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    15 June 2017, Volume 46 Issue 06
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    Research Progresses on Discontinuity Shear Strength Model of Rock Mass
    CHEN Shi-Jiang, WANG Chuang-Ye, WANG Chao, CHANG Jian-Ping
    2017, 46(06):  1-7. 
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    Discontinuity shear strength is one of the most important mechanical properties of structural surface.Nearly half a century，scholars in the field related to the subject have researched deeply and achieved fruitful results.First，the status quo model of structural shear strength is summed up and the characteristics of each model are described.And then，the each model from the essential characteristics，practicality and focus of shear strength are analyzed and evaluated.Finally，it is believed that ①the morphology of structure surface，which is an important factor affecting shear strength，is most complex and most difficult to be quantified.So，in the characterization of anisotropy of structure surface，a lot of research works remain to be done.②The reasonableness of the parameters of anisotropy and size effect about structural surface is required to verify by mechanical testing.The application of 3D printing technology can effectively solve the difficulty that the rock mass structural plane can not be tested repeatedly.It is expected to make a breakthrough in the field of anisotropy and size effect about structural plane; ③Anisotropy and size effect of discontinuity shear strength should be studied by dialectical thinking.In this way，the model can help to accurately estimate the engineering shear strength of rock mass.
    Optimization of Mining Method Based on Game Theory and Improved TOPSIS
    LIU Heng-Liang, ZHANG Qin-Li, RONG Shuai
    2017, 46(06):  8-13. 
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    In order to solve the mining technical problems of ore stoping under the broken rock of a gold mine,based on the game theory and TOPSIS method,the comprehensive evaluation index system based on game theory and TOPSIS method is proposed,so as to conduct comprehensive evaluation of the four alternative mining methods.The comprehensive evaluation index system of mining method including the index from the aspects of technical,economical and safety is established,the comprehensive weight values of the indexes are obtained by using game theory based on the determination of subjective and objective weight values by using analytic hierarchy process and information entropy theory.In order to avoid the problem of taking euclidean distance as the calculation program to obtain the positive ideal solution of closeness to distinguish difficulty between the quality of schemes existed in traditional TOPSIS method,the traditional TOPSIS method is improved by replacement of euclidean distance with vertical surface distance and using orthogonal projection method to calculate the closeness of traditional TOPSIS method,the vertical surface solutions of the four alternative evaluation schemes to positive ideal solutions are calculated,the results show that d1=0.114、d2=0.072、d3=0.016、d4=0.045,which further indicated that the ultimate optimization mining method is pillar-less shallow hole shrinkage stoping with subsequent backfilling method.
    Causes and Preventive Measures of Pushing-wall Accident by Sublevel Caving Mining Method
    WANG Rui
    2017, 46(06):  14-17. 
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    The pushing-wall accident caused by the medium-deep hole blasting is one of the common accidents in the mines the sublevel caving mining method is adopted.The occurrence of the accidents not only lead to process difficulty,but also increased the large rate,which affect the stope regular production.In order to solve the above problems effectively,according to the fan-patterned hole blasting physical simulation test results,the influence of charge structure to the blasting direction is discussed,and the internal mechanism of the rock mass broken by fan-patterned medium-deep hole blasting is revealed,besides that,the fundamental causes of the formation of pushing-wall accidents are discussed.Based on the above analysis results,the determination method of reasonable charging coefficient and charge structure of fan-patterned hole is proposed.The application results show that the method proposed in this paper is help for avoiding the formation of pushing-wall accidents,and it is also conducive to reducing the large rate remarkably.
    Ore-blending Optimization Via Collaborative Mining of Multiple Mining Areas in Open-pit Mine
    YANG Chi, WU Jian-Sheng, GUO Lian-Jun, XIONG Hong-Qi
    2017, 46(06):  18-23. 
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    The optimized ore-blending model via collaborative mining of multiple mining areas in open-pit mine is proposed in accordance with the scientific requirement of ore-blending of Anqian Mining Co,.Ltd..taking the Anqian mine as the study example,combing with the actual natural environment and production restrictions,based on the mine basic information (such as the grade distribution etc.) of every mining areas,the 3DMine software and linear programming simplex big M method are adopted to testify the practicability of the ore-blending optimization model.The test results show that:the output ore grade of ore crushing plant is stabilized within the requirements scope to keep stable of the milling grade of beneficiation plants.Therefore the ultimate goals of improve production efficiency,reducing production cost,improving the production capacity of mineral processing flow and related facilities can be realized effectively.The above analysis results in this paper can provide some reference for the scientific production of mines.
    Study of the Axial Expansion Behavior of Soundless Cracking Agent in Cylinder
    PENG Jian-Yu, LI Yuan-Hui, DAI Xing-Hang, XU Xiang-Xin, ZHANG Feng-Peng
    2017, 46(06):  24-27. 
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    The expansion mechanics behavior of soundless cracking agent (SCA) is studied by adopting the experiment and particle discrete element method.The output properties of axial stress of SCA in a cylinder with diameter of 150 mm is analyzed by experiment,the curves of axial pressure with hydration time of SCA under the two conditions of fully-constrained and reserving a free expansion space are obtained.Based on the basic theory of discrete element,the hydration expansion processes of SCA under the condition of reserving different free expansion spaces are simulated,the influence of volume expansion rate to axial stress is discussed in detail.The results show that the simulation results is basically consistent to the ones obtained by experiments,which further indicated that is is feasible to study the expansion behavior of SCA by adopting the particle discrete element method,besides that,with the increasing of volume expansion rate,the axial stress in the cylinder is decreased.
    The Burst Properties of Brittle Rock under Different Confining Pressure Unloading Conditions
    LIN Man-Qing, ZHANG Dian-Ji, NI Xiao-Shan, XI Ben-Jun, TU Li
    2017, 46(06):  28-33. 
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    Rock burst is a geological disaster under high stress environment excavation.Unloading test is done under different confining pressures loading and gradient on top loading-unloading on one sided by the large size of rock specimens.The strain of each measuring point inside of the test specimen is collected,combing with the macroscopic damage phenomenons of rock burst,the rock burst properties of brittle rock under different confining pressure unloading conditions is analyzed.The test results show that:the failure model of brittle rock after rock burst is affected directly by the different confining pressures caused by specimen unloading test;the initiation critical crack point during the rock burst process located in specimen unloading surface is caused by the tensile failure of the middle of specimen unloading surface firstly,then caused by the rock compression failure of the upper and lower of specimen unloading surface;the vertical strain value of the specimen point under the high confining pressure environment is larger than the value under the low confining pressure environment at the rock burst transient;the specimen rock burst intensity caused under high confining pressure loading and unloading path is relatively large.
    The Influence of Blasting Vibration to Adjacent Stope Mining in Sareke Copper Mine
    GUO Zi-Pei, ZHANG Cong-Rui, PENG Jia-Bin, CHU Yan-Yu, WU Di, CHEN Ren-Min
    2017, 46(06):  34-40. 
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    The disturbance caused by underground stope blasting to the surrounding rock stability of its adjacent stopes is inevitable.If the maximum charge amount per delay interval is too large，the rib spalling or roof caving can be appeared easily.So,the analysis of the influence of the underground stope blasting vibration to the adjacent is good to ensure the security and stability of underground stope.Based on the actual production situation of Sareke Copper Mine of Xinjiang,the influence of the underground stope blasting to the surrounding rock stability of its adjacent stopes is studied based on the field blasting vibration test method and numerical simulation method.The regression analysis of the field blasting vibration test results is conducted by using the Sadaovsky empirical formation,and the propagation attenuation formation of seismic wave is obtained.The the particle vibration velocity characteristics of adjacent stopes,the dynamic stress distribution of tunnel wall of adjacent stopes and the relationship of blasting stress and blasting velocity during the blasting process are conducted numerical simulation analysis.
    Research on Rheological Properties of the Single Superhigh-water Material Slurry
    YIN Chao-Yu, FENG Guang-Ming, DING Yu, GAO Peng, ZHAO Yu
    2017, 46(06):  41-46. 
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    Rheological properties of the single superhigh-water material slurry are measured under the different conditions of time,water volume fraction and temperature.The effects of time,water volume fraction and temperature on the rheological parameters of single slurry are analyzed.The results show that：①Single slurry A and slurry B are both the power-law fluids having time-variant parameters,and the shear thinning characteristics are showed;②in the range of experimental conditions,time,water volume fraction and temperature can affect the level of rheological parameters but could not change the rheological model of single slurry;③the relationship of consistency coefficient and single factor,and the relationship of rheological index and single factor can both be fitted by cubic polynomials.Based on the above analysis results,a rheological parameters model under the time,water volume fraction and temperature is established,by this model,the consistency coefficient and rheological index of slurry in any state can be calculated.The study results in this paper can provide theoretical support and guidance for the pipeline design and grouting construction.
    Control Technology of Return Fine Rate to Upward Medium-length Hole in Meishan Iron Mine
    LI Zheng-Gang, WU Rong-Gao, XU Zhi-Qiang
    2017, 46(06):  47-52. 
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    According to the situation of return fine rate in the upward medium-length hole charging process of Meishan Iron Mine,the measurement targets and key indicators are determined by analyzing the work processes.The explosives viscous（dispersion index) is analyzed by using DFMEA,the reasons are as follows:long transit time,great temperature difference between surface and underground and matrix volatile,the measures of the direct distribution by multi-purpose vehicle and matrix compensation of diesel can be taken to overcome the above difficulties effectively.The backward tube speed（continuous index) is conduct multiple regression analysis,the multiple regression fitting equation is obtained,based on the fitting equation,the optimal velocity value can also be obtained.the return fine rate values after improvement is collected,the process capability index values before and after improvement are conducted comparison and analysis,so as to verify the improvement effects.Finally,the improvement measurements and parameters are conducted solidification process to achieve the effective controlling of return fine rate of upward medium-length hole.The above study results in this paper related to some measures and parameters can provide some reference for the similar mines in our country.
    Resource Recovery Engineering by Clearing Landslide with Damming in Shengli East II Opencast Coal Mine
    HUO Zhi-Gang, CHANG Zhi-Guo
    2017, 46(06):  53-55. 
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    In order to timely recovery the coal resources buried by landslide in the west area of Shenli East II Open-pit stope,reduce the exposed area and time of the landslide loose mass in the south of the stope and to prevent the long time of consolidation settlement,the stope resources recovery plane by clearing landslide with damming is proposed.The dame parameters is designed,and the anti-sliding stability is checked.Besides that,the concrete steps of clearing landslide by damming for the recovery of coal resources is analyzed in detail,so as to guarantee the development of coal resources recovery engineering smoothly.
    The Rock Burst Damage of Surrounding Rock under the Disturbance of Static and Dynamic Load
    YOU Xiao-Ming
    2017, 46(06):  56-60. 
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    According to the lower trough rock burst accident of the 1306 working face of a mine,based on the large energy source monitored by SOS micro-seismic monitoring system,the analysis model under the acutal geological conditions is established by adopting FLAC2D software,so as to study the involution regularities of the stress and displacement of roadway roof and floor under the superimposed action of static and dynamic load.The mechanical response characteristics of the roadway surrounding rock under the different superimposed strength of static and dynamic load is simulated and analyzed by transforming the source location.The study results show that:with the with the source location is far way from the monitoring locations,which influence of the roadway roof and floor is decreased rapidly,and the influence of two sides of roadway are also reduced proportionally.The above study results in this paper can provide some theoretical basis and field guiding significance for the study of slope stability under the superimposed influence of static and dynamic load.
    Study on the Safe Recovery Technique of Pillars of Complicated Multi-layer Goafs
    YE Guang-Xiang, WANG Liu, ZHANG Shu-Biao, JIANG Yong-Heng, YE Ji-Huan
    2017, 46(06):  61-65. 
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    In order to effectively recovery of pillars resources in an iron-zinc polymetallic deposit under the condition of complex multi-latyer goafs,taking the the upper ore-bodies of the three section of the mining area as the study example,according to mining technical condition and the solid model of goaf of the mining area,the technical scheme for processing the goafs and recovery the pillars by using filling method and open-stope subsequent filling method respectively is proposed.The stress-stain and ground subsidence during the recovery process of pillars are simulated and analyzed by using FLAC3D software.The results show that:①during the process of pillars recovery,the rock stress is transferred,the surrounding rock and the filling body are compressed,and the roof is pulled.Besides that,in order to reduce ground subsidence caused the pillars recovery,the protection measures mainly for not mining the pillars of the first section,and secondly for reserving small amount of raw pillars in the key areas is put forward.
    Study of the Blasting Parameters and Ore Removal Way in the Evolution Process from Open Stoping Method to Caving Method
    SUN Jia, HAO Xian-Fu, GAO Qing-Wei, WANG Zhong-Quan
    2017, 46(06):  66-69. 
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    The mining method of Lijiagou mining area is evolved from open stoping to caving.The blasting parameters such as ore caving interval,least resistance line,bottom hole pitch,side hole angle are checked and changed in the evolution process of the mining methods;the two ore removal ways of transfer and craper are LHD are conducted comparison and analysis,through field test,the LHD method is selected as the ore removal way in the mining area;besides that,stress distribution of the adjacent roadways are calculated,and the advance interval is also determined.The practice results show that the adjustment of blasting parameters and the selection of ore removal way have a crucial role to reduce the dilution rate and loss rate during the mining process.The above study results related to study of the blasting parameters and ore removal way of Lijiagou mining area during the evolution process of the open stoping method to caving method can provide some reference for reducing the dilution rate and loss rate in the similar mines.
    Research Situation in High Pressure Grinding Rolls Type Selection
    GUO Xiao-Fei
    2017, 46(06):  70-74. 
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    Key factors which influenced the effect of comminution by high pressure grinding rolls were described combined with the characteristics of particle-bed comminution by HPGR.The research developments of the test method and equipment selection were reviewed.Effect of comminution by HPGR was mainly affected by properties of ore，working parameters of roller press and grinding process etc.Sufficient basis for process design could be provided through small and semi-industrial comminution test of HPGR，but test process was relatively complex.Prediction of working pressure，specific energy consumption，product size distribution in particle-bed comminution could be obtained by piston press test and mathematical models.But prediction results were required to verify its applicability as well as the result of empirical formula for selection of HPGR.Development tendencies of particle-bed comminution by HPGR are fundamental research on model of efficiency of energy transform，characteristics of crushed product，effect and the simulation study of HPGR in mineral processing technology.
    Study on Magnetic Roasting Process of Specularite Ore from Xinjiang
    MA Yu-Xin, BAI Li-Mei, HOU Yu, DENG Yu-Fen, LIU Shu-Xian
    2017, 46(06):  75-79. 
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    There are 35.20% iron and 30.64% calcium oxide in specularite ore from Xinjiang.Iron mineral is mainly specularite，while gangue minerals are mainly calcite and quartz.The specularite is micro-fine disseminated in ore，and is a typical refractory iron ore.In order to study phase transformation of iron minerals during magnetic roasting process，effects of roasting temperature，roasting time and coal ratio on magnetic roasting results and phase transformation of iron minerals of specularite ore were investigated.The results indicated that iron concentrate with iron grade of 65.95%，recovery rate of 77.70% can be obtained under the conditions of coal powder with mass ratio of 12%，reduction temperature of 800 ℃ for 75 min，magnetic separation was brought at magnetic field intensity of 120kA /m after ground the roasted products at 90% passing 0.074 mm.Meanwhile，roasting temperature intense influences magnetic roasting process.When roasting temperature blew 800 ℃ Fe2O3，specularite can transform to Fe3O4 through magnetic roasting.The content of Fe3O4 is highest at roasting temperature of 800 ℃；when the roasting temperature is higher than 800 ℃，portion of Fe3O4 translated to FeO，and specularite is over-reduction.The content of FeO is highest under roasting temperature of 900 ℃；When roasting temperature rise to 1 000 ℃，portion of FeO will translated to metallic Fe.The process of phase transformation corresponds to results of magnetic separation.2CaO·Fe2O3 is produced at 900 ℃ resulted from portion of Fe2O3 reaction with CaO，which could not recovered by magnetic separation.The results can provide technical reserence for comprehensive utilization of specularite ore.
    Kinetics Research of Sulfuric Acid Leaching from Blast Furnace Flue Dust Containing Zinc
    ZHANG Jin-Xia, ZOU Xuan, NIU Fu-Sheng
    2017, 46(06):  80-84. 
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    In order to investigate the leaching kinetics of sulfuric acid leaching zinc from blast furnace flue dust,sulfuric acid leaching test was carried out on a blast furnace flue dust from Hebei.Effects of leaching temperature and sulfuric acid concentration on the leaching rate of zinc were investigated.With the leaching temperature increased and sulfuric acid concentration increased,zinc leaching rate gradually increased,and leaching rate decreased.By using Avrami dynamic model,simulation results of zinc leaching process show that when n was 0.160 4,flue dust acid leaching process was in accordance with Avrami dynamic model,the apparent activation energy was 10.02 kJ/mol,thus the process was controlled by diffusion.To improve leaching efficiency,diffusion effect should be reinforced.Increase sulfuric acid concentration or rise reaction temperature can accelerate the reaction process and mass transfer process in the solution,zinc leaching rate increased.The experimental results provide a theoretical basis for wet leaching kinetics and the followed research and production practice of solid waste resource recycle and reuse.
    Study on Comminution Characteristics of Iron Ore from Liaoning
    LIU Jie, YUAN Shuai, LI Yan-Jun, HAN Yue-Xin, LIU Chang, YANG Guang
    2017, 46(06):  85-88. 
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    There is 28.74% iron in an iron ore in Liaoning，iron mainly exists in form of hematite.To determine proper comminution process，comminution characteristics research on the ore were conducted.Bond work index test indicated，Bond work index of ore is 8.66 kWh/t，and the ore belongs to medium-hard category and can be dealt with semi-autogenous grinding process.In order to further investigate crushing characteristics of ore in semi-autogenous grinding machine，impact crushing test and abrasion crushing test were carried out.Result shows that model of ore impact grinding is t10=80.82×(1-e-0.53×Ecs),A×b=42.8，the resistance to crushing the ore belongs to the category of medium-hard.And the abrasion index Ta=0.28，its abrasion resistance belongs to the hard category.Experiment results can provide basic data support for rational grinding method of the mineral.
    Beneficiation Experiment of Gold Ore from Zaozigou，Gansu
    DONG Zai-Zheng, ZHANG Shu-Min, GAO Peng, LIU Si-Ying, HAN Yue-Xin
    2017, 46(06):  89-93. 
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    There is 4.09 g/t gold in a gold ore in Gansu，contents of Cu，Pb，Zn，Fe and Sb are too low to have value.Main metallic minerals are pyrite，arsenopyrite，stibnite and limonite.To recovery valuable element Au，flotation-flotation tailings sodium thiosulfate leaching tests were conducted．Results show that gold concentrate of 56.78 g/t Au and recovery of 71.27% were got through one roughing，two cleaning and two scavenging closed-circuit flotation process under grinding fineness of -0.074 mm is 90%，Na2CO3 as pH regulator，isoamyl xanthate + butylamine aerofloat as collector and 2# oil as foaming agent.Substances，such as FeS2，FeAsS，Sb2S3，that affect gold leaching were enriched in concentrate.Flotation tailings treated with liquid-solid ratio of 4，Na2S2O3·5H2O dosage of 0.20 mol/L，CuSO4 dosage of 0.018 75 mol/L，(NH4)2SO4 dosage of 0.05 mol/L，and NH3·H2O dosage of 1.0 mol/L，pulp pH of 9.5，stirring speed of 450 r/min and leaching for 3 h，gold leaching rate of 67.05%，total gold recovery rate of 90.52% was obtained.Experiment results can provide technical basis for comprehensive utilization of the gold ore.
    Beneficiation Experiment on a Low Grade Specularite Ore Containing Gold
    LAI Wei-Qiang
    2017, 46(06):  94-98. 
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    There is 26.41% Fe and 0.67 g/t Au in a low grade specularite ore from Shanxi.Gold mainly exists in form of natural gold，natural gold accounted for 88.15% of total gold.Iron mainly exists in form of hematite-specularite，hematite-specularite iron accounted for 68.28% of total iron.To recovery valuable elements Au and Fe，preferential flotation of gold，flotation tailings low intensity magnetic separation-high gradient magnetic separation-reverse flotation to recovery iron process was conducted.Results indicated that，at grinding fineness of -0.074 mm 83.78%，using lime as pH regulator，sodium silicate as dispersant，butyl xanthate + butylamine aerofloat as collector，2# oil as frother，via one roughing two cleaning two scavenging gold flotation，gold concentrate with 29.31 g/t Au and recovery of 87.93% was obtained，gold tailings via one roughing one cleaning one scavenging low intensity magnetite separation，iron concentrate 1 with 65.86% Fe and recovery of 13.34% was obtained，low intensity magnetite separation tailings via one roughing one scavenging high gradient high intensity magnetic separation，high intensity magnetic separation concentrate using NaOH as regulator，modified starch as depressor，sodium oleate as collector，via one roughing two cleaning one scavenging reverse flotation iron，iron concentrate 2 with 61.79% Fe and recovery of 50.67% was obtained，mixed iron concentrate combined by iron concentrate 1 and iron concentrate 2 with 62.59% Fe and recovery of 64.01% was obtained.Test results can provide technical basis for comprehensive recycle of valuable elements.
    Influence of Magnetized Kerosene on Flotation Index of Molybdenum Ore from Luoyang at Low Temperature
    HE Ting-Shu, SHI Xu, LI Hui, WAN He, WU Chang-Ping, GUO Yu-Feng
    2017, 46(06):  99-103. 
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    There is 0.11% Mo in molybdenum ore from a molybdenum dressing plant in Luoyang.Molybdenum mainly exists in form of molybdenite，molybdenum in molybdenite accounted for 88.07% of total molybdenum.Kerosene was used as collector in on-site molybdenum flotation，viscosity of kerosene reduced in winter，dispersion ability weakens in pulp，flotation index is poor.To improve molybdenum flotation index at low temperature，molybdenum flotation using modified kerosene as collector was conducted.Results showed that:using magnetization modified kerosene in molybdenum flotation in winter can improve flotation index; When pulp temperature is 5 ℃，using un-magnetization kerosene and magnetization kerosene(magnetic field intensity of 160 kA/m，magnetization time for 1 min) as collector respectively，2# oil as frother，via one roughing one cleaning one scavenging closed circuit flotation，Mo grade obtained when using magnetization kerosene as collector is 0.5 percentage points higher than that using un-magnetization kerosene as collector，Mo recovery rate increased by 2.53 percentage points.Test has guiding significance for solve the problem of molybdenum recovery rate is lower in winter than the other three quarters in the dressing plant.
    Roasting-acid Leaching of K and Al from Alunite Concentrate
    ZHANG Yong-Kang, HU Si-Chun, ZHANG Yao, MA Hua-Long, FENG Nai-Qi
    2017, 46(06):  104-108. 
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    Main chemical composition of alunite concentrate，which was recovered from Zijinshan copper tailings in Fujian by flotation，were Al2O3，SiO2，K2O and SO3.Main mineral composition of alunite concentrate were alunite，quartz and dickite.Roasting-leaching tests were studied to extract valuable elements of Al and K from alunite concentrate.Results showed:alunite concentrate roasting at 600 ℃ for 1 h，roasted products leaching with sulfuric acid concentration of 60 g/L，leaching temperature of 80 ℃，liquid-solid ratio of 6，leaching time of 0.5 h，leaching rate of potassium was 98.47% and leaching rate of aluminum was 94.35%；Main chemical compositions of residue from leaching process were Al2O3 and SiO2，whose contents totaled to 90.44%.The residue was suitable as construction materials.Test results could provide technical support for the multipurpose utilization of the alunite concentrate by acid leaching process.
    Beneficiation Experiment on a Low Grade Spodumene Ore from Jiangxi
    WEN Sheng-Lai, WANG Ling-Long, FAN Lin-Qing
    2017, 46(06):  109-112. 
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    Beneficiation experiments were carried out，aiming at problems of high content of mud and bad flotation index of low grade spodumene ore from Jiangxi Province.Results show that with 300 g/t sodium carbonate + 450 g/t t sodium hydroxide adding in grinding mill，at grinding fineness of 0.076 mm accounted for 70%，-0.15 mm grade fraction deslimed，then with sodium carbonate，sodium hydroxide，calcium chloride as unite adjusting agent，modification oleic acid as collector via one roughing-three cleaning-one scavenging closed circuit flotation process，spodumene concentrate with Li2O grade of 4.45% and recovery of 74.17% was obtained，Li2O grade increased by 0.39 percentage points，recovery increased by 12.59 percentage points compared with on-site process；tailings of spodumene flotation via low intensity magnetic separation-high gradient high intensity magnetic separation，feldspar concentrate with Fe2O3 grade of 0.18% was obtained.
    As(Ⅲ) Removal in Water by Fenton Oxidation-Flocculation Method
    LI Fu-Ping, DUAN Wu-Lin, LUO Xiao-Yan
    2017, 46(06):  113-116. 
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    With the deterioration of groundwater arsenic pollution problem，arsenic pollution has become an issue of common concern in the world.To seek for the economic and reasonable arsenic removal technology，Fenton reagent oxidation-flocculation method is used for As (Ⅲ) removal test.Initial wastewater As (Ⅲ) concentration is 0.5 mg/L，optimum arsenic removal condition ensured in experiment is regulating wastewater initial pH=3.0，H2O2 dosage of 10 mg/L，mole ratio of Fe2+ to H2O2 is 0.2，reaction time is 10 min，As (Ⅲ) removal rate was 95.17%.Adopt the best conditions for a actual arsenic bearing wastewater from Ganzhou removal test showed that the As (Ⅲ)) removal rate can reach 94.71%，As(Ⅲ) concentration in water is 0.0042 mg/L，below the standard of 0.01 mg/L in drinking water health standards (GB5749-2006).Fenton oxidation-flocculation arsenic removal is a method using intermediate (including H2O2，·OH，O2·，·HO2，etc.) produced in Fenton reaction to flocculation combined As (Ⅲ) and iron salt.
    Mineralization Enrichment Regularity and Controlling Factors of Jiagantan Super-large Gold Deposit in Gansu Province
    BAI Yun, LI Hong-Rui, SHI Wen-Quan, TIAN Xiang-Sheng
    2017, 46(06):  117-124. 
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    The Jiagantan gold deposit in Gansu Province is located in the western part of the Qinling orogenic belt,which is a newly discovered gold deposit with super-large prospecting potential in the southern part of Xiahe-Hezuo gold mineralized belt.Taking the Jiagantan super-large gold deposit as the study example,based on the detailed field geological investigation and comprehensive study results,the mineralization enrichment regularity and ore-controlling factors of the deposit are analyzed.The study results show that:①the thickness variation regularity of the deposit show that the ore-bodies thickness of the western part is obviously larger than that of the eastern part of the mining area;②the elements distribution contours indicated that the concentration regions of high grade value are mainly distributed in the area of 3#~0# exploration line,which is the precipitation concentration area of the metallogenic materials in the mining area;from the west to the east of mining area,the overall grade reflects the evolution characteristics from high to low,which indicated that the metallogenic materials is migrated from the west to the east of mining area;③the overall mineralization enrichement regularity show that the mineralization intensity of the west is greater than the one of the east of the mining area,the existing of low-lying in the central mining area,it is resulted by the ore-bodies are destructed by the existence of faults.Through the analysis of the ore-controlling factors,the results show that the factors of formation,structure and alteration are closely related to the formation of the gold deposit in the mining area,among them,structure is the most important one of the ore-controlling factors.Combing with the analysis of mineralization regularity and ore-controlling factors of the deposit and the newly drilling results of the mining area,the further discussion results show that prospecting potential of the depth of the western part and its periphery of the mining area are huge,and the further prospecting work should be focused on these areas.
    Geological Characteristics and Prospecting Direction of Xiaoyuanshan Fe-polymetallic Deposit in Qinghai Province
    YANG Xiao-Gang, LEI Bo, LU Yao-Zu, LIU Chang-Cai, Qi-Shan-Zhi, YU Yong-Qiang
    2017, 46(06):  125-131. 
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    Xiaoyuanshan Fe-polymetallic mining area is located in the Qimantage ophiolite melange belt,which is one of the important Fe-polymetallic metallogenic belts in Qinghai Province.Many magnetic anomalies closely related to Fe-polymetallic mineralization are delineated in the mining area by conducting geological investigation work of Fe-polymetallic deposit,it is show that the metallogenic potential of the mining area is good.Based on the analysis of regional metallogenic geological background and geological characteristics of the mining area,the deposit geological characteristics and ore-controlling factors are discussed in depth.The study results show that:①the main surrounding rock formations are favorable for the formation of Fe-polymetallic mineralization,the metallogenic elements of W,Sn and Cu are enriched in Baishahe Rock Formation (Pt1b) of Jinshuikou Rock Group,carbonate rocks is hosted in stratum rocks (such as Tanjianshan Group) of Ordovician-Silurian,so the favorable surrounding rock conditions of Fe-polymetallic occurrence in Xiaoyuanshan mining area is provided;②17 magnetic anomalies with the mainly NWW-direction in the mining area are delineated,which show that the geological structure is one of the main ore-controlling factors of the metallogenic of Xiaoyuanshan Fe-polymetallic deposit;③the Fe-polymetallic deposits are mainly distributed in the contact belts of intermediate-acidic intrusive rocks and surrounding rocks,the distribution of orogenic type deposit is controlled by the intrusive rock bodies of the Late Variscan and Indosinian-Yanshanian,thickness of the Fe ore-bodies is 0.90~5.91 m,the TFe grade is 21.85%~44.34%,thickness of the Pb-Zn mineralized bodies is 0.10~5.45 m,the grade of Zn is 0.79%~13.60%,the grade of Pb is 0.63%~6.88%,which show that the prospecting potential in the mining area is good;④genesis of Xiaoyuanshan Fe-polymetallic is the typical skarn type deposit closely related to acidic magma,and it is controlled by the specific carbonate ore-hosed rocks,fracture tectonic position and magmatic hydrothermal activities.Based on the above analysis results,the prospecting potential of the mining area is studied,the results show that the superimposed area of magnetic anomalies and stream sediments elements anomalies,Tanjianshan Formation of Ordovician-Silurian and the Shiguaizi Formation of Carboniferous,and the tectonic positions such as the large faults and its adjacent fracture belts,magmatic intrusion belt are the favorable prospecting areas of Xiaoyuanshan mining area.
    A Geological Map Edge Matching Method Based on Considering Attributes Elements
    LI Wen-Jing, SHI Yong-Long, HU Dan
    2017, 46(06):  132-136. 
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    The geological boundary is not connected and geological content classification is not unified of the geological map produced by framing methods.According to the existing problems,a geological map edge matching method based on considering attributes elements is proposed.Based on comprehensive analysis of the spatial neighboring degree of geological elements and geological attribute similarity,the matching geological bodies are calculated by using the weight calculation functions of rough set and the classification function of cluster analysis method,therefore,the edge matching problems existed in the edge matching process of geological map can be solved effectively.The edge matching test based on three geological maps are conducted,the results show that compared with the traditional geological map edge matching method,the application range of the new method proposed in this paper is more large based on comprehensive consideration of the topological relations,spatial trends and geological properties of the matching geological body,besides that,the edge matching is more accurate and efficient than the traditional method,which is help for providing powerful support for the construction of large scale geological map seamless database.
    Mineshaft Video Images Matching Based on Gradient Space and Binary Texture Descriptor
    XING Yuan-Xiu
    2017, 46(06):  137-142. 
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    In order to increase the accuracy and efficiency of image matching for low quality mineshaft video images,a new match algorithm based on gradient space and binary texture is proposed.Firstly，in case of improving accuracy,the feature points and their neighborhood status are quickly examined,the binary texture features and statistical features are combined to construct a rotation-invariant binary texture and oriented gradient histogram (RBT-OGH) descriptor;secondly,according to the classification status of the feature points,and two different matching strategies are used for image matching to improve the working efficiency of the algorithm proposed in this paper.The test results show that the problems of image blurring,illumination variation,low constrast and image deformation existed in the mainshaft video images,therefore,it can be applied to conduct mineshaft video images matching with high efficiency.
    Improved Fuzzy Median Filtering Algorithm of Mine Video Monitoring Images
    YU Hui-Ning
    2017, 46(06):  143-146. 
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    Due to the existing factors of dust and uneven illumination in mine,so,the images obtained by mine video monitoring system are usually containe a lot of noise and the brightness of the image is uneven,it affect the real-time effective monitoring of the main production status to some extent.In orde to process mine video monitoring images with high effects,an improved fuzzy median filtering algorithm is proposed.Firstly,an adaptive calculation method of improved fuzzy membership degree coefficient is put forward,the minimum,maximum and average grey values of the pixels of each filtering window of mine video monitoring image are taken as the thresholds to calculate the fuzzy membership degree coefficients of the grey values of different pixels,so the deficiencies of setting many thresholds of the classical calculation method of fuzzy membership degree coefficient is overcame;then,the fuzzy weighted median filtering is conducted based on the fuzzy membership degree coefficients;finally,in view of the different fuzzy degree of the filtered image,the gray histogram of fitered image is conducted equalization processing to enhance the overall visual effects of the image.The program of the algorithm proposed in this paper is written by C# language,the experimental data are the two mine video monitoring images acquired from a mine.The fuzzy median filtering algorithm,weighted median filtering algorithm and switch median filtering algorithm are used to conduct contrast analysis of the filtering effects,the above experimental results of the algorithms are evaluated by peak signal to noise ratio (PSNR) and time-consuming,the experimental results show that the performance of the improved fuzzy median filtering algorithm is superior to the fuzzy median filtering algorithm,weighted median filtering algorithm and switch median filtering algorithm,besides that,the time-consuming of the improved fuzzy median filtering algorithm is less than the orther three algorithms,it can provide the reference for processing a large number of mine video monitoring images effectively.
    A Distributed and Real-time Monitoring Method for the Deep Slope Displacement
    LI Huai-Liang, TUO Xian-Guo, RONG Wen-Zheng, 吕Zhong-Yun
    2017, 46(06):  147-150. 
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    In view of the traditional monitoring method of the landslide deep displacement,the disadvantages of high cost of artificial monitoring,low monitoring frequency and poor real-time performance,a multi-point distributed and real-time monitoring method for deep slope displacement is proposed.The low power microprocessor and the acceleration sensor are utilized to realize the modularization of the measurement unit of this method,and are arbitrarily combined as the sensor groups.The sensor group is arranged vertically into the landslide borehole during the process of construction,so as to measure the inclination angle of each unit of the landslide in real time.The internal deformation value of the landslide body is calculated and the location of the sliding surface is determined based on inclination angle of two adjacent measuring units.The study results show that the measurement method proposed in this paper with the characteristics of high real-time,unattended,arbitrarily extended and and tailoring,and it can effectively reduce the cost of artificial measurement,the effectiveness of the method is also proved by actual application.
    Comprehensive Study of the Stability Characteristics of a Landslide in Southwest China
    WANG Bo, WANG Bing-Du, ZHU Shu-Yun
    2017, 46(06):  151-155. 
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    In order to analyze the stability of a landslide in Wanyuan City in Sichuan Province,through field engineering survey,geological mapping,drilling,in-situ monitoring and sample collection and testing,the deformation characteristics of the landslide is discussed,engineering geological model of the landslide is established,and the qualitative and quantitative stability analysis of the landslide is conducted.The stability coefficients of the four potential sliding surfaces of the main section under the conditions of natural and heavy rains are calculated respectively by adopting unbalanced transfer coefficient method.The comprehensive study results show that under the natural condition,the landslide is in the state of stable~basically stable,the actuality stability of the landslide is good,while under the condition of heavy rains,the landslide is in the state of stable~unstable,the actuality stability of the landslide is poorer.It is further indicated that with the depth of the potential sliding surfaces under the two condition,the stability of the landslide are both increased,the more depth,the less likely of sliding.Based on the above analysis results of this paper,the two specific prevention and treatment schemes are proposed.The related analysis results can provide some reference for the prevention and treatment of the landslide.
    Analysis of Slope Deformation Law Induced by Mining and Control Countermeasures
    JIA Yu-Yue, GAO Yu-Shan
    2017, 46(06):  156-159. 
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    Taking the mining slope of a mine as the study background,the engineering geological conditions of the of the surrounding area of the slope is analyzed comprehensively.The slope stability calculation model is established based on SLIDE software,the slope stability under the different conditions of heavy rainfall or cutting slope and drainage are conducted comparison and analysis.The development characteristics of slope deformation and occurrence mechanism of landslide are judged.Through calculation of different slope models,the influences of the above conditions to slope stability are analyzed clearly.The above analysis results in this paper provide some theoretical basis for stability treatment and landslide prevention of the slope.
    The Grey Model and Its Application Based on Dynamic Correction of Deviation Threshold
    WANG Guo-Zhen, FU Hou-Li, FENG Bai-Yan, YANG Ke
    2017, 46(06):  160-165. 
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    The slope system is an open and multi-factor dynamic system.The establishing of grey forecasing model with high precision is of very important to analyze the evolution regularity of slope displacement and slope stability evaluation.Considering the water-softening influence of slope rock,the water-softening coefficient is introduced,water-softening total evolution equation related to the saturated water-water loss cycles is derived based on the relationship between water-softening parameters and stress-strain.The conventional threshold of the displacement increment deviation is modified based on the water-softening coefficient,so as to get the increment deviation threshold of the slope under the different deformation stage.Taken the modification value of displacement increment deviation as the identification index to identify the abnormal monitoring data and conduct data adjustment calculation,so as to establish the grey prediction model of dynamic correction of deviation threshold based on considering the influence of water-softening.The grey model established in this paper is applied to the slope engineering of Changshang open-pit tailings in Sanshandao Gold Mine,the analysis results show that the prediction results of the model is similar to the measured data,therefore,the prediction precise of the model is high,which further show that the displacement change trend in the dynamic cycle of water level fluctuation can be described effectively,and it has some important significance for studying the dynamic stability of slope.
    Landslide Early Warning Model for Mine Dumping Site Based on BP Neural Network
    XIE Zhen-Hua, DOU Pei-Qian
    2017, 46(06):  166-169. 
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    Dumping site landslide is one of the major disasters for mine,threaten the safety mining of mine.The early warning index system for mine dumping site landslide is proposed,according to the comprehensive early warning indexes,the dumpling site landslide early warning model based on BP neural network is established.The indexes including adhesion,internal friction angle,surface displacement,internal displacement,rainfall etc.are selected as the input units of BP network,appropriate excitation function and learning step are selected,and 20 sets of sample data for actual engineering are also selected for conducting the training and learning of BP neural network by using improved gradient algorithm.The learned and trained early warning model is applied to analyze the landslide of the dumpling site of a mine in Guizhou Province,the early warning analysis results is accordant with the actual situations of the dumping site,which show that the early warning model established in this paper is reasonable and has application value.
    Analysis of Influence of the Expansion of a Slag Reservoir on Its Nearby Railway Roadway
    WU 二Lu, RUAN Yong-Gang, MA Ke-Meng, ZHU Jun-Gao
    2017, 46(06):  170-174. 
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    In order to analyze the influence the second phase expansion engineering of the Yunnan Qiujialingzi phosphogypsum slag reservoir on the Guiyang-Kunming railway roadbed located on the east side of the slag reservoir.Two typical cross sections of the east of the slag reservoir are selected to conduct finite element simulation based on the BCF plane finite element software developed by the institute of geotechnical engineering,Hohai University,so as to study the influence of the expansion of the slag reservoir on the the deformation of railway roadbed,besides that,the stress deformation and stability of the roadbed and slag reservoir are discussed in detail.During the simulation analysis process,the simulation of the soil mass is conducted by adopting Dengken-Zhang fei nonlinear constitutive model.The results show that due to the roadbed of roadway is located the limestone distribution area with high intensity,therefore,the influence of the expansion of the slag reservoir on the deformation of roadway roadbed is small,that is to say,the normal operation of roadway can not be affected.The feasibility and rationality of the expansion scheme of the slag reservoir is verified based on the above simulation analysis in this paper.
    Test Study on Minimum Ignition Temperature of Sulfide Ore Dust Cloud
    SUN Xiang, RAO Yun-Zhang, LI Chuang, MA Shi
    2017, 46(06):  175-179. 
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    The test study on the minimum ignition temperature of the dust cloud of sulfide ore is carried out by using the standard test device of Godbert-Greenwald constant temperature furnace.Under the given test condition，the minimum ignition temperature of sulfide dust is tested,and the influence of dust′s sulfur content，particle size and mass concentration to the sulfide dust minimum ignition temperature is also analyzed.The results show that:the minimum ignition temperatures of A，B and C dust cloud samples of sulfide ore are 386，454,512 ℃ respectively;the higher the sulfur content is,the lower the minimum ignition temperature of the dust cloud of sulfide ore would be;the smaller the particle size of dust cloud,the lower the minimum ignition temperature of the dust cloud of sulfide ore would be;with the increasing of the mass concentration of the dust cloud,its minimum ignition temperature is increased first but decreased later.The above study results can provide some reference for understanding the fire and explosive risk of the sulfide dust as well as guiding the safety production of sulfide ore mines.
    Numerical Simulation of Flow Mechanism of Water-inrush in Coal Mine Based on Non-linear Flow Model
    YANG Bin, YANG Tian-Hong, SHI Wen-Hao, YANG Xin
    2017, 46(06):  180-185. 
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    Water inrush is one of the great disasters which threaten coal mine safety production.In order to discuss the law of velocity and pressure and reveal the change of flow state of water-inrush in mines,a non-linear flow model is used to simulate the complete flowing process of water-inrush in Yi′an coal mine.The study results show that when the water-inrush in Yi′an coal mine reaches to the maximum water emission,the pressure of aquifer is 0.2~0.3 MPa.Water-inrush is actually a process with pressure decreasing and velocity increasing,and the pressure drop of aquifer is the precursor of water-inrush.Besides that,the pressure and velocity varying at the out-inlet of the water-inrush channel are changed dynamically,the three flow fields are composed of an an integral whole.The vortex of water-inrush is the spatial response of laminar to turbulent flow,which indicates that the water-inrush is a process of flow translation.The further study results show that the stronger of water infiltration characteristics in water-inrush channel,the greater of water-inrush disaster.The above analysis results in this paper can provide some reference for confirming the reasonable mechanics parameters and the geometric structure of water-inrush channel.
    Research on the Flocculation Settlement Rules and Parameters Optimization of Filling Tailings
    GAO Zhi-Yong, WU Ai-Xiang, PENG Nai-Bing, JIAO Hua-Zhe, LI Gong-Cheng
    2017, 46(06):  186-191. 
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    In order to study flocculation settling rules of tailings,tailings slurry concentration,XT9020 solution concentration and XT9020 dosage are selected as influence factors,unit area consumption capacity is regarded as evaluation index,results show tailings slurry concentration,XT9020 solution concentration and XT9020 dosage all show nonlinear relationship with unit area consumption capacity; slurry concentration is 15%,XT9020 solution concentration is 0.3%,XT9020 dosage is 25g/t,the unit area handling capacity is 3.15t/(h·m2),influence degree are as follows,slurry concentration>XT9020 concentration>XT9020 solution concentration.Design Expert software is used to regression fitting for flocculation settling model,slurry concentration is 15%,XT9020 solution concentration is 0.22%,XT9020 unit consumption is 26.67g/t,unit area handling capacity is 3.26t/(h·m2),and optimum,experimental value and predicted value agreement degree is good.
    Recovery of Pb and Zn from Pb-Zn Tailings in Yunnan by Beneficiation Metallurgy Combined Process
    XIAO Jun-Hui, WANG Jin-Ming, FU Kai-Bin, WANG Zhen, XU Long-Hua
    2017, 46(06):  192-196. 
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    There is 9.87% lead,6.25% Zn in a lead-zinc tailings from Gejiu,Yunnan.Most of lead,zinc packaged each other with gangue,it is difficult to separate lead from zinc.Zinc leaching-gravity separation by shaking table experiment was put forward to recovery lead and zinc.Test results showed that:leaching temperature is 70 ℃,dosage of sulfuric acid is 15%,dosage of hydrofluoric acid is 15%,granularity of leaching materials extract is -0.5 mm,liquid-solid ratio is 1.5,leaching time is 120 min,zinc leaching rate can reach 97.02%,Pb grade of leaching residual is 15.37%,leaching residue ground to90% passing 0.045 mm,via one roughing-one cleaning gravity separation by shaking table,lead concentrate with lead grade 45.68%,0.24% Zn,lead recovery rate of 89.98% was obtained,separation effect of lead and zinc is good.After leaching process,crystalline state of leaching residual is dense,and new mineral phrase was generated；lead changes into indissolvable lead sulfate,zinc changes into soluble zinc sulfate during leaching process,lead and zinc was separated through solid-liquid separation.