efficiency of mediumdeep hole blasting,therefore,an effective example of mediumdeep hole blasting once well formation was implemented from the aspects of blasting design,parameters,equipment selection,etc.It is of great significance to study the technology of onetime well construction.
    Stability Evaluation of Rock Slope Based on Multidimensional Cloud Model
    ZHANG Qing CHEN Juan LU Lisheng CAO Zuozhong DUAN Weiping
    2020, 36(11):  44-49. 
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    In order to evaluate the stability grade of rock slope accurately,the multidimensional cloud model theory is proposed to evaluate the stability grade of rock slope according to the characteristics of randomness and fuzziness,which are influenced by many evaluation factors.From the five indexes of topography,rock mass environment,artificial excavation,earthquake,meteorology and hydrology,14 factors are selected as the evaluation indexes of rock slope stability.Based on the cloud theory,the digital characteristics of the cloud model are obtained by using the index approximation method,and the weight of each evaluation index is determined by combining with the improved critical method to generate a multidimensional cloud model for the evaluation of rock slope stability grade.By using this model,the measured values of 8 groups of rock slopes in xichangtaihe iron mine of Chongqing Iron and Steel Group are input to the comprehensive certainty degree of each standard slope stability grade,and the slope stability grade is determined according to the principle of maximum certainty degree.The evaluation results are compared with onedimensional cloud model,fuzzy evaluation method,CSMR method and the actual state of slope.The results show that the multidimensional cloud model is more efficient and accurate in the evaluation of rock slope stability.
    Research on Smooth Blasting of Trolley Driving in No.1 Copper Mine of Dahongshan Iron Mine
    SONG Zhaogang LI Jun HU Yuan QIN Longjiang
    2020, 36(11):  50-53. 
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    The key factors for good roadway formation are mainly the lithology of the ore rock,the development of the structure,the sequence of blasting holes,the amount of charge in the holes and the distance between the surrounding eyes.At present,the initiation sequence and the amount of charge in the hole in the underground excavation construction of the Dahongshan Iron Mine are both mature technologies.At this stage,the smooth blasting test of the trolley is mainly used to adjust the distance between the peripheral eyes.In order to explore the smooth blasting technology of trolley boring in Dahongshan Iron Mine No.1 copper mine belt,through the comparison of the test results of the trolley boring smooth blasting with different peripheral eye spacings,the periphery of the optimal trolley boring smooth blasting effect was found.The eye spacing lays a solid foundation for vigorously promoting the smooth blasting of the trolley.With the in-depth study and summary of the research,the operation efficiency of the various types of metal mines is improved,the safety risk is reduced,and it will be more widely applications.
    Study and Analysis on Stability of the Increase and Expansion of Hequ Opencast Mine Inner Dump
    XU Guojun WANG Yi LI Chengye DONG Zefang HAN Peng XU Jinxin
    2020, 36(11):  54-56. 
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    With the development of openpit mining into deep concave mining stage in China,the difficulty of land acquisition in the drainage field increases day by day,and the cost of land acquisition increases continuously,which promotes the development of the drainage field to a high and steep direction.Although the development of high and steep drainage field reduces the land acquisition and the production cost of the mine,the increase of the height of the drainage field also brings a series of problems.In this study,the stability of the increased and expanded capacity of the inner dump was analyzed with the surface mine in jiuxian county of Hequ county as the engineering background.Rhino3D was used to quickly build a 3D model based on the initial data of the contour line of the drainage field in the open pit mine of hequ county.Meanwhile,Slope and FLAC3D were used to analyze the stability of the slope when different heights were increased.
    Research on Deformation Law of Rock Mass Mining in Complex Ground Stress
    LIU Jixiang ZHU Ming ZHANG Junkui SU Chengzhe YAN Dongjin
    2020, 36(11):  57-59. 
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    The deformation law of phyllite rock mass under complex stress is complicated,Engineering rock mass has many problems,Study the deformation law of rock mass under complex stress,Provide theoretical basis and technical support for solving related engineering problems.According to the stress distribution and the rock mass mechanical parameters of a mining area,Build underground threedimensional model and numerical analysis model.Designed 6 simulation schemes,Analysis the X、Y、Z axial displacement and stress at each point,It shows that the displacement value of most points is greater than the critical value of deformation,The maximum comprehensive displacement is between 550 m and 600 m,Coinciding with the first fissure in this area.Master the law of rock mass deformation in the mining area,For disasters such as shaft wall cracks and open slope sliding,Formulate the long anchor cable reinforcement,waste rock filling treatment,slope cutting and load reduction management plan,guiding the normal production of mining enterprises.
    Research and Optimization of Medium Deep Hole Mining Method in Steep Thin Ore Body of Xinda Gold Mining
    XIE Jun GENG Rong WANG Yiyong WANG Xiaofeng CHANG Xu
    2020, 36(11):  60-62. 
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    In recent years,with the development of mining technology,medium and deep hole mining has been increasingly adopted in steeply inclined thin veins.In order to reduce production costs,improve economic efficiency and safety factor.By conducting field tests on fanshaped mediumdeep holes and parallel mediumdeep holes in the mining room,it is concluded that the fanshaped mediumdeep holes have less engineering volume than the parallel mediumdeep holes and a small cuttocut ratio of 1,000 tons.The fanshaped mediumdeep hole mining method has been popularized and applied in steeply inclined thin veins,and has achieved certain economic benefits.
    Innovative Application of Combination of Shallow Mining Design and Solid Waste Filling
    WANG Zhongqiang ZHANG Jun WEI Fuhai SUN Yuan JU Weiwei
    2020, 36(11):  63-65. 
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    In the development engineering design of Luohe Iron Mine,in order to reduce the mining dilution rate,the mining preparation engineering is arranged at the level of -497 m,resulting in the loss of the triangular ore body left in the lower part.Through the design of -512 m shallow mining house,the 120 000 tons of triangular ore under the pressure of 259# stage stope is recovered to reduce the dilution;the level of -455 m is the level of drilling and return air,during the construction period,the waste rock is piled up by the onsite roadway,making -455 m roadway in 80~90 Lane area of 55 m level is occupied by waste rock,and the passage is blocked,which seriously affects the ventilation of the site and the passage of personnel and equipment.By using 259# stope cutting patio as waste rock filling well,a large amount of waste rock piled up in the upper -455 m horizontal 70~100 lane and 28~33 access area roadway is filled to -512 m shallow goaf.Through innovative application,it not only recovers the corner ore body and improves the recovery rate of resources,but also solves the problem that the waste rock in -455 m horizontal drilling roadway can not be treated for a long time,and the mining cost is greatly reduced by using the solid waste filling compared with the tailings cemented filling.
    Ground Pressure Control and Mineral Recovery Technology in Ground Pressure Area of Tongkuangy Mine Natural Caving Method
    WANG Zeze
    2020, 36(11):  66-69. 
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    According to the characteristics of natural caving method such as large mining influence and serious ground pressure.In this paper,the natural caving method of Tongkuangyu Copper Mine is taken as the research object,combined with the current status of the mining of the main and auxiliary layers of the mine,the numerical simulation of the stress evolution of the ore body chassis during the natural caving method mining,and the stress at the junction of the main and auxiliary layers and plastic zone analysis.Aiming at the recovery of the amount of ore in the substratified highpressure ground pressure zone under extreme conditions,an orejoining scheme is proposed in which the lower part reopens the bottom structure,the central part is forced to collapse,and the upper part naturally collapses.The simulation and practical results prove that the bottom structure of the auxiliary layer is in a highstress area due to the pressure arch structure,especially before and after the main and auxiliary layer stopes are penetrated.Therefore,the bottom structure of the auxiliary layer should be strengthened in advance or deep holes should be used to discharge pressure engineering.Secondly,for areas where the geopressure area appears to be severe,you can wait for the geopressure to stabilize and then dredge or rebuild the bottom structure to carry out horizontal ore connection.
    Research on Pressure Relief by Hydraulic Fracturing Technology of 68310 Ventilation Roadway in Du'erping Coal Mine
    WANG Junjie WANG Junhu MA Xingen WANG Xiaolong
    2020, 36(11):  70-72. 
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    The cutting roof pressure relief technology has been successfully applied in many mining areas,and has achieved huge social benefits.Dushanping Coal Mine of Xishan Coal and Electricity Group is a typical high gas mine.Great security risks.In view of this,the hydraulic fracturing technology was actively tested,the overall control idea of "lowlevel fracturing+highlevel weakening" was put forward,and the experiment was conducted with the 68310 return air lane as the engineering background.
    Study on Reasonable Sealing Length of Predrilled Hole in the Coal Seam of Xiagou Coal Mine
    CUI Honglei XING Lijie SUN He HUANG Wenjun
    2020, 36(11):  73-75. 
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    The rationality of the length of hole sealing for the seam drainage borehole in the extraction of a greater influence on the quality,when the hole sealing length is bigger,does not favor the hole sealing section of the gas extraction,and hole sealing cost increases,whereas when the hole sealing length is small,without hole sealing part and the coal wall fracture conductivity,borehole leakage and affect the quality of borehole extraction.In order to determine a reasonable length of hole sealing,in view of the ditch coal mine 302 working face under the specific geological condition,the singlehole acoustic emission on the pressure relief area and the stress,high range are studied,through the analysis of unloading zone,the reasonable hole sealing length,and combining the test hole drainage borehole surrounding extraction data,verified analysis,it is concluded that the reasonable hole sealing depth of the working face is 8 m.
    Optimization of the Process of Cementation Filling and Roofing in the Tailings of Empty Stope in Fulaozhuang Iron Mine
    WANG Qinghe LI Jie REN Fangyuan
    2020, 36(11):  76-77. 
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    The filling joint is to fill the filling material as close to the ore,rock roof or false roof as possible,so that the filling body supports the roof or false roof of the goaf.In order to solve the problem of roof or false roof falling caused by the poor quality of the filling joint,or to prevent the second step from returning to the mining stone,the ore body is subject to excessive ground pressure.In this paper,the pit filling of Fulaozhuang Iron Mine is taken as the research object.Through the optimization of the filling pipe,multiple middle isolation wooden walls are added,and the method of moving the cutting opening multiple times makes the pit roof filling more safe and fast.The effect is significant and can Effectively increase the topreceiving rate and reduce the security risk of secondstep mining.
    Numerical Simulation Analysis on Instability Failure of Coal Feeder Chamber of the 214 Coal Bunker in Xiashijie Coal Mine
    ZANG Long
    2020, 36(11):  78-81. 
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    Due to the longterm influence of surrounding rock,water and pressure,the concrete bearing structure of coal feeder chamber of No.214 coal bunker in Xiashijie coal mine is seriously deformed and damaged,which can not meet the normal production demand of the mine.Combined with theoretical analysis and numerical simulation,the reasons for the instability and failure of the coal feeder chamber of 214 coal bunker and the influence of high stress in coal pillar and water on the stability of the feed chamber are analyzed.The results show that under the action of high stress,the concrete bearing structure and surrounding rock of the chamber are in a large range of shear yield state,and the bearing structure surface is damaged by the strong extrusion of surrounding rock; the expansion and weakening of the carbonaceous mudstone and root soil rock of the chamber floor when encountering water will lead to the strong swelling of the surrounding rock of the floor,and the bearing beam of the concrete floor will be squeezed by the surrounding rock of the floor.It is almost in the state of tensile failure,and the column is also in the state of tensile failure due to compression,which leads to the overall instability of the concrete bearing structure.
    Optimization of Lifting Capacity in Zhangzhuang Iron Mine
    SUN Yongmao HUANG Mingjie ZHANG Qiang LIU Jiandong
    2020, 36(11):  82-85. 
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    The hoisting system of the main well of Zhangzhuang iron mine adopts multirope friction wheel hoist and 19 m3 bottom discharge double skip hoisting mode,with the designed maximum annual hoisting capacity of 6.4 million tons for a single well.Since the heavy load test of zhangzhuang mine production system in 2015,and the increasing of production,higher requirements have been put forward for the lifting capacity of the main well lifting system.In order to the maximum the main shaft can improve performance,reduce the working factor of main shaft,improve operational efficiency,combined with the current production demand,through the study of many sided,eventually improve the system by optimizing operation curve and the best optimization purpose,have laid a solid foundation for zhangzhuang iron ore stable production,at the same time study and process for large underground mine main shaft hoisting optimization has certain reference significance.
    Smooth Blasting Technology with Continuous Charge Based on Low Energy Density Explosives
    LIU Jiancheng
    2020, 36(11):  86-89. 
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    In order to improve the forming quality of smooth blasting,a technology of continuous charge smooth blasting with low energy density explosive is proposed.LSDYNA is used to simulate and compare the stress field of interval charge of 2# rock emulsified explosive and continuous charge of low energy density explosive.Then the technology is applied to controlled blasting of No.4 tunnel of Changjiu (Shenshan) limestone mine and smooth blasting of openpit slope.The results show that in the interval charge model of 2# rock emulsified explosive,the peak stress of charge section and noncharge section is quite different; in the continuous charge model of low energy density explosive,the peak stress of the same detonation center distance along the borehole axis is consistent; the continuous charge with low energy density explosive can avoid excessive damage of charge section and over excavation of noncharge section.It has high residual porosity,saves the binding time of detonating cord,improves the charging efficiency of surrounding holes and saves the blasting cost.
    Research on Progress Control of Ground Pregrouting Project
    YANG Xue et al
    2020, 36(11):  93-95. 
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    Research Progress of Jet Mill Technology in Powder Processing
    ZHANG Jun LIU Jianguo WANG Bin
    2020, 36(11):  96-102. 
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    Jet mill technology is an important technical means for the processing of micronano powder.The research can effectively improve the utilization rate of resources.The article expounds the jet mill smashing technology basic theory in the study of classical theory,the research progress in the basic theory of computer simulation optimization,airflow pulverization technology in the field of mining and metallurgy,biological research progress of application of horizontal disc type (flat) jet mill,circular tube type jet mill,the spray type jet mill,the target type jet mill,fluidized bed jet mill's basic structure,working principle and research status;At last,it is pointed out that the main problem of air flow comminution technology is low energy utilization rate,and the research direction of air flow comminution technology in the future is prospected.
    The Intelligent Manufacturing of Aggregate Enterprises
    LANG Guanying WANG Yan WANG Yu LI Wei
    2020, 36(11):  103-108. 
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    In order to improve an aggregate factory processing capacities,reduce energy consumptions,speed up the logistics operations,and reduce the labor costs in each link,traditional aggregate enterprises in the transformation process to intelligent and automatic factories can carry out the solutions of confusions in production management.According to the neglect of energy over consumption,bad working environment of shipping and the low efficiency of logistics operation,constructing intelligent factory of the aggregate industry is set as the topic.Combined with the experience of integrating IT application with industrialization,the technology application of Internet of things,Internet plus,automation control and mobile Internet applications,enterprise resource management,energy management,big data processing,delicacy management and other management concepts,a new enterprise management system based on information and automation are formed.From those point above have been mentioned,the aggregate enterprises,which started late in the intelligent construction,in the new round of scientific and technological revolution,have attempted continuously integrating with new technologies.In new constructed aggregate factories,manual work has been replaced by machinery and information system in order to reduce overconsumptions,increase production efficiency,optimize costs; Thus,this transformation builds a better foundation for aggregate enterprises for a further development space to a large scale and intensive ones.
    Study on Comprehensive Utilization of Cassiterite in Flotation Tailings of a Copperzinc Sulfide Ore
    QI Zhongxu WANG Shuo ZHENG Runhao SUN Dayong FENG Chen HAN Yuanyan
    2020, 36(11):  109-112. 
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    The flotation tailings of a copperzinc sulfide ore contain relatively highvalue tin elements,and its cassiterite inlay is uneven in particle size.The combined gravityflotation process is used to comprehensively recycle the cassiterite,and a tin concentrate with Sn grade of 20.64% and Sn recovery rate of 6005% is obtained through grading and gravity separation.In order to further improve the utilization of tin resources,the flotation test of gravity middlings and extremely finegrained ore was carried out.Under suitable regrind fineness,the Sn grade of 1.39% was obtained through physical and chemical combined desliming and flotation.The tinrich medium ore with Sn recovery rate of 5.36%,and the combined gravityflotation process finally recovered 65.41% of the tin in the tailings,providing a reference for the comprehensive utilization of tin resources.
    Study on Flotation Recovery and Extraction Test of Lithiumbearing Bauxite from Henan Province
    ZHANG Rongzhen YUN Hui LIU Baishun CHENG Hongwei WENGYimin HAN Ya
    2020, 36(11):  113-116. 
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    The lithiumbearing bauxite which comes from Henan province contains 0.26% Li2O,and lithium mainly occurs in the kaolinite and illite.In order to determine the development and utilization of lithiumbearing bauxite technology,bauxite flotation tests and the experimental study on the extraction of lithium have been carried out.The results show that through two roughings,one cleaning and middling back to the flowsheet in turn flotation closedcircle process,the final Al2O3 grade is 61.72%,A/S is 11.45,and Li2O grade is 0.57%,recovery rate is 78.97%;Rich lithium concentrate with concentrated sulfuric acid curing liquid mixed (solidliquid ratio 1∶1,the curing temperature 180 ℃,leaching liquidsolid ratio 2∶1 to 3∶1,10 min leaching time,leaching temperature at room temperature,the leaching rate of Li2O can reach 9464% and got the purity of 99.56% lithium carbonate products finally.Thus,the process of sulfuric acid curingleachingpurificationextracting lithiumcan achieve high recovery rate and purity of lithium in Henan bauxite,and this process has certain practical value.
    Study on the Technology of Recovering Gold from Tailings of a Gold Mine
    ZHANG Xingwang SUN Zhiyong
    2020, 36(11):  117-120. 
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    The tailings of a gold mine contain 0.68 g/t gold and 4.50 g/t silver,which has high comprehensive recovery value.In order to recover useful elements,the process mineralogy and beneficiation process of a gold mine tailings were studied.The results of mineral phase analysis show that gold exists in the form of native gold and wrapped gold,of which natural gold accounts for 56.50%.The results show that under the condition of 80% of -0.074 mm,the gold concentrate with 27.68 g/t gold grade,107.311 g/t silver grade,72.18% gold recovery rate and 42.77% silver recovery rate can be obtained by using one roughing,three cleaning and one scavenging flotation process.
    Study on the Beneficiation Technology of a Certain Lean Maghemite
    WANG Luxin YU Ying HE Yunlin LI Hong LIU Guoyi LI Chunyan
    2020, 36(11):  121-124. 
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    In order to make a reasonable development and utilization of lean maghemite resources in a certain mine,a technological mineralogy and selectability test research was carried out for the nature and selectability of the ore at the current mining site.The test results show that the use of low intensity magnetic,high intensity magneticanion reverse flotation process can obtain a good separation index of concentrate iron grade of 68.55%,concentrate yield rate of 36.41%,metal recovery rate of 79.92%,and tailings grade of 9.86%.The selectivity of the ore is good,which provides a reliable technical basis for the rational development and utilization of the ore.
    Beneficiation Process test of a Limonite Ore in Henan
    WANG Qiang et al
    2020, 36(11):  125-128. 
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    Beneficiation Test of a Fine Hematite Ore
    LI Yi et al
    2020, 36(11):  129-131. 
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    Study on the Purification of Crude Nickel Sulfate from a By-product of Copper Smelting
    CHEN Yufa et al
    2020, 36(11):  137-139. 
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    Industrial Test Research on Tailings Classification of a Large Porphyry Copper Ore
    ZHAO Jitang et al
    2020, 36(11):  140-141. 
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    Optimization and Practice of Process of a Concentrator
    WANG Haixia
    2020, 36(11):  142-144. 
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    Experiment on Recovering Iron Resources from Waste Rock in Inner Mongolia
    GUAN Di et al
    2020, 36(11):  151-152. 
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    Study on Intelligent Grinding and Separation Technology in Zhangzhuang Iron Mine
    CHEN Shun et al
    2020, 36(11):  153-155. 
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    Status and Significance of Comprehensive Utilization of Iron Tailings Resources
    LIANG Yantao et al
    2020, 36(11):  156-157. 
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    Research on Comprehensive Utilization of Iron Tailings in Harmony Mountain
    ZHANG Guichan et al
    2020, 36(11):  158-159. 
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    Experimental Research on Iron Ore Fine Crushing Technology
    HU Shenchen
    2020, 36(11):  160-162. 
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    Beneficiation Test of Gushan Hematite Concentrate Quality Improvement
    FENG Jian et al
    2020, 36(11):  163-164. 
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    The Leaching Rate Improved Experiment of a Fine Coating Gold
    LI Yuxi et al
    2020, 36(11):  165-166. 
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    Study on the Imaging Technology of Mining Intelligent Robot Snapshot
    WANG Wensheng
    2020, 36(11):  169-171. 
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    Chunks of coal gangue in the course of carriage jam serious easy cause equipment wear and tear,in order to realize the coal transfer in the process of waste rock fragmentation jam,large machine caused by the problem of large equipment maintenance time is long,input,using nonlinear photographic imaging model and K means clustering algorithm for image acquisition and intelligent robot obstacle recognition was studied,and realized with coal waste more body shape,regional characteristics of nonlinear camera and accurate extraction,provides an important reference for the application of intelligent robot,to solve the problems in the process of coal transfer has practical significance.
    Application and Discussion of Rubber Belt Inclined Well in Exploration of Deep Well in Metallurgical Mine
    MA Zhongli
    2020, 36(11):  172-174. 
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    In view of the exploration demand of deep well development plan of a mine under construction,by application situation is introduced and the development of belt conveyor belt conveyor transport characteristics influence factors analysis,and combined with deep well develop tape slope plan investment economical comparison with inclined shaft with tape,and adhesive tape transport system in the analysis and discuss the key problems in the process of running,it is concluded that with the continuous development of adhesive tape transportation technology,in the largescale deep well development,the belt inclined well development will be very promising,it provides decision support for the choice of deep well exploration plan in metallurgical mine.
    Construction and Application of Online Monitoring System Based on FBG Roof Separation Indicator
    WANG Mao LIANG Minfu HU Xiukun
    2020, 36(11):  175-178. 
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    Aiming at the existing problems of low efficiency,lagging monitoring results,poor reliability and accuracy in present roadway roof separation monitor,a new highprecision FBG separation indicator was designed through theoretical analysis,laboratory test and field test according to the fiber grating sensing principle.On this basis,a realtime online roof separation monitoring system was proposed.The calibration and performance test results of roof separator indicator suggested that it has good linearity sensitivity and high sensitivity.The linear fitting coefficient is 0.998 3 respectively.The sensitivity coefficient is 1.6 pm/mm.The minimum separation variation of about 0.63 mm can be monitored.The monitoring system was successfully applied to roof separation monitoring of the14301 # track roadway in Shaqu Coalmine.The monitoring results showed that the online roof separation monitoring system based on the highprecision FBG separation indicator has the advantages of high precision,good stability and longdistance signal transmission,which can achieve realtime dynamic monitoring and provides an effective method for longterm online monitoring of roadway roof separation.
    Development and Application of Intelligent Design System for Openpit Blasting
    LI Zehua LI Shunbo YANG Jun WANG Hongqiang LI Lijie FAN Baolong
    2020, 36(11):  179-181. 
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    In order to improve the standardization and convenience of Openpit Bench Blasting design,the Openpit Bench Blasting design system was developed and studied.With Visual C++ as the development platform,the software adopts MFC framework and combines OpenGL threedimensional engine development technology to realize the establishment of software selfdevelopment ecology from the bottom.The field engineering practice shows that the blasting designer can easily realize the hole layout design in threedimensional environment and the blasting network design as well as accurate GPS hole layout through this system,and achieve good blasting effect,which improves the design quality and speed of step blasting.Intelligent blasting design system can realize digitalization,scientificalization,automation and high efficiency of mine blasting design,which is of great significance for open blasting.
    Application of Intelligent Rescue Monitoring System in Coal Mine Safety Production
    LI Yaozong
    2020, 36(11):  182-184. 
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    In order to further improve the efficiency of coal mine rescue,through technical research,designed a set of intelligent rescue monitoring system with communication base station as the core.According to the analysis of the structure and working principle of the system,through the practical application effect in the underground of Danshuigou Coal Mine,the intelligent rescue monitoring system has a positioning accuracy of 95% for the personnel,realizes the threedimensional imaging of the dynamic position of the personnel,improves the rescue efficiency to more than 80%,effectively shortens the rescue time of the coal mine accident,and achieves remarkable application effect.
    Application of YZG7 Mine Drilling Track Instrument in Zhujiadian Coal Mine
    HE Junzhong GUO Yunfeng, Liu Chunxi
    2020, 36(11):  185-186. 
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    In this paper,the drilling trajectory measurement is taken as the research object,aiming at the large deviation between the actual trajectory and the design of drilling caused by the traditional drilling method of rotary drill,and combined with the field application of mine,the drilling trajectory measurement is proposed.This paper describes the structure,principle and construction method of borehole track recorder used in YZG7 mine and its application in the field of Zhu Jiadian coal mine.In practice,the deviation of the position of the end hole and the designed end hole is 2.28 m up and down,and 7.62 m left and right,and the drilling situation of the track of the real drill is mastered.
    Application of 3Dmine in the Management of a Tailings Pond
    ZHANG Shuchen CHEN Weikang LIU Fangbin YAO Gang XIE Tian
    2020, 36(11):  187-188. 
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    In order to adapt to the trend of digital and visual mine management,to improve the management level of tailings ponds,the actual production problems are solved based on 3Dmine mining engineering software.By means of tailings pond data,a 3D model of the tailings pond was built to solve practical problems such as analysis of storage capacity,calculation of dam volume,estimation of solution volume and tailings volume,optimization of tailing discharge plan.The application of engineering examples achieves the expected effect.This study means significant to the practical problems of tailings pond production for those similar mines.
    Method of Analyzing the Mining Rights Area by Google Earth
    HU Ming
    2020, 36(11):  189-191. 
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    Classic method of Global Mapper and direct method of coordinate transformation are the two main methods for bulk importing coordinate data of mining rights area into Google Earth.Aiming at improving work efficiency,these two methods are compared in terms of convenience and steps in operation,numbers and sizes of required softwares and etc,and summarizes key findings that direct method is the more convenient way in bulk importing mining rights area coordinate data with advantage of fewer softwares and in smaller sizes,which is more conducive to improving work efficiency.
    Test and Application of Digital Electronic Detonator in Step Blasting of Sijiaying Openpit Mining
    YE Huishi ZHANG Yang HU Yajun YU Chaoqun
    2020, 36(11):  192-194. 
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    The horizontal steps of the open pit mine of Sijiaying Iron Mine are divided from top to bottom and layered by layer.The stop steps adopt the interhole differential blasting method for deep hole blasting.For the blasting process,there is blasting vibration and large disturbance,and the blasting effect is poor.The product consumes a lot of money and has high cost.The digital electronic detonator is characterized by high delay precision,flexible time setting,intelligent network detection,and reliable safety performance.The holebyhole detonation is realized,and the blasting operation is significantly reduced under the premise of ensuring the blasting operation is intrinsically safe and reliable.Vibration,improve blasting effect,reduce the unit consumption of blasting explosives,save the cost of blasting,and improve the efficiency of mining labor.
    Research on PLC in Electrical Automation of Mine Equipment
    QU Shiqi
    2020, 36(11):  200-200. 
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    Threedimensional Numerical Simulation of the Slope Stability of Hunchun Zijinshuguang Gold and Copper Open Pit Mine
    XU Hongliang
    2020, 36(11):  201-205. 
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    In order to study the slope stability of the Hunchun Zijin Shuguang gold and copper open pit,the 3GSM structural plane photogrammetry and point load test are carried out.Then it takes the quality grading index for main rock basis,and uses HoekBrown to study mechanics parameters of the slope rock mass.The threedimensional model of the open pit mining is established combining with the medium to longterm mining plan of open pit.An elasticplastic constitutive model is used to calculate the slope stability based on FLAC 3D.The results of threedimensional numerical simulation analysis show that:①The north slope stability is affected by fault structure and fracture zone,the quality of rock mass is class IV,and the local fracture zone is class V;②After excavation to the 6th year,the plastic zone is mainly distributed in the northeastern slope and fault alteration zone of the middle slope;③After excavation to the final boundary slope,the plastic zone in the deep part of the northwest slope is obviously increased in the size of area and the degree of penetration.Reinforcement and drainage measures should be taken for the safety of slope.
    Study on Roof Breaking Under Influence of Mining in North Yellow River Field
    SHANG Jibin ZHANG Guiyin
    2020, 36(11):  206-207. 
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    In order to analyze the roof breaking process of the Yellow River North Coal Field under the influence of mining,the discrete element numerical simulation software UDEC was used to simulate the roof breaking process of the thin coal seam stope in the Yellow River North Coal Field.The first step and the periodic step,combined with related theories to make a comparative analysis,enrich and improve the movement law of the overlying strata on the thin coal seam stope,and provide a basis for the control design of the stope roof.
    Present Situation and Analysis of Safety Treatment of Mine Ground Pressure Disaster
    YAN Siyun ZHANG Dianji
    2020, 36(11):  208-211. 
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    In order to analyze the current status of mine ground pressure disaster safety treatment,the stability research of mine ground pressure and the status and development of ground pressure disaster control are introduced.It comprehensively expounds the theoretical achievements of ground pressure disasters in deep mines at home and abroad,analyzes the safety problems of ground pressure disasters in China,uses a variety of safety evaluation methods combined with fuzzy mathematical modeling for quantitative safety grade evaluation,and proposes a safety governance plan,and Point out the development direction of China's green mines to promote the sustainable development of China's safe green mines in the future.
    Study on Risk of Rockburst in Driving Face Based on Microseismic Method
    XU Dalian SUN Zhenping LIU Chungang ZHANG Jing
    2020, 36(11):  212-214. 
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    In order to study the risk of rockburst in the driving face,this paper takes Zhangshuanglou Coal Mine of xukuang group as the research background,studies the risk of rockburst in three driving faces of 74104 working face by using the microseismic method.The research shows that the leading influence range of the cutting driving face is 35~58 m,the leading influence range of the material Road West driving face is 18~ 76 m,and the material Road West driving face is 18~76 m The advance influence range of the driving face in the east of the road is 44~120 m;the mining earthquake intensity is affected by the distance between the driving face and the F1 fault,the closer the distance is,the higher the frequency energy of the mining earthquake is.In view of this situation,more reasonable supporting measures are put forward to ensure the smooth and safe driving of 74104 working face.
    Analysis on Landslide Risk and Influence Scope of Waste Dump
    ZHAO Yuanqun TANG Kai WU Xiaogang QIN Ke
    2020, 36(11):  215-216. 
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    Residential areas, factories and other facilities are often distributed downstream of the dump site.Once the landslide occurs,the consequences will be serious.In order to accurately predict the extent and scope of impact of the dump landslide,by analyzing the risk source terms of the dump landslide,the norm determination method,energy equation method,engineering analogy method and propagation formula method are used to affect the impact range of a dump yard after a landslide After calculation,it is concluded that the length of the maximum impact area after a landslide of a dump is 208 m,and the impact degree analysis is carried out,which has a certain guiding effect on the prevention and supervision of the dump.
    Creative Thinking on Mine Safety Education and Training
    LI Shunfeng et al
    2020, 36(11):  226-227. 
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    Research and Application of Ultrasonic Nebulizer to Reduce Dust
    GAN Shuyong XU Feng ZHENG Zhuangzhi JIA Mintao WANG Xingwu ZHANG Liguang
    2020, 36(11):  231-232. 
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    In order to solve the problem of dust pollution in the crushing and screening workshop of a mine,the nozzle atomization dust reduction experiment was designed according to the nozzle atomization theory,and the ultrasonic atomization dust reduction technology was applied in the mine crushing and screening workshop according to the experimental results.The experimental and application results show that the geometric structure of the ultrasonic atomization generator's liquid atomization device,the gasassisted atomization device and the mist beam former affect the atomization parameters and flow characteristics of the spray,the liquid atomizer and the gasassisted atomization device Affects the initial breaking and atomization of liquids,and the mist beam former affects the secondary breaking of droplets and constraining the liquid beam shape;the gasliquid ratio of the ultrasonic atomization generator has a power function relationship with the gasliquid pressure ratio,and the power exponent is -1.09;The smaller the particle size of the droplets,the higher the dust reduction efficiency of the droplets.When the droplet D50 is 23 μm,the dust reduction efficiency of the droplets is above 94%;the vibration sieve feeding belt and the upper sieve belt of the mine crushing and screening workshop are used to receive materials.The ultrasonic atomization generator is arranged at a point.After the ultrasonic atomization generator is turned on,the dust concentration in the workshop is reduced to 5.86~10.54 mg/m3,and the dust reduction efficiency is above 71.38%.
    Design and Application of Extraction Ventilation and Dust Removal System in Comprehensive Excavation Face of Rock Roadway
    LING Fengtao YANG Junlei
    2020, 36(11):  233-234. 
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    In order to solve the problem of dust pollution and ventilation in the comprehensive excavation face of 44205 air return lane (rock lane section) at hongliulin coal mine,based on the consideration of the production process and location of the comprehensive excavation face of 44205 air return lane,the draft ventilation is proposed ,the air volume and the distance between the air inlet and the working surface are calculated and analyzed.According to the calculation results,the extraction fan of model FBCD 9.0/2×30 was selected,and a negative pressure telescopic air duct with a diameter of 800 mm was used.The application shows that:when the distance between the air inlet and the working surface is within 3 m,the maximum total dust and respirable dust at the driver's position are only 1.3 mg/m3 and 0.7 mg/m3,which significantly improves the working environment of the working face.
    Research on Geological Environment Treatment Technology in Tongguan Gold Mining Area
    GUO Qiming GUO Jing
    2020, 36(11):  235-237. 
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    By analyzing the geological environment of Xitongyu in Tongguan gold mining area,the restoration and treatment technology is studied.Six technical methods including soil reconstruction and remediation,slag wall and gabion gabion blocking,water diversion system reconstruction,active protective enclosure reinforcement,biological greening reclamation,and monitoring engineering were used to systematically elaborate the Tongguan gold mining area in XiTong Restoration and management technology of treatment area.This will provide important engineering practice experience for other projects such as engineering geological environment management,topography and landscape restoration in the future green mine construction.
    Ventilation Design for Deep Well Pump Room of a Mine Thickener
    HU Shouquan et al
    2020, 36(11):  238-239. 
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    Accurate Leak Location Method for Non-uniform Slurry Pipeline
    LI Shenpeng et al
    2020, 36(11):  245-247. 
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    Application of FEM in the Design of Tailings Pond Return Well
    ZHU Xuesheng et al
    2020, 36(11):  250-251. 
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    Comparative Analysis of Drilling and Blasting of D310 and D250 Cone Drills
    YANG Gang et al
    2020, 36(11):  252-254. 
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    Supporting Technology of an Unstable Roadway in a Mine
    LIU Kaiqiang
    2020, 36(11):  255-256. 
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    Thoughts on Enterprise Employees Accepting Safety Management
    ZHU Libo
    2020, 36(11):  257-258. 
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