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    25 January 2020, Volume 36 Issue 01
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    Cultivation and Promotion of Mine Skill Master Craftsman Spirit Zhu Qingshan et al
    Zhu Qingshan et al
    2020, 36(01):  1-3. 
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    Study on Fine Process Control and Safety Management of "DMV" in Luling Mine
    Deng Hanwen, Guan Ruichong
    2020, 36(01):  4-6. 
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    Coal on the economic development of China played a very important position,is the guarantee to the safe operation of coal enterprise to ensure the premise of enterprise economic benefits,in order to obtain more excellent way of safety management in luling coal mine of huaibei mining industry group as the research object,to regulate the procedures conversion,to strengthen the process control and luling mine pioneered "DMV" fine process control security management,significantly lower security hidden danger,employee misconduct greatly reduced,The number of violations decreased by 20% in the first quarter of 2019 compared with the first quarter of 2018;Engineering effect is good,the efficiency increased,Ⅲ 1022 under floor drainage lane footage from the original 70~80 meters per month up to nearly 100 meters per month.It plays a direct role in safeguarding and promoting the standard construction,improving the quality and safety of the project.
    Reflections on Green Exploration of Oil and Gas Resources
    Zhang Fuliang, Wang Chenguang, Zhao Yuande
    2020, 36(01):  7-9. 
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    Geological exploration is the upstream of the whole mining industry chain,and green exploration is a concrete action to implement the concept of green development at the source.At present,China has made a big step in solid mineral green exploration,but it is still lacking in the field of petroleum and natural gas.In order to achieve the expected target of oil and gas resources exploration under the premise of protecting the ecological environment,the innovation of oil and gas exploration methods,and the realization of green exploration.Based on the analysis of the current situation and demand of oil and gas exploration,the green exploration standards for petroleum and natural gas are initially proposed by referring to the existing standards for solid mineral exploration and the relevant standards such as technical specifications for petroleum and natural gas industry,environmental quality standards and technical specifications for environmental impact assessment.By comprehensively promoting the green exploration of oil and gas resources,we can achieve the goal of high efficiency and environmental protection in the oil exploration industry.
    Design and Application of Precise Cost Control System in Baixiangshan Iron Mine
    Liu Faping
    2020, 36(01):  10-13. 
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    As an important resource,the price of iron ore is determined by the market.Therefore,under certain conditions of price.If iron ore enterprises want to further improve their economic efficiency and enhance their competitiveness,they will mainly achieve it through cost reduction.This paper takes Baixiangshan Iron Mine as an example to realize the controllable cost control of Baixiangshan Iron Mine ore,mainly from technological innovation and production management.The methods to reduce costs mainly include:optimization of water prevention technology,adoption of safe and efficient mining technology,grading support,accurate filling of big data,research on automation technology,cost reduction of production management,cost reduction of financial revenue and expenditure management,reduction of technical management,and increase sporadic projects are selfemployed.Precise cost control system not only created huge economic benefits for the mine,but also provided reference for other mines with similar conditions.
    Metallogenic Regularity of Polymetallic Deposits in the Northern Margin of the Dahushan Rock Mass in Chongyang County
    Shi Deqiang, Yin Jin, Huang Yanhua, Li Wei, Li Quan, Nie Jincheng
    2020, 36(01):  14-17. 
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    In recent years,some new prospecting clues have been discovered in the northern margin of the Dahushan rock mass,There are deposits such as the Simenao tungsten mine,the Tichong zinc mine,the Yangjiaoguo gold deposit,and the Zhoujiaping gold deposit around the rock mass (point).In order to explore the metallogenic regularity of polymetallic ore in this area,through the mineralization geological characteristics of four deposits (points)，The metallogenic regularity is summarized from three aspects: the spatial distribution characteristics of the deposit,the orecontrolling factors and the genesis of the deposit.It is believed that the Dahushan rock mass is closely related to mineralization，providing some material sources for mineralization.The distribution of the deposit points in the area is far from the rock mass,showing a gradual process from high temperature elemental tungsten to medium temperature elemental zinc to low temperature elemental gold.
    Application of Factor Analysis in Geochemical Prospecting of the Yu'erya Gold Mine in Eastern Hebei
    GuanXiandong Qian Jianping Wang Shuo Su Te Li Yexing
    2020, 36(01):  18-23. 
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    The Yu'erya gold deposit is located at the northern margin of the North China Plate.The basement of the mining area is the granulite facies and amphibolite facies of the Qianxi Group in the Archean strata.The ore body is controlled by the NNENE fault structure and the orebearing surrounding rock is granite.Based on the geological characteristics of the deposit,using the soil geochemical data of the mining area,the traditional statistical method and cumulative frequency method were used to delineate the anomalous range of 12 elements in the gold deposit.The factor analysis method was used to distinguish the SbHgPbAs element combination and Au Ag Bi.Element combination,ZnCuSn element combination and WMo element combination; further trend analysis of factor scores,which effectively highlights deep prospecting information and more accurately circle the oreforming target area.Combined with the geological characteristics of the study area,the combination of AuAgBi element and Sb HgPbAs element is the best geochemical marker element combination in the study area.The next step of geological work should be placed in the deep part of the ore body in the mining area and the abnormally high value in the south.At the same time,a small number of projects were arranged in the northern ore belt to trace the relationship between the mine and the Tangzhangzi Gold Mine.
    Comparative Study on the Controlling Factors of Hehuashan Lead zinc Deposit and Other Deposits in Tongling Area
    Wang Yun
    2020, 36(01):  24-27. 
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    In order to explore the similarities and differences between the ore concentration factors of the Hehuashan leadzinc deposit and other deposits in the Tonglimg area, the paper uses macroscopic and microscopic combination,geological observation to study the combination of istotope geochemistry and fluid inclusion analysis, theough stratigraphic lithology, geological structure, The comparison of the source and nature of specific geological bodies and ore forming fluids with mineralization,reveals that the ore controlling factors of this new type of deposit are characterized by lowtem perature hydrothermal and breccia control that are not closely related to magma.It is concluded that this new type of deposit has the ore controlling factors of other deposits in the Tonglimg area and also has its own unique orecontrolling factors.
    Hydrochemical Characteristics and Origin Analysis of Deep Brine in Xiaoliangshan Dafengshan Area of Qaidam Basin
    Gan Huichun, Yuan Shichong,
    2020, 36(01):  28-34. 
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    There are abundant deep brine resources in XiaoliangshanDafengshan area of Qaidam Basin,but the degree of exploration is relatively low at present.In order to explore the status of brine mineral resources in the region,based on the analysis of regional geological background,the distribution of deep brine aquifers in mining area is interpreted by means of geophysical exploration wells and earthquakes,and the regional hydrogeological conditions are studied,including the occurrence conditions and distribution rules of regional groundwater,groundwater types and the division of aquifer rock groups.A set of microcemented lacustrine facies strata is exposed in the area,which contains high salinity brine,which can be divided into two basic types:fractured pore water of clastic rocks and pore water of loose rocks.The deep brine orebodies and hydrochemical characteristics are analyzed,and the deep brine is divided into five ore layers from top to bottom,all of which belong to magnesium sulfate subtype brine.Finally,the sedimentary evolution law of deep brine potassium resources is analyzed from the topographic,tectonic and climatic conditions in order to provide basic information for the deep evaluation,development and utilization of deep brine resources in Qaidam Basin.
    Geological Evaluation and Optimization of Gold Prospecting Target Area in QixiaDaliuhang Area,Shandong
    Huang Xin, Song Qian, Wang Yongjun, Shen Lijun, Xu Chang
    2020, 36(01):  35-37. 
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    The Qixia Dalliuhang area is located in the Qixia Penglai gold ore metallogenic belt in central Jiaodong.It is an important gold mineralization area in Jiaodong,and its ore forming conditions are superior.In order to optimize the classification target area,comprehensive research is carried out on the geological background,the prospecting target area evaluation and the prospecting target area optimization aspect,and the three types of prediction areas are divided according to the survey work level and the mining rights setting.Five target areas were selected for the direction of priority deployment of exploration work in the future.
    Discussion on Geological Characteristics and Genetic Types of Cement Limestone Mine in Maotouba,Lingyuan City
    Fan Jingyuan
    2020, 36(01):  38-41. 
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    The study area is located in the Sino Korean paraplatform (Ⅰ),Yanshan fold belt (Ⅰ4),West Liaoning depression(Ⅰ14),chaoyang dome fold break beam (Ⅰ1-24) within the basin of siguanyingzi～goumenzi.It is found that cement limestone deposits occur in the strata of the first and seventh member of the middle Cambrian zhangxia formation of the Paleozoic.And some layers meet the requirements of fluxing limestone.In order to find out the geological features and genetic types of the cement limestone mine of maotouba,through geological exploration and comprehensive study of previous regional data,the regional strata presents inverted anticline structure,and the ore layer is strictly controled by the stratum.The ore is gray dark gray,the natural type is gray medium thick~ thicker layer oolitic limestone ore and gray medium thick layer micritic limestone ore.Identify areas of industrial significance of fiveⅠ grade seams,threeⅡ grade seams.The genetic type of ore deposit is Marine sedimentary deposit.The oolitic limestone in the first and seventh member strata of the middle Cambrian zhangxia formation is a prospecting indicator.This is the first time for cement limestone explorationin western area of Liaoning province,It fills up the blank of looking for cement limestone in the middie Cambrian zhangxia formation in western area of Liaoning province.
    Prospecting Criteria and Geological Genesis of Hunlonghe Iron Deposit in Xinping County
    Zheng Zeguang
    2020, 36(01):  42-46. 
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    Hunlonghe iron deposit is one of the typical 'Dahongshan type' deposits in the intersection part of Honghe Fault and Lvzhijiang Fault,which regarded as the iron copper deposit that is commonly developed by lava cycle.In order to analyze the genetic mechanism of Hunlonghe iron deposit,the typical deposit geological characteristics,mineral assemblage characteristics and wall rock alteration are discussed in depth,based on the regional metallogenic background and the geological exploration results of the Hunlonghe iron deposit in Xinping county,Yunnan province.Besides that,the basic research results of the ore forming materials and ore controlling tectonic characteristics are also analyzed in detail.The results showed that:①the copper iron metallogenic belt is mainly controlled by stratigraphic harizon and sedimentary cycle,which belongs to volcanic eruption sedimentary metamorphism,and the iron metallogenic belt is mainly controlled by volacnic magma hydrothermal reformation,which belongs to volcano sedimentary reform genesis.②the structure,metamorphism and lithology lithofacies are controlled in different degree by the sedimentation/enrichment of mineralization.The basic tuffaceous schist,sodic tuff provided the abundant material source,and the deuteric hydrothermal upwelling and transported along the structures,which transformed/enriched the (mineralization) orebodies of early stages.③based on the lithologic association,wall rock alteration and structural characteristics,it is pointed out that the Manganghe Formation,sodic tuff and diabase gabbro,magma have better metallogenic potential,they can be regarded as the most favorite position for the further detailed exploration work.
    Geological Characteristics and Prospecting Criteria of Limeyaogou Iron Mine in Inner Mongolia
    Zhang Rong
    2020, 36(01):  47-49. 
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    The limeyaogou iron ore area is about 80 km away from the northwest of Chifeng City, and is located in the south side of the Xilamulun polymetallic metallogenic belt. The area is located in the contact zone between the east part of Inner Mongolia earth axis and the West Inner Mongolia sea fold belt. The third level structural unit is the northeast end of Yunwushan uplift and the boundary of the two structural units of Chifeng Mingshan fracture. The wall rock alteration of the deposit is zonal, and it is a fault and Skarn type deposit controlled by fold complex. In order to explore the geological characteristics and ore prospecting signs of the mining area, the geological survey work in this area has been summarized and analyzed in recent years. The deposit is considered to be a skarn deposit. Around the structural development position, the main prospecting target is the contact zone between the rock mass and the stratum and the adjacent area and the highprecision magnetic anomaly matching area.
    Production practice of Drilling Exploration in Tongshankou Copper Mine
    Zhu Xianyan
    2020, 36(01):  50-51. 
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    With the end of underground deep infrastructure in Tongshankou Copper Mine,there are hidden dangers of safety accidents in tunnel prospecting and the quality of geological sampling can not be guaranteed.In order to speed up the production of prospecting,give full play to the advantages of inpit drilling,make up for the shortage of tunnel prospecting,three inpit drills have been purchased for prospecting.The results show that the drilling in the pit has the advantages of flexible operation and maneuverability,easy to master,shorten the production prospecting time,save the prospecting cost and the safety of the operation site,and maintains the dynamic balance of the third grade ore quantity,and ensures the sustainable production by using the application of the main orebody production prospecting and the surrounding literacy and storage increase,the pointed out orebody exploration edge mapping,the sporadic small orebody pursuit,the advance water exploration,and the guidance of roadway heading direction,etc.,which shortens the production prospecting time,saves the prospecting cost and the safety of the operation site,and maintains the dynamic balance of the tertiary ore quantity.Steady production and development.
    Characteristics of Coal Gas Formation and Utilization Potential of Key Blocks in Hunan Province
    Long Xinliang
    2020, 36(01):  52-55. 
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    The high gas (prominent) mining area in Hunan Province is selected,its geological background,sedimentary environment and cosedimentary structure during coal accumulation are analyzed,combine coalforming gas accumulation conditions,gasbearing properties and physical properties of coal reservoirs are discussed,and coalderived gas resources is identified.The selection of favorable blocks for surface extraction is done and its applicable conditions are studied,the determination of key extraction blocks is done,the development of coalderived gas extraction mode and development and application planning in high gas mines are conducted,so as to provide theoretical basis and development and utilization direction for coal gas exploration and utilization in Hunan Province.
    Tectonic Evolution Characteristics Since the Pleistocene in the Northern Margin of Nanyang Basin
    Chao Hongli, Fang Huaibin, Wang Liulin
    2020, 36(01):  56-58. 
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    Nanyang Basin is a fault basin that has been continuously developed since the late Cretaceous.Through the study of boreholes and river terraces in Nanyang Basin,combined with the ESR dating method,the tectonic evolution of the northern margin of Nanyang Basin since the Pleistocene has been analyzed.The results show that the alluvial deposits in the study area are mainly composed of Holocene,Upper Pleistocene and Middle Pleistocene,which constitute the Grade I,II and III terraces of Tuanhe River;since Middle Pleistocene,the vertical movement of the study area is more obvious,and the depression of the Tuanhe River is very strong,the structure of the multilevel terrace reflects the overall continuous erosion process since Middle and Late Pleistocene,and it shows unevenness in time and space,tts undercut rate slows down from slow to fast and then to slow again.
    Optimization on the Prospecting Method of SnW Polymetallic Deposit in the North Section of Fanlongdui in Chenzhou City,Hunan Province
    Liu Haihong, Wu Zhihua, Lu Xihong, Qin Qinghuan
    2020, 36(01):  59-62. 
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    SnW polymetallic deposit in the north section of Beilongdui in Chenzhou City,Hunan Province is loacated in Dongpo Ore Field in WSnMoBi polymetallic metallogenic belt in Southern Hunan Province,the metallogenic geological conditions prospecting prospective of the mining area are both good.Based on the geological characteristics of the deposit and the existing prospecting results,the geological characteristics of the main orebodies such as No.101、No.102、No.103 orebodies are discussed.Based on the above discussion results,the optimization method of the layout of prospecting engineerings during the exploration process of fissure filling veined belt type SnW polymetallic deposit are analyzed.The optimized method can be summarized as:①the prospecting engineering should not be controlled by each ore belt alone,the ore hosting layer should be controlled by prospecting engineering overally;②continuous sampling of lithologic sections containg toxic sand,tin and tungsten veins should be conducted,it can not only avoid ore leakage,but also provide direct basis for redelineating orebodies after adjusting industrial indexes in the future.
    Key Issues and Solutions in Mineral Resources Reserves Report Writing
    Liu Tiegang
    2020, 36(01):  66-69. 
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    With the further development of China's market economy and the government decentralization in full swing,Mineral resources reserves report review filing requirements have changed greatly.With our current mining administration departments on the relevant requirements of mineral resources reserves report written and Some of the practical problems encountered in the review for the record and report,The article has carried on the induction and the summary of relevant problems should be noticed in the written report of mineral resources reserves,The purpose is to improve the reporting of mineral reserves in our province the writing quality and provide the reference.
    Consideration on strategic reserve of mineral resources in GanSu province
    Liu Tao
    2020, 36(01):  70-72. 
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    Mineral resources reserve is a long-term guarantee for national security and economic development.The objects of reserve includes short supply of minerals and dominant minerals,and the forms of reserve can be divided into products reserve,origin reserve and exploration area reserve.Mineral resources reserve can promote the sustainable development of economy and society in gansu province.
    Crossmining Technology of Doublelarge Roadways and Analysis of Supporting Effect of Roadway Reinforcement in Huaheng Mining
    Cao Shuliang, Yang Lin, Chen Jian
    2020, 36(01):  73-76. 
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    In view of the situation of crossmining roadway in Huaheng Mining Co.,Ltd.in the later period of mining,taking the west wing roadway and the west wing total return airway of 61103 outer working face as examples,the propagation law of the advance support pressure in the floor rock stratum is analyzed.Combining with the geological data of double roadways,the highstrength anchor cable (anchor bolt) beam and pressure net are put forward.Reinforcement scheme of combined support,Ushaped shed and steel shed support.According to the monitoring results of deformation of surrounding rock of roadway,roadway reinforcement increases the strength of roof support,makes the supporting points of roadway force act on the two sides,resulting in the displacement of the two sides of roadway,and the concentrated stress of surrounding rock of roadway propagates to the floor of roadway,resulting in floor heave phenomenon,and the roadway reinforcement support mode and support parameters are reasonable.
    Study on Technology of Pillar Setting in High Stress Concentrated Area of Fully Mechanized Caving Island Coal Face in Deep Inclined Coal Seam
    Song YangshengLi Chenghai
    2020, 36(01):  77-82. 
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    Pangpangta Mine 5107 as an island fully mechanized caving face,mining is very difficult.How to recover resources safely and maximally is a problem that needs to be solved.For this problem,Pangpangta Coal Mine has carried out special coal pillar setting technology research.Through the strength test of surrounding rock,the size of coal pillar is determined by theoretical analysis and numerical simulation,which meets the requirements of mining,and more than 220 000 t of coal resources are recovered.
    Summary of Underground Support Scheme in Erlihe Leadzinc Mine
    Zhao Linhai, Li Zongli, Wang Zheng, Zhang Shaobo
    2020, 36(01):  83-86. 
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    In order to summarize a set of support schemes suitable for the actual mine,More than 20 years of mine production in Erlihe Leadzinc Mine,various support technologies have been introduced for testing.According to the engineering environment of mine roadway and chamber,the scheme of single or combined support of bolt,steel bar,steel frame and concrete is determined,especially the support mode and parameters of hoist chamber with 12.4 m span in phyllite.It has reference value for the support of largespan chamber engineering in weak rock stratum of mine.According to the example of phyllite support in the upper wall of steeply inclined and gently inclined orebodies,the engineering schemes of bolt,bolt and cable support are listed respectively.The temporary support of pillars and crossbeams is used in the areas of stope connection roadway and mining room pedestrian passage.It not only improves the safety of stope operation,but also reduces the mining loss rate by 5% and the dilution rate by 7%.
    Safety Pillar Design in Zhongjiu Iron Minewith Waterrich Clastic Rock Roof
    Zhou Lei, Zhu Xiaolong
    2020, 36(01):  87-89. 
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    In order to ensure the safe mining of Zhongjiu Iron Mine,according to the hydrogeological engineering geological conditions and mining methods of Zhongjiu Iron Mine,the height of waterconducting fracture zones,the reasonable thickness of waterproof pillars and its location are analyzedand calculated by theoretical analysis and numerical simulation.Moreover,combining the hydrogeological characteristics and development depthof Quaternary aquifer in Zhongjiu Iron Mine ,the disturbance boundary of overburden in waterrich orebody mining in ZhongjiuIron Mine is calculated.
    Exploration on Coupling Mining Method Lowpoor Segmentation and Shallow Hole Retention in Tongchanggou Copper Molybdenum Deposit of Yunnan Province
    Mei Shehua, Li Zhenhuan, Zhang Changzhen, Chen Jianhang
    2020, 36(01):  90-92. 
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    Most of the mining areas are fractured,mediumthick and steeply inclined skarntype coppermolybdenum ore bodies.The original design adopted upward horizontal slicing and filling mining method.There are some defects in mining experiments,such as poor operation safety,low labor productivity,large loss and dilution,and high mining cost,which seriously restrict the organization of trial production.Mine urgent need for a safe and efficient mining method meet the trial production,cost can control ore continue to supply.Through full study,the author puts forward the idea of coupling mining method of lowloss sublevel caving and shallow hole shrinkage,which further reduces the safety risk,simplifies the process,and controls loss dilution.Through the optimization design of mining methods,the practical problems existing in the production of enterprises are solved,the mining efficiency is improved,and it has certain reference significance for other similar mines.
    Simulation Study on Movement Law of Overburden Strata in Fully Mechanized Top Coal Caving Mining
    Zhou Xiang, Qi Hongjun, Zhang Duxue, Gao Wen, Zhang Yanxu, Jian Yong
    2020, 36(01):  93-96. 
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    In order to study the law of overburden movement during the mining process of the new type of fully mechanized top coal caving mining face,the 42105 working face of Qinggangping in Xunyi,Shaanxi Province is used as the engineering background,and the numerical simulation analysis method is used to simulate the two ends of the head filling with 5 m respectively.The migration law of overlying strata under the width of 10 m and 20 m filling body shows that with the increasing filling width of the tip,the proportion of filling area to the total length of the working face is increasing,and the range of stress arch formed by the filling part is expanding continuously;When the width of the tip filling is small,the stress arch formed by the fallen area is dominant,and the height of the overlying arch shell is high.
    Analysis on Reasonable Retention and Setting of Coal Pillar in Roadway of Thick Layer Expansive Mudstone Roof
    Yu Shiqin
    2020, 36(01):  97-100. 
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    In view of the problems in the determination of the size of small coal pillar along the hollow excavation roadway of thick layer expansive mudstone roof roadway in wangjialing coal mine,theoretical analysis and numerical simulation analysis are adopted in this paper.The theoretical calculation shows that the distance between the boundary coal body in the goaf and the fracture location of the basic roof in the goaf is 10.47 m.Numerical simulation results show that the maximum vertical stress concentration coefficient of coal body in goaf can reach 1.94,and the vertical stress value of coal body in goaf reaches 14.58 MPa within 5.5~10.5 m from the lateral coal wall.Considering the low strength of coal seam on the working face and the thick layer of expansive mudstone on the roof,5 m coal pillar was set for the working face.The results can not only optimize the bearing stress distribution of working face,reduce the difficulty of surrounding rock support along hollow excavation roadway,but also improve the coal mining amount and reduce resource waste.
    Blasting Design and Hole Distribution of Openpit Mine Based on GPS Technology
    Ding Zhongyi, Zhang Bo, Hao Lijun
    2020, 36(01):  101-103. 
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    In view of the hole layout mode and drawbacks of an open pit iron mine,GPS technology was introduced and applied to mine blasting design and hole layout,and field experiments were carried out.The results show that using GPS technology to distribute holes can greatly improve the layout accuracy of holes,and the operation is simple.The work efficiency is also greatly improved compared with before.It meets the requirements of fine blasting in mines and improves the final blasting effect.According to field statistics,the final blasting block rate is reduced by 40%,and the waiting time for processing blocks is reduced,which meets the requirements of mining and assembling in open pit mines and achieves good economic benefits.
    Analysis of Relationship Between Support Resistance and Coal Wall Failure in Thin Coal Seam with Hardpacked Gangue
    Guo Jianfei
    2020, 36(01):  104-106. 
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    In view of the problem of hard gangue sandwich mining in thin coal seam,this paper puts forward the idea of reasonably using the support pressure of working face to destroy gangue sandwich,and analyzes the influence of support on overburden movement.It is concluded that the stronger the support force is,the better the support force is.The minimum support strength required for roof safety control of stope is calculated to be 0.33 MPa.Based on this,the minimum working resistance of each support is calculated to be 2 200 kN.Finally,the evolution characteristics of support pressure distribution parameters in front of the coal wall were simulated when the support adopted different working resistances,and the influence of the working resistances of the support on the destruction of gangue was analyzed.When the working resistance of the support is 2 200 kN,the vertical stress peak reaches 29.214 MPa,and the destruction depth of gangue lost reaches 0.7 m,which is greater than a cutoff depth and can effectively improve the coal cutting efficiency.
    Complexity Analysis of Residual Ore Body Recycling in Xiaochangba Leadzinc Mine
    Wang Chengcai
    2020, 36(01):  107-109. 
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    The residual ore body in the Xiaochangba mining area was complicated in conditions and the ground pressure activity was fierce,which created great difficulties for the safe recovery of the residual ore.In order to safely recover the residual ore body of the 65~71 line in the Xiaochangba mining area,the statistical analysis of the residual ore volume in the area was first carried out,and the spatial distribution characteristics of the residual ore body were mastered.The stress state of the residual ore body before and after mining was analyzed by numerical simulation.The analysis results show that after the recovery of the residual ore,the empty area is basically in a stable state.
    Research on the Mineral Stoping of ore Body and Ore Pillar Under Big Goaf
    Cao Wanbao, Zhang Chunpeng, Wu Heping
    2020, 36(01):  110-112. 
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    A large goaf has been formed in the mine due to the long times of the open field stoping,which brings safety hazard to the mine safety production.Aiming at this problem,this paper analyzes and studies the mining method of ore body under the empty area by considering the occurrence of ore body,the technicaleconomic conditions of mining and the characteristics of empty area and provides two mining schemes:Open field backfill method and backfilling and upward horizontal slicing and filling methods.Considering the actual situation of the mine,Open field backfill method is better.However the situation of the empty area of the mine is not optimistic,it is necessary to fill the empty area in time.
    Grey Correlation Analysis of Factors Affecting Blasting Quality in a Mine
    Du Xiangkuo
    2020, 36(01):  113-116. 
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    In order to analyze the factors that influence the quality of middle and deep hole blasting in a mine,grey correlation theory is adopted in this paper to rank the factors that influence the quality of blasting according to the principle of advantage analysis.According to the mine production experience at home and abroad and the actual production of a mine,to determine the influence degree of the influence factors on blasting quality from high to low in order for the specific charge,the minimum resistance line,hole spacing,hole density coefficient,thus determine the key factors influencing the blasting quality of specific charge,the minimum resistance line and the bottom of the hole.Based on the actual production,the reasonable value range of explosive unit consumption is selected as ［1.42.0］,the reasonable value range of minimum resistance line is 2.0~ 2.4 m,and the reasonable value range of hole bottom distance a is 2.0~ 2.8 m.
    Mechanical Analysis of Pillars in Discontinuous Goaf Based on FLAC3D
    Li Guang, Zhang Jun, Wang Shaorong, Ren Hailong, Zhang Hongchang, Li Guanghui, Sun Yuchao
    2020, 36(01):  117-119. 
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    In order to discuss the mechanics of pillars in discontinuous goafs,FLAC3D numerical simulation technology is used to analyze the stress state of the ore pillar in the discontinuous goaf formed by the horizontal slicing and filling mining method.The research shows that the force of the ore pillar in the discontinuous goaf is mainly affected by the dead weight stress of overburden,and the horizontal stress has little influence on it.And with the increase of the buried depth,the vertical force on the pillar increases approximately in a straight line.As the span of discontinuous goaf increases (the number of approaches increases),the stress in the vertical direction of discontinuous goaf gradually transits from both sides of surrounding rock to the middle of ore pillars.
    FSS Grouting Reinforcement Method for Inorganic Chemical Material of Broken Coal Body
    Liu Fuju, Han Bing
    2020, 36(01):  120-122. 
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    In order to solve the problem of instability of working face caused by coal body breakage in roadway,the author used inorganic chemical material FSS to carry out grouting reinforcement experiment on coal body.The results show that FSS has high compressive and shear strength and good grout permeability after bonding with coal and rock mass.It can penetrate into the cracks of coal and rock strata very well.When the spacing of grouting holes is 1.5 m,it can achieve good filling and reinforcing effect.The crushed coal in 1501 working face is strengthened by FSS,which greatly improves the integrity and stability of coal body,reduces the possibility of roof fall accident in working face and guarantees the safety of workers on site.
    Characteristics of Secant Modulus of the Blockstone Tailings Cemented Backfill
    Xue Weishi, Li Xingshang, Lan Jiquan
    2020, 36(01):  123-124. 
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    In order to study the influence of the ratio of block tailings on the secant modulus of the blockstone tailings cemented backfill,the specimens with different ratio of block stone tailings were prepared,and the characteristics of secant modulus of the blockstone tailings cemented backfill were analyzed.The results show that the secant modulus of filling body increases firstly and then decreases with the increase of the ratio of block tailings.When the ratio of block tailings is 7∶3,the secant modulus of the blockstone tailings cemented backfill reaches the highest.Afterwards,the secant modulus of filling body begins to decrease with the increase of the ratio of block tailings.When the ratio of block tailings is less than 7∶3,the relationship between secant modulus enhancement factor and the ratio of block tailings shows an exponential function.
    Application of Expansible Advance Support in Coalfree Pillar Face
    Wang Hairui
    2020, 36(01):  125-128. 
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    In view of the phenomenon of roof subsidence, fracture and breakage in the advanced influence area of gobside entry retaining section in the mining process of 9204 roofcutting and pressurerelief coal face in Dianping Coal Mine, the traditional hydraulic single pillar support not only has high labor intensity and low automation level, but also is easy to deform and pressurerelief of single pillar, which reduces the roof.The support effect seriously affects the safe and efficient mining of coalfree face.To this end, a set of retractable advance support is designed through technical research and applied in practice, which solves the technical problems of poor support effect and difficult headlamp, and makes the roof subsidence below 0.12 m,and achieves remarkable application results.
    Blasting Data Informatization in Blasting Management
    Li Lanbin
    2020, 36(01):  129-132. 
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    In view of the problems existing in the blasting management of open pit mine,the paper summarizes and refines the daily blasting management of mine,and establishes the blasting information management system of open pit iron mine.The system includes four parts: basic data statistics system,bonus distribution system,technical and economic index calculation system and blasting design system.Through the informationization of blasting management,the blasting analysis is more timely and accurate,the bonus distribution is more fair and reasonable,and the quality and efficiency of blasting technicians are greatly improved.Finally,a good situation of blasting control efficiency,basis and steady improvement of blasting quality is formed,which is of great significance to improve the efficiency of blasting management.
    Study on Strengthening Technology of Slag Concrete in Soft Rock Floor of Yangchangwan Coal Mine
    He Weisheng, He Chengqian, Hou Shuhong, Zhang Fuyu, Jia Chuan
    2020, 36(01):  133-134. 
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    In order to improve the strength of soft rock floor for large vehicles such as trackless rubbertyred vehicles,combined with the geological conditions of soft rock floor of 16206 machine roadway in Yangchangwan Coal Mine,the slag concrete floor reinforcement technology was studied,the reasonable mix scheme was determined,and the concrete floor was laid in the machine roadway site.The research and application results show that the slag concrete floor strength can meet the needs of continuous transportation of large vehicles,greatly improve the bearing capacity of the floor,prevent floor heave,and provide a basic guarantee for continuous transportation of longdistance roadways.
    Research on the Optimization of an Iron Mine Development Transport System
    Li Yanfei et al
    2020, 36(01):  137-138. 
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    Experimental Study on Washability Test of a Submarine CuS Ore
    Wang Zhouhe, Pang Bo, Ding Peng, Peng Shizhong, Guo Yunxin
    2020, 36(01):  145-147. 
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    In order to determine the suitable technological conditions and reagent system,an experimental study on a submarine ore with 9.80% Cu and 44.24% S was conducted.The final closedcircuit test results showed that the copper concentrate contained 21.42% copper,the copper recovery rate was 8842%,the sulfur concentrate contained 5141% sulfur,0.718% copper,and the sulfur recovery rate was 5667%.The technological process and reagent system are reasonable,and the ore processing index is stable,which provides a research result with wide application for comprehensive recovery of copper and sulfur resources for this type of ore.
    Optimization of Copper Flotation Process in a Copper Mine in Jiangxi
    Zhang Ying, Peng Huiqing, Luo Mulin
    2020, 36(01):  148-151. 
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    A copper ore in Jiangxi is affected by the increase of copper oxidation rate.The production index of the ore dressing plant is not ideal.In order to solve the problem of unsuitability of the onsite process,the ore dressing test was carried out on the basis of the new collector W1.The results show that the oreground to grinding fineness of -0.074 mm 64%,via two roughing two scavenging,+0.074 mm in coarse concentrate reground to -0.074 mm 96.5% and mixed with undersize via one roughing three cleaning two scavenging process,a copper concentrate with copper grade of 19.38% and copper recovery of 7384% was obtained.
    Continuous concentration test of sulfur crude concentrate in a processing plant of tongling nonferrous metals
    Dai Xianren, Wang Zhouhe
    2020, 36(01):  152-155. 
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    The sulfur minerals in a concentrator of TNMG are mainly pyrite and magnetite.Sulfur concentrate after re-selected in the production.It is difficult to meet the 90% target for total sulphur plus iron in sulfur concentrate.Sulfur concentrate after burning acid to obtain low grade of red powder iron,added value is not high,seriously affect the economic benefits of enterprises.n order to improve the quality and reduce impurities of sulfur concentrate,according to the good floatability of pyrite.Magnetic yellow iron has poor floatability and weak magnetic properties,Step by step flotation process was adopted in the laboratory.In other words,the process of recovering pyrite with good floatability is given priority,and the process of recovering pyrite with floating tail magneto-flotation is realized,which realizes the efficient recovery of pyrite and pyrrhotite.In order to further verify the rationality of the fractional flotation process,a part of sulfur crude concentrate pulp was separated on site for continuous separation test.The total sulfur concentrate obtained by continuous separation test contained 46.31% sulfur,91.60% total sulfur plus total iron,and 80.28% sulfur recovery.The sulfur concentrate in the test site contains 39.67% sulfur,80.52% total sulfur plus total iron,and 73.94% sulfur recovery.The total sulfur and total iron content of sulfur concentrate was 11.08 percentage points higher and the sulfur recovery rate was 6.34 percentage points higher.The results of continuous selection test provide the technical and theoretical basis for the reselection process of crude sulfur.
    Intelligent Technology of Fully Mechanized Mining Face in Chezhai Coal Mine
    Zhang Yanjun
    2020, 36(01):  164-166. 
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    In response to Jingcheng Anthracite Group Company's call to realize the smart mine,fully implement the important measures for the transformation and development of the group company,and truly realize the concept of "one mine,one policy and one model",the fully developed underground fully mechanized mining face in the Chezhai Mine,fully integrated.The actual situation of the Chezhai Mine,adhere to the principle of overall planning,unified standards,and stepbystep implementation.Based on the current technical level,the relevant technical work of intelligent fully mechanized mining face should be carried out according to local conditions,and the intelligent technology of fully mechanized mining face should be used to reduce Cost,reduce the labor intensity of personnel,improve the efficiency of equipment use,promote the realization of intrinsic safety,and improve the management level of enterprises.It plays a very important role in safeguarding.After careful planning and fine implementation,the Chezhai Mine becomes a business informationization,scheduling visualization,and decisionmaking.Intelligent and advanced intelligent mines.
    Application of Slope Deformation Monitoring Radar in the Slope Safety Monitoring of Anjialing Open Pit Coal Mine
    Wang Yantao, Deng Zengbing, Zuo Ronghu
    2020, 36(01):  167-171. 
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    In order to improve the recovery rate of Anjialing Openpit Mine,it is planned to organize mining operations at the northern end of the mine.In order to strengthen the monitoring work of slope during the mining of steep slope,to ensure the stability of slope and the safety of personnel,the radar monitoring system of synthetic aperture interferometer slope is introduced in anjialing openpit mine.By studying the principle,technical characteristics and system structure of synthetic aperture interferometric slope radar,the monitoring data of slope during steep side mining was analyzed,and the deformation area of slope was discovered in time.The results show that the radar can realize the large range and high precision realtime automatic monitoring of the slope of the openpit mine and meet the requirements of the slope monitoring of the openpit mine.
    Application of Mechanical Chain Damper in Tonglushan Mine
    Xiong Guoxiong
    2020, 36(01):  172-173. 
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    In a complete ventilation system,the damper is one of the more indispensable ventilation structures,which has the function of controlling,guiding,regulating the system and the middle part of the airflow.With the increasing production tasks in the Tongluoshan Mine,the production area has also increased,and the wind current is shortcircuited and the series connection is serious.In order to solve this problem,a mechanical interlocking damper is introduced to block and regulate the wind flow,and reduce the short circuit and series phenomenon of the wind flow.The practical application shows that the damper is applied well under the Tonglushan mine,which can greatly reduce the occurrence of shunt short circuit and series phenomenon,and has good effects on reducing mine ventilation energy consumption and improving overall ventilation efficiency.
    Dmine 3D Modeling and Application in a Tailings Depot
    Zhang Yang et al
    2020, 36(01):  174-175. 
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    Study on Automatic control system of grade and particle size of iron ore
    Li gang, Li tao
    2020, 36(01):  176-178. 
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    The grade and particle size of an iron ore are always operated manually.There are some problems in index adjustment,such as lag,poor accuracy and low stability.Combined with the next process pelletizing plant put forward the goal of 90% grade stability of iron concentrate and 95% particle size stability of concentrate,carried out the research on automatic adjustment of concentrate grade and particle size,and established three automatic control systems matching the grade of concentrate with the washing magnetic separator,the grade of concentrate with the high frequency vibrating screen,and the size of concentrate with the first and second section flow.The test results show that the grade stability of concentrate increases from 77.36% to 92.74% after manual operation by 15.38 percentage points.The stability rate of concentrate particle size increased from 83.15% to 96.83%,which increased by 13.68 percentage points,Achieved the expected target,met the pelletizing plant raw material demand.
    Exploration and Research on the Remote Control System of Grab Crane
    Zhang Bing
    2020, 36(01):  179-181. 
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    Anhui Development Mining Co.,Ltd.Automatic Upgrade Transform
    Huo Binjie
    2020, 36(01):  182-183. 
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    Practice of Technical Transformation of CH870 Cone Crusher
    Luo Min
    2020, 36(01):  184-185. 
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    The Preventive Technology of Device Tripping Caused by Thunder-Induced Voltage Sag and Its Application
    Jiang Jinfa, Yuan Zhizhong
    2020, 36(01):  186-188. 
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    Discussion on the Design of Power Supply and Distribution of SemiContinuous Process in Gaocun Opencast Iron Mine
    Chen Xiaowen
    2020, 36(01):  189-190. 
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    Introduces several problems that need to be paid attention to in the design of power supply and distribution of semicontinuous process in opencast iron mine,including the classification of power load,selection of distribution voltage,system earthing type,layout of power transformation and distribution,etc.
    Safety and Reliability Analysis of Buildings in the Range of Surface Movement Zone
    Gong Qinglong, Xiong Xianliang, Li Xiaogang
    2020, 36(01):  191-193. 
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    Surface buildings and structures located within surface mining movement in producing mines.If the safety and reliability of buildings and structures are judged according to general principle of delineating the range of surface movement,the result is unsafe or security pillars are reserved to ensure safety.To analyze the safety and reliability of buildings in the range of surface movement zone,using FLAC3D establish numerical simulation model and study the surface movement of mining area,also combining with the damage grade evaluation criteria of building,the results could be reasonable,which has a certain reference for similar conditions mines.
    Technical Reform of Ventilation System in Southwest Wing of No.18 Line of Hongling Mine
    Xia Gongze, Li Yongxin, Wang Yong, Xu Kuo, Sun Qinghao, Han Xiaoli
    2020, 36(01):  194-196. 
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    Aiming at the problems of imperfect ventilation system, insufficient air volume and dirty air not being discharged in time during the mining process of the southwest wing orebody on the 18th line of the mine, three feasible ventilation schemes have been worked out by using the principle of air pressure balance, network optimization technology, optimization technology of air station and computer network simulation technology. Through technical and economic comparison, on the basis of making full use of existing ventilation facilities and ventilation shaft and roadway engineering, a new 905~855 m return air shaft (1.5 m) along 18 lines and a new K45612 fan (18.5 kW) at 855 m level in this well are determined to improve the working environment in this area. The numerical simulation results show that the total air volume of the southwest wing ventilation system of line 18 reaches 20.5 m3/s, and the adjustability and stability of the underground air flow are enhanced, which provides a strong guarantee for the safe production of the mine.
    High Density Resistivity Method for Landslide Stability Analysis
    Xu Qiye, Chen Tingfang, Du Xiaochen, Chen Guoxin
    2020, 36(01):  197-200. 
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    Landslide is a kind of natural disaster with a high incidence,which will have a certain threat to engineering buildings and nearby residents.In the field of Landslide Exploration,highdensity electrical method has important application and high application value.The advantages of this method are high exploration accuracy,convenient operation and low cost.It has been widely used for many years.To analyze the stability of landslides by highdensity electrical method.The method is applied to the investigation of Houshan slope in Shuping Township,and on the basis of drilling verification,the thickness,sliding surface and property of the sliding body are analyzed,and then the stability of the slope under various preset working conditions is discussed by the limit equilibrium analysis method.The results of stability evaluation can provide support for the subsequent landslide treatment and response.
    Gas Control Technology of Fully Mechanized Caving Face on Predrainage of Coal Seam
    Li Weigang
    2020, 36(01):  201-203. 
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    In order to maximize the effect of predrainage in this coal seam,this paper takes Malan Coal Mine as the research object,aiming at the gas occurrence situation in Malan Coal Mine and the drainage measures adopted at this stage,explores the hole diameter,hole depth,layout,sealing quality and increasing coal seam permeability of drainage boreholes.Practice shows that the above methods can be used effectively.To improve the predrainage effect of coal seam and ensure the safe production of working face.
    Discussion on Acid Mine Waste Water Treatment Process in Metal Mine
    Zhu Aiping, Tian Huwei
    2020, 36(01):  204-206. 
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    Application of VR technology in mine safety training
    Huang Xiaoyan, Wang Yongsong
    2020, 36(01):  207-208. 
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    Taking the application of VR technology in safety training of Zijinshan gold and copper mine as an example,this paper introduces the practice of VR technology in mine safety protective equipment training,safety awareness training,emergency rescue training,operation specification training,etc.,and evaluates the training effect.It shows that VR technology is an effective training method in mine safety training.
    Overview of Application of Modern Measurement Technology in Mining Engineering
    Yang Liang
    2020, 36(01):  211-212. 
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    Application of Penetration Error Prediction in Deep Mine
    Zhang Jianqiang
    2020, 36(01):  213-214. 
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    On Strengthening the Construction of Coal Mine Emergency Management System
    Li Yuefei
    2020, 36(01):  217-218. 
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    Overview of the Status and Development Trends of Coal-field Geological Exploration
    Zhang Tingjuan
    2020, 36(01):  219-220. 
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    Research and practice on shut-in technology of green cycle and sustainable development
    Xu Feng
    2020, 36(01):  221-222. 
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    in order to achieve safe and efficient mine closure,wolong lake coal mine learned from the previous experience of shutting off the productive mine,innovated a new mode of safe and efficient shut-in and implemented the technology of gas extraction and utilization.The mine pit after shut-in,keep the underground ventilation,drainage,gas drainage and the operation of the gas power plant,gas drainage feature vector to generate power,realizes the self-provided power plant capacity and the underground ventilation,drainage,gas drainage,power consumption self-sufficiency,green recycling and sustainable development in the future according to capacity policy situation,for the remainder of wolong lake coal mine exploitation of coal resources.It has outstanding advantages in equipment disposal,gas management,resource reserve,late mining and personnel placement.It is technically feasible,economically reasonable and has controllable safety risks.It is conducive to comprehensive utilization of resources and coal resource reserve and will produce significant economic and social benefits.
    Problems,Analysis and Countermeasures in Coal Mining Engineering
    Si Mengfei
    2020, 36(01):  223-224. 
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    Application of LPPC Separator in Tonghui Mining Concentrator
    Yang Yunpeng
    2020, 36(01):  225-226. 
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    Optimization Practice of Grinding Separtion System of Middlings in Nanfen Concentrator
    Li Yong, Han Shuang
    2020, 36(01):  227-228. 
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    Study on the industrial test of magnetic suspension machine in masteel baixiangshan selection plant
    Zhang Guichan, Qian Shihu
    2020, 36(01):  229-230. 
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    Comparison of Advantages and Disadvantages between Mobile Crusher and Fixed Crusher
    He Xingqing
    2020, 36(01):  231-232. 
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    Application and Optimization of Upward Drift Stoping with Backfill in Zhenbei Iron Mine
    Tian Zhan, Li Hongtao
    2020, 36(01):  233-234. 
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    An Overview of the Green Construction Scheme for Sareke copper Mining Area
    Sheng Hongguang
    2020, 36(01):  237-239. 
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    Under the guidance of the national policy on constructing green mines,since the beginning of exploiting Sareke copper deposit we have practised the green developing principle that green mountains and clear water are equal to mountains of gold and silver.Centering on the seven aspects of environmental construction,multipurpose use of resources,innovation in science and technology,digitalization of the mine construction,economizing on energy and decreasing emission,environmental protection,the recovery and harnessing of the geological environment,and the three aspects of land reclamation,harmonious community and the construction of enterprise culture,we push ahead with the construction of the green mining area.Not only social efficiency and economic efficiency but also the development of mining enterprise and people's willingness in mining area are equally emphasized,which has led to the exploitation of resources harmonizing with the environmental protection,and healthy and sustainable development of the enterprise.The result of the construction is remarkable,thus accumulating rich experience in the green construction of the mining area for the sector of nonferrous metals.
    Study and Application of the Capacity of the Release Mill in the Concentrator
    Wei Jianmin, Zhu Tao, Zhao Yongcheng
    2020, 36(01):  240-242. 
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