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Table of Content

    15 August 2012, Volume 41 Issue 08
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    Study on Surrounding Rock Deformation Mechanism on Daye Iron Subsequent Filling Stope
    WANG Dong-Xu, SONG Wei-Dong, YAN Qin-Wu, MEI Lin-Fang
    2012, 41(08):  1-5. 
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    Taken the similar material simulation techniques as the main research tools, the law of rock deformation, stress and damage effects of different structural parameters of under sublevel mining subsequent filling was studied with the total station, strain gauges and digital cameras.The law of roof damage was also mentioned.The major results are: the Daye iron ore stope's reasonable structural parameters were revealed; the stress in the roof is shear stress, which in the pillar is compressive stress; roof stability is the key factor for the stope, which should ensure the contaction between the roof and filling body after filling the goaf; the caractor of the stope stress distribution is contrary to the direction of mining, which is lean to the first mining ore block.
    Comprehensive Technology Research on the Safe Mining of Complex Water-Rich Deposits
    CHU Jun-Kai, HUO Jun-Fa, CUI Cun-Wang
    2012, 41(08):  6-11. 
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    The technical problems of the Gaoyang iron mine to solve complex water-rich deposits efficient low-cost mining were introduced.Technology of multilayer bit orebody disc area integration tiered mining cemented filling mining method,high viscous fine grain tailings cemented filling,local curtain note pulp seal locking,rock deformation damage monitoring and the pressure monitoring, and large displacement directed drilling and grout sealing of underground water were adopted.Monitoring and detection methods, water technology and the ore body extraction system were integrated.It improves the recovery of resources, effectively control the roof strata movement, to avoid surface subsidence caused by underground mining and safety risks.Finally, it achieves mine orebody recovery the body of the safe and efficient mining.
    Mining Problems of Qingtonggou Mercury-antimony Mine and its Countermeasures
    GUO Jin-Ping, ZHANG Wen, ZHAO Hong-Sheng, ZHANG Wei-Bin
    2012, 41(08):  12-14+18. 
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    After many years of mining, there are some problems in Qingtonggou Mercury-antimony mine, such as resource depletion and environmental and geological disasters.The survival and development of the mine faces with tremendous pressure.Sustainable development plans such as total tailings to fill goaf, artificial pillar to recover residual pillar, waste lifting stoping to mine extra-narrow ore bodies, and utilization of tailing resources are proposed from the perspective of resources and environment.This plan gets some social and economic benefits.
    In-situ stress Measurement and Distribution Characteristics of Liguanji Iron Mine
    LI Hong-Jun, LI Chang-Hong, ZHOU Qin, Cheng-Qiang
    2012, 41(08):  15-18. 
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    A three-dimensional stress test was conducted at 8 points at -120, -220 and -320 m levels of Liguanji Iron mine, and rock cores with strain gauge obtained was implemented temperature calibration and confining pressure calibration test.The results indicate that each of the principal stresses is in compression stress, without tensile stress.The in-situ stress field of the iron mine is in horizontal tectonic stress, the value of maximum principal stresses range from 10.29 MPa to 22.16 MPa, and their orientation was about SE-NW, the value of vertical principal stresses are close to the weight of top strata in unit area.The value of maximum shear stress at each point are greater, which is more than 2 MPa.The results provide a reliable basis for mining stope proper redistribution, tunnel disposal and anchor support design.
    Pillar Recovery Technology Research in a Iron Mine
    HU Dao-Xi, YIN Bao-Chang
    2012, 41(08):  19-20+24. 
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    A mine adopted the room and pillar mining method, mine room with a shallow hole segmented the stope subsequent (waste rock) filling mining method and its production is in closing.Combined with the present situation, the upward layer filling method with reservation ore wall is proposed.The pillar between waste backfill was recycled by this method.The measures of safety management were adopted, and good economic and social benefits have been produced.
    Study on Mining Methods for Thick and More than Slow Inclined Ore Body in an Iron Mine
    CUI Shu-Zhong
    2012, 41(08):  21-24. 
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    This article through to a gently inclined medium thick orebody mining method research, optimize the existing mining technology, mining method contrast and finally choose the vertical layout of the stage of deep-hole drilling drilling phase space method, the method parameters and construction technology are described and summarized.
    Application of Downward Drift Cemented Filling Mining Method in Huangshilao Mine Area
    XU Jian, WANG Xiang-Gui
    2012, 41(08):  25-27. 
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    Some rock is fractured, poorly stability and the mining technical condition is more complex.It is a complex problem in the China mining region.Huangshilao gold mine in Tongling Huangshilao Gold Mine Limited Liability Company adopted the downward drift slicing and filling with waste rock mining method, and this method overcome these problems.The main technical indicators are as follows, the production capacity of its stope is 30～40 t/d，ore dilution rate is 4%～6%，ore loss rate is 5%～7%.The production is 1 600 kt using the filling with waste rock mining method.
    Model Test Study on Failure Process and Stability of Dump Site
    REN Wei, LI Xiao-Chun, WANG Shao-Quan, SHI Lu
    2012, 41(08):  28-33. 
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    A device related with waste dump model test has been developed, with which natural selection process is adopted to generate the dump site, and slope failure is achieved by raising one side of the devices.The results demonstrate that sliding surface is nearly a straight line, and initial failure position concentrates on 1/2～3/4 height of the dump body.Upper position failure is very likely to happen after initial collapse, with a larger scale.Failure dump start to accumulate at the height of 1/2, with a raising amount when height reduces.It consists of two parts, one part is from the initial damage and the towed upper dump, which occupies most of the weight, and the other part is driven by the decline in the process of sliding.A steeper base slope angle brings a larger range of damage.Strength parameters from back analysis by different slip surface are close, the average value is 33.2°, with standard deviation of 0.96°.They bring close factor s of safety, with an average value of 1.12 and standard deviation of 0.015, which demonstrate 10% to 14% safety reserve of the slopes after failure.Because stones used in the model test are dry and have uniform particle size, so the failure process get in the model test is different from previous studies, test results can only be applied to gravel waste dump site with low groundwater.
    Activity Characteristics and Stability Evaluation of Pressure in Yichang Phosphorus Mine
    XIAO Yun, LI Xian-Fu, WANG Jia-Guo
    2012, 41(08):  34-36+43. 
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    The disasters dynamics and security of phosphate was one of the important problems in Phosphorus ore-deposit mining.Based on the site survey and engineering test in Yichang Phosphorus, the collection of physical and mechanical parameters for ore, the research of mine geological conditions and mining structural parameters, the characteristics and the activities laws of ground pressure, the main controlling factors of ground pressure were identified.The fuzzy matter-element model of stability evaluation on ground pressure in empty areas was built and the stability of underground mining partition was analyzed combining practical projects.The evaluation results are consistent with the actual values, which provide some useful reference for the pressure safety study in phosphate rock mass.
    Rock Mass Strength Parameter Selection for a Mine Slope
    DIAO Hu
    2012, 41(08):  37-39+64. 
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    In rock slope stability study, the slope rock mass strength parameters usually needed to be known.And experiment usually provides slope rock strength parameters.Therefore, how to convert Chengbianpo rock parameters stability analysis of rock mass needed parameters of rock slope stability analysis is very important, the results of the analysis on the slope stability has great influence.The domestic and international in common use in the intensity parameter transformation methods for comparative analysis was studied.Meanwhile, the modern BP neural network method was used in the slope rock mass strength parameters of the conversion.It was used in the practical slope stability study, and the application effect is remarkable.
    Energy Formula of Rockburst
    JIN Xiao-Chuan, ZHOU Zong-Hong-
    2012, 41(08):  40-43. 
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    The occurrence of rockburst was resulted from the sudden burst of energy accumulating in the rock mass.Direct calculation methods were applied for the judgment for energy of rockburst.Research and analysis show that engineering excavation depth is the main external cause, and that rock compressive strength is the main internal cause.Combining these two factors, energy formula of rockburst is created from the perspective of energy and two coefficients of energy formula are inferred by dimensional analysis.Based on energy formula of rockburst, applicable conditions of energy formula and judgment for rockburst by energy are further stated.Firstly, the results of this formula in practical engineering prove that this formula is reliable.What is more, it is found that engineering excavation depth is inversely proportional to the coefficient（k）of energy formula .Finally, it is obtained that the deeper engineering excavation depth becomes, the greater the influence on rockburst is.
    Research on Controlling Surface Subsidence to Deep Coal Mining With Filling
    ZHOU Jie-Bin, LIU Chang-Wu, LI Xiao-Di, XU Yu-Hang
    2012, 41(08):  44-47+60. 
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    Combining with the advantages of the traditional long wall caving method and conventional filling technology method, according to the specific mining condition of 1221 mining face of Xingdong mine, super-subcritial extraction and cave backfill grouting combined is proposed to control the surface subsidence.It provides theory and technology support for mining under building.Meanwhile, the mining sequence and effect of reducing subsidence were analysis.Results show that effect of reducing subsidence is obvious by using this method, and the sink rate is smaller than 0.2.
    Experimental Study on the Beneficiation of Tiekeng Limonite Ore by Ball-pressure Pelletization-magnetization Roasting-Low Intensity Magnetic Separation
    SHEN Yuan-Hai, LUO Xian-Ping, FENG Xiao-Shuang, CHEN Jiang-An, CHEN Xiao-Ming
    2012, 41(08):  48-51. 
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    For the properties of Tiekeng Limonite Ore, ball-pressure pelletization-magnetization roasting-low intensity magnetic separation was used to improve the iron concentrate grade.Investigated the influence of balling conditions to pellet strength, magnetization roasting conditions and grinding fineness to iron concentrate.The results show that, under the conditons of the mass ratio of inner coal, water and bending agnet CMC to raw ore each for 20%, 10% and 0.5%, the pressure 190 kN, ball-pressure pelletization can make the pellet strength achieve to demand.Under the condition of the mass ratio of outer coal to raw ore for 15%, roasting temperature 900 ℃, roasting time 50 min, magnetization roast the pellet, after grinding the roasting ores to the size 85% -0.074 mm, carried out once roughing once cleaning magnetic separation under the magnetic field intensity each as 159.2 kA/m, 119.4 kA/m, iron concentrate with iron grade of 63.55%, iron recovery of 83.54% and SiO2 grade of 6.38% was obtained.
    Experiment of Roasting-Low Intensity Magnetic Separation-High Intensity Magnetic Separation Technology of a Manganese-Bearing Hematite Ore
    TANG Xue-Feng, LI Jia-Lin
    2012, 41(08):  52-55+60. 
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    According to the characteristics of a hematite with high content braunite, first reduced the hematite to artificial magnetite by magnetizing roasting, then separated the iron with manganese and gangue by low intensity magnetic separation, recovered the manganese minerals from low intensity magnetic separation tailings by high intensity magnetic separation.The experiment results got the iron concentrate with yield 71.32%, iron grade 64.18%, iron recovery 94.79%, manganese concentrate with yield 13.78%, manganese grade 27.98%, manganese recovery 79.45%.Iron and manganese are comprehensively recovered.
    Mineral Processing Technology of a Fine Pyrrhotite-bearing Iron-Zinc Ore
    NIU Fang-Yin, MA Jing, WANG Zhong-Yang, WANG Yong-Hai
    2012, 41(08):  56-60. 
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    The objective minerals of an iron-zinc ore are magnetite and sphalerite. But some sphalerite encapsulated the fine and strong magnetic pyrrhotite which can lead to sulfur exceed the standard in iron concentrate or effect the grade of zinc concentrate if with improper treatment. In order to provide the technical support for the development of the ore, mineral processing technological research has carried. The results show that first zinc flotation and then iron weak magnetic separation technology can solve the problem of sulphur content exceed the standard of iron concentrate. Regrinding zinc crude concentrate to 85% -400 mesh then cleaning can guarantee the zinc concentrate grade. The experiment finnally got the zinc concentrate with grade 48.74% and recovery 68.97%, the iron concentrate with grade 63.29% and recovery 90.58%, the sulfur content 0.29% in iron concentrate.
    Inhibiting Zinc Floating Copper to a Refractory Cu-Zn Ore by New Type Inhibitor Yn
    YE Xue-Jun, HU Cheng, LIU Zi-Shuai, XIONG Li
    2012, 41(08):  61-64. 
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    A refractory Cu-Zn plans to be developed by selective followed flotation technology from Guangxi.As part of the zinc and copper minerals floatability similar, in order to obtain a better test indicators, combined using small molecule organic inhibitors Yn and collector Z-200 to carry out the closed-circuit test, obtained the copper concentrate with copper 23.15% and recovery rate of 78.24%, zinc grade 5.61%, comparing to inhibitors ZnSO4+Na2SO3, copper grade and copper recovery were increased by 4.59 percentage points and 8.83 percentage points, lower 2.61 percentage points of zinc of copper concentrate.
    Experimental Study of New Technological Process on Flotation of Intricate Copper-lead-zinc Sulfide Minerals in Gansu
    LI Guo-Dong, BAI Ya-Lin, BAO Xi-Lin, YUAN Yan
    2012, 41(08):  65-69+72. 
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    The original technological flowsheet cannot adapt to the copper-lead-zinc multi-metal sulfide ore in Gansu due to ore property changing.In order to solve this problem, new technological process on flotation experiments were carried out, which is copper and partly lead-zinc selective bulk flotation firstly, then separation of Cu and Pb-Zn, other Pb-Zn bulk flotation with sulfur, last separation of Pb-Zn and S.A Cu concentrate contenting Cu 20.99% with recovery of copper is 74.23%, and a Pb-Zn concentrate contenting Pb 16.65% with recovery is 91.11%, contenting Zn 27.32% with recovery is 93.32%, and a S concentrate contenting S 41.62% with recovery is 37.58%, the total recovery of associate gold and silver which in Cu concentrate and Pb-Zn concentrate are 83.84% and 88.27% of selection index can be obtained by the closed circuit test.
    Pilot Test of a Pyrite Slime Flotation by Cyclone-Static Micro-bubble Flotation Column
    HUANG Gen, YUE Shuang-Ling, WEN Han-Rui
    2012, 41(08):  70-72. 
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    In order to effectively utilize the slime produced in the course of producing -3 mm production in a pyrite concentrator from Guangdong province, carried out the pilot test of once roughing once cleaning column flotation by two φ400 mm×4 000 mm cyclone static micro-bubble flotation columns.Suitable handling capacity, reagent system and circulating pump pressure of flotation column were determined by conditions test.After 72 h continous production, the S concentrate with 48.46% grade, 93.71% recovery was achineved, comparing to the spot flotation machine, the S recovery increased by 13 percentage ponits.
    Study of Divergences of Floatability and Physical Property of Associated Pyrite from Different Deposits
    HE Gui-Chun, WU Yi-Peng
    2012, 41(08):  73-75+97. 
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    The characteristics of associated pyrite in Dachang Cassiterite Polymetallic Mine, Fankou Lead -zinc Mine and Wushan Copper Mine and the influence of pyrite depressed by CaO in butyl xanthate system were researched.The results show that associated pyrite in Dachang Cassiterite Polymetallic Mine, Fankou Lead-zinc Mine was p-type semiconductor, associated pyrite in Wushan Copper mine was n-type semiconductor.The order of sulphur-iron ratio of three kinds of pyrite was Dachang Cassiterite Polymetallic Mine＞Fankou Lead-zinc Mine＞Wushan Copper Mine.The order of crystal lattice constant was Dachang Cassiterite Polymetallic Mine＞Wushan Copper Mine＞Fankou Lead-zinc Mine.The floatability of three kinds of pyrite is mainly influenced by the semiconductor type and sulphur-iron ratio, the difficulty of pyrite depressed by CaO is mainly influenced by the crystal lattice constant.The associated pyrite with p-type semiconductor and major sulphur-iron ratio is easily floated.The pyrite with bigger crystal lattice constant is easier depressed by CaO.
    Study on Process Mineralogy of the Mica Mineral in Zhumadian
    GUAN Jun-Fang, HU Lin-Qiang, YANG Hui-Qun, ZHANG Dan-Ping, LU Kang, ZHANG Ling-Yan
    2012, 41(08):  76-79. 
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    The process mineralogy of the mica mineral in Zhumadian Henan Province was studied by chemical analysis, polarizing microscope, X-ray diffraction and other testing methods.The results indicate that the mica mineral has the high concentration of SiO2 and Fe2O3, objective mineral is muscovite, and most of the gangue mineral are quartz and biotite.Fine tourmaline exists in the mica layer.According to the process mineralogy, the minerals which are only crushed and screened can't be used, and complex mineral separation must be carried out.The mineral processing technology is which biotite and tourmaline can be removed by magnetic separation, quartz can be removed by flotation, and may be treated by peeling .
    Beneficiation Method and Research Direction of Refractory Oxidized Copper Ores
    WANG Kai, CUI Yi-Qi, TONG Xiong, ZHANG Min
    2012, 41(08):  80-83+117. 
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    Introduce some kinds of new flotation reagent of oxidized copper ore.To the complex components, high clay content and fine particle refractory oxidized copper ore, summarize the main treatment methods and research results respectively, on the basis of which analyze the research emphasis and direction of recycling of refractory oxidized copper ores.
    Mineral Identification Based on the Optimized N-FINDR Algorithm of Hyperspectral Remote Sensing Images
    QIAN Jin, DENG Ka-Zhong, LIU Dong
    2012, 41(08):  84-87+91. 
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    In order to improve the accuracy of mineral identification，use the Cuprite regional AVIRIS and HYMAP hyperspectral data to extract the mineral end members based on LSMM and a optimized N-FINDR algorithm，and accurately identify minerals.Experiments show that：Linear spectral mixture model is easy to operate，the optimized N-FINDR algorithm is superior to traditional interactive end member extraction method，recommend for fine identification of the mineral composition.
    Geochemistry and Structural Features of Caiyuanzi Diabase from Dongchuan Area
    MA Dong, WANG Sheng-Wei
    2012, 41(08):  88-91. 
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    Analyzed the geochemistry features of Caiyuanzi diabase from Dongchuan area and found that: the content of rare erath elements was much higher,w(SiO2)was 39.19%~53.31%; w(La)/w(Sm) and w(LREE)/w(HREE) was low which showed the fractionation of light-heavy rare earth was not obvious; w(La)/w(Yb) was 1.90~4.34 wich showed light enrichment of light rare earth; Eu was no abnormalities which showed no plagioclase fractional crystallization in the diagenetic process; Nb and Ta was no obviously abnormalities which showed less contamination of primitive magma by crust materials.Geochemistry analysis showed obviously ocean island basalts, the formation age was at  later Early Proterozoic end-eraly mesoproterozoic, and a large number of mantle matter upwelling.Dongchuan diabase should be product of continental rift extensional, massive upwelling of mantle material, asthenosphere upwelling of lithospheric tectonic background.
    Mixed Qos Control Surveillance System Architecture for Mixed Explosives Vehicles
    TONG Yan-Jun, FENG Xia-Ting, SUN Wei-Bo, WANG Yan
    2012, 41(08):  92-97. 
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    In order to realize the remote monitoring and management for mixed explosive vehicles, a wireless video surveillance system architecture for mixed explosives vehicles based on the mixed quality of service control (QoS) technology was proposed.The principal factors affecting the quality of service were analyzed, combined with the network quality of service control and end-to-end quality of service control technology, built the wireless video surveillance platform mixed QoS control.The system had set up a special database and its services for mixed explosives vehicles.In order to establish wireless video and data transmission based on GPRS/3G network, the platform adjusted the network structure and optimized network equipment on the QoS control.After the platform built, the mix explosive vehicles can stably transmit the real-time video and data through GPRS/3G network to the user.
    The Dynamic Management System of Many Type Ore Blending in Sandaozhuang Open-pit Mine
    WANG Xiao-Ting, LU Cai-Wu, ZHANG Ying-Chun, JING Shi-Gun
    2012, 41(08):  98-102. 
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    In view of multiple kinds of minerals participating in ore blending at present in Sandaozhuang open pit, the dynamic management system of ore blending involved Molybdenum and Tungsten in Sandaozhuang open pit has designed and realized using GIS, GPS and GPRS.According to the milling grade of Molybdenum and Tungsten in production process, the system can automatically obtain the grades of ore loaded on the shovel, and realize the automatic generation of everyday ore blending production plan and the intelligent distribution of ore blending task.Experiments on real scenes show that this system's performance is stable, and it can satisfy production request of ore blending in Sandaozhuang open-pit mine.
    Application of ST3- D Hydraulic Pressure Station in the Mine Promotion Braking System
    SUN Hai-Jun, ZHAO Ai-Ming, JI Jian-Ping, ZHANG Yun
    2012, 41(08):  103-105. 
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    Mine promotion is an important key in the process of production, and braking system is the safeguard in the process of promotion.Based on the study of hydraulic disc brake system produced in West Magnitogorsk used in Xingshan mine main shaft, the working principle of the brake system was introduced in detail, and ST3- D hydraulic station and its working process of the main valve was analyses deeply.
    Develop Design and Application of 6 m3 Bottom-side Discharging Lorry
    SHI Xie-Sheng, NING Yu, YUAN Yang, NI Ming, LI Ming-Jing
    2012, 41(08):  106-107+122. 
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    According to the situation of some middle and large mine using the 4 m3 and 10 m3 discharging lorry, 6 m3 bottom-side discharging lorry was developed and designed.Some main design, improved points and operating result were introduced.Lorry steering radius is 25 m/min, and it is suitable for the ore transport in large and medium-sized main mine.
    The PID Control for the Speed of Pulling Hose used on Underground Explosive Loading Truck for Upward Middle-Deep Blasting Hole
    HUANG Xiao-Wei, YIN Fu-Chen, DUAN Ren-Jun, SUN Da-Lun
    2012, 41(08):  108-111. 
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    Based on the proportional flow valve as hydraulic motor flow control element and the multiturn rotary encoder as motor speed feedback link, the closed-loop control system of electro-hydraulic proportional valve controlled motor speed was constituted.For the realization of stability control for the speed of pulling hose, PID control strategy is proposed to optimize the design for control system.Focus on the problems of speed stability, a proportional valve controlled motor hydraulic system mathematical model was established and the software package SIMULINK in the MATLAB software was used to simulated the system dynamic.The results show that the system using control strategy has faster response, less overshoot than the original system, and it has overcome the speed instability during the charge process, which can meet the control requirements.
    Modeling and Simulation of Comminution with High-Pressure Grinding Rolls Based on Data Obtained from Production
    LIU Jian-Yuan
    2012, 41(08):  112-117. 
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    The modeling of comminution with high-pressure grinding rolls (HPGR) has been carried out based on flowsheet investigation data obtained from HPGR-comminution circuit at the iron-ore processing plant of Washan.Using this comminution model together with the classification model represented by a partitioning curve, a simulation study has been done for the closed-circuit operations of the HPGR with 3 mm screening.The result shows the effectiveness and the practicability of this modeling approach for the HPGR-comminution.
    Design and Experimental Study of Pre-mill Fuzzy Control System
    LUO Xiao-Yan, LIN He-Rong
    2012, 41(08):  118-122. 
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    Against the problems of ore grinding machine, because of the comparatively simplification of control model, low control precision and relatively poor efficiency and quality, a control model for a pre-grinding process is designed by fuzzy controlling algorithm.According to fuzzy control theory, two fuzzy controllers are designed on the basis of corresponding fuzzy rules of the feeding and the spindle speed, and a double-input and double-output fuzzy control system is formed after two fuzzy controllers are connect in parallel.Taking the RM500 pre-mill developed by Jiangxi University of Science and Technology as prototype, the simulation by Matlab shows that the pre-grinding system static and dynamic properties, adaptivity and robustness by fuzzy control are more superior than that of the conventional PID control.The pre-grinding experiment on tungsten ore indicates that working stability and product quality of the pre-mill are evidently improved by using fuzzy control system.
    Optimization Design of Abrasive Wheel of Vertical Roller Mill Based on ANSYS
    FU Qun-Feng, CHENG Peng, MEI Feng-Yi
    2012, 41(08):  123-125. 
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    Carried out the research into optimized design to abrasive wheel that is one of the main parts of the LM8×2 vertical roller mill by ANSYS.First, carried on topology optimization to abrasive wheel, definition the best shape and major optimized dimensions, and determined the direction of the optimization of the abrasive wheel.Later, according to the data of abbrasive wheel about topology optimization carried on size optimization, trying to keep constant of maximum stress and displacement of abbrasive wheel, as far as possible the reduction of the weight of abbrasive wheel.Analysis results show that the weight of the applications reduce for 3.332 t at least, under keep constant of maximum stress and displacement condition.
    Real-time AE Monitoring System in Goaf
    欧Yang-Zhi-Hua , XIAO Shu, ZHOU Feng-Xing, CHEN Ji-Hai
    2012, 41(08):  126-129. 
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    Development of Real-time AE monitoring system is based on practice of long-term AE monitoring goafs in small underground mines of eastern Hubei.The low cost instrument has such function: managing the system via IE interface, collecting AE signals in real time and removing manual fake data input with ROM data storage.The system is composed of a WUST AE instrument and a platform of data collection and analysis.Data can be transmitted not only through the network of XBEE wireless and wire direction connection but also manual carry to a host computer.Data analysis of the platform may predict stability of goafs.Managers can log in the system via a web browser and make a timely response to abnormal situations of goafs.
    A New Type of Underground Air Compressor Artificial Refrigeration System
    REN Sen
    2012, 41(08):  130-132+141. 
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    A new type of artificial refrigeration system is proposed based on engineering thermodynamics and heat transfer theory, it combined with the actual situation of underground mine.The cooling system consists of a set of air-compression refrigeration device and many heat exchanger hydrations.There is an air pipe in the hydration in serpentine way, and air flows in the pipe, with other cooling device to complete the work cycle.Surrounding rock covered by a layer of thermal insulation materials, and the heat exchanger hydrations installed on the top of this layer of insulation material.The system not only reduces the airflow temperature through convective heat transfer between underground airflow and the heat exchanger hydrations, but also effective barrier surrounding rock heat.Change radioactive heat transfer between the high-temperature surrounding rock and the human bodies into radioactive heat transfer between the low temperature heat exchanger hydrations and the human bodies.Therefore, the cooling effect is good.Refrigerant air itself is cheap and non-toxic.
    Safety Influence Factors Analysis of Mining Area Ecological Environment Based on the ISM Method
    LIU Lie-Wu, SONG Huan-Bin
    2012, 41(08):  133-137. 
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    The exploitation of mineral resources on the surrounding ecological environment is increasingly serious.The mining area ecological environment security is receiving increasing attention.There are many factors of influence on mine ecological environment safety and the mechanism of action is complex.Therefore, looking for the latent structure and the key variables is the most basic problem to solve the mine ecological environment safety.Application the interpretative structural modeling method of system engineering to analysis the factors of influence on the mine ecological environment safety, the interpret structure model was established.According to the key factors, countermeasures were proposed .
    Ensemble Kalman Filter Prediction Model of Old Goaf Residual Subsidence
    MI Li-Qian, CHA Jian-Feng, WANG Xin
    2012, 41(08):  138-141. 
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    With respect to the uncertainty process in goaf residual subsidence, the Ensemble Kalman Filter (EnKF) was introduced, the coal mine deformation was treated as a dynamic stochastic system and a new prediction model named Ensemble Kalman Filter model was proposed.Then the ensemble Kalman filter predicted value was compared with the original measured data.The numerical example shows that the ensemble Kalman filter model can effectively deal with the measured data polluted by noise.It proves that the prediction effect of Ensemble Kalman Filter is good, and Ensemble Kalman Filter offers a new way to predict the goaf residual subsidence.
    Study on the Effect of Oxygen Supplementation for Tunneling Workers of Plateau Mine
    JIA Yan-Xiang, LIU Ying-Shu, LIU Wen-Hai, LI Hu, WANG Hai-Hong
    2012, 41(08):  142-146. 
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    Selected heading face miners of a plateau mine with oxygen supplementation of diffusion, with oxygen supplementation of carrying oxygen bottle with breathing mask and without oxygen supplementation, in addition to oxygen supplementation the miners worked as usual.Designed face oxygen supply system of diffusion, while set 4 objective signs and 8 observation signs for qualitative and quantitative analysis the effect of oxygen supplementation.The partial pressure of oxygen had changed after face oxygen supplementation of diffusion, and drew the distribution curve of it.Using objective signs and observation signs to comprehensive study on the effect of oxygen supplementation for plateau mine, the results show that oxygen supplementation could improve the oxygen saturation, reduce the pulse rate and the number of breaths per minute of tunneling workers; physiological function of human body enhanced, body discomfort symptoms obviously improved; in general, oxygen supplying way of diffusion was more suitable for oxygen supplementation of plateau mine.
    The Eastern Dump of Yunnan Hualian zinc indium Rolling Stones Disaster Prevention Research
    LI Cheng, DUAN Wei-Ping, DOU Xiao-Feng
    2012, 41(08):  147-149. 
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    The basis of Analysis Dump Rolling Stones movement form,and simplified Rolling motion model, starting from the kinematic point of view, summed up the equations for calculating for rolling and jumping of rolling stone. The study of the eastern Dump Rolling Stones of Yunnan Hualian zinc-indium, The results show that The calculation and measured values of rolling distance close to jump height when using this method , and there is a certain security reserve, so this method is able to provide a reference for the design and construction of the dump Rolling disaster prevention.
    Design of Parameter Compressed-air Self-help System in Metal Mine
    LI Lei, HUANG Yuan-Yue, BAO Hai-Zhong
    2012, 41(08):  150-152. 
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    In order to improve the construction of six old systems, according to the safety administration issued a forced air self-rescue system specification, combination of Xiadian gold mine pressure wind construction actual situation, the mine ventilation and fluid machinery pipeline for check, analysis of wind pressure and air volume, the downhole pressure wind pipeline reasonable parameters were obtained.According to the actual situation of underground mining set the compressed-air self-help system, forced air self-rescue system for underground personnel in distress was perfected.And it provides effective protection for survivors in emergency.
    Remediation of Heavy Metals Contaminated Soil by Sepiolite and Mycorrhiza
    YANG Xiu-Min, YANG Chun-Xia, YAN Ai-Bo
    2012, 41(08):  153-155+159. 
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    Pot experiments were carried out to study the effects of single treatment or combination treatment of adding sepiolite and mycorrhizal Glomus mosseae, Glomus intraradices in Pb、Zn and Cd contaminated soil on corn growth and concentrations of heavy metals in corn.The results show that the co-treatment of sepiolite and mycorrhizal Glomus intraradice can significantly increase dry weights of terraneous part and subterraneous part of corn.Compared with the single treatment with sepiolite or mycorrhiza, the mycorrhizal infection rates increased by 44.53% to 58.80% for co-treatment（sepiolite+Glomus mosseae and sepiolite+Glomus intraradice）.Sepiolite can effectively block the transference of heavy metal in soil-plant system, and decrease concentrations of heavy metals in corn.On the other hand, mycorrhizal Glomus mosseae and Glomus intraradices can promote the enrichment of heavy metals in corn.Therefore, the heavy metals Pb、Cd、Zn can be removed form contaminated soil using two kinds of mycorrhiza and non-economic Crops.
    Numerical Calculation of Tailings Dam-break and its Influence on Downstream Areas
    YUAN Zi-You
    2012, 41(08):  156-159. 
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    The tailings dam-break is similar to the reservoir dam-break and the outbreak of the mountain debris flow in the project conditions.Using the project analog method, drawing on research results both the reservoir dam-break and the mountain debris flow, with tailings dam-break its own characteristics, according to the case for gradual dam-break, appropriate adjustments to the original model, getting calculation formulas of peak flow, maximum peak flow downstream along the way and flood peak height from the dam site, giving the time formula the maximum peak flow reached.The formulas are applied to practical project.The results provide sufficient data for the dam-break downstream impact analysis, and it is the necessary data for tailings dam design and management.It provides the theoretical basis for site selection of tailings dam.
    Discussions on the Comprehensive Utilization of Hanyin Gold Mine Tailings
    CHEN Ping
    2012, 41(08):  160-163. 
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    According to the characters of hanyin gold tailings, some new ways for comprehensive utilization of the tailings are discussed.It includes reclaiming gold, making wall brick, preparing foam glass, crystallite glass and ceramic proppants for oil hydraulic fhcture.Meanwhile, the prospects of the gold tailings as filling materials, road materials and reclamation soil were discussed.These technologies can realize the non-waste mine and concentrated resources use.The effective reclaiming and utilization of gold mine tailings will not only reduce the output of solid wastes, but also enhance utilization ratios of resource and energy.This will make not only economic benefits, but also environmental and social benefits.
    Experiment of Iron Removal by Flotation from the Quartz sand Produced by the Slag of Kaolin in Guangxi
    HU Ting-Hai, GAO Hui-Min, GUAN Jun-Fang, ZHANG Ling-Yan, REN Zi-Jie, LU Yang
    2012, 41(08):  164-167. 
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    The slag of kaolin in Guangxi after scrubbing, grinding, classification, high intensity magnetic separation, can produce the quartz sand with SiO2 99.82%, but the content of Fe2O3 is high to 113 μg/g, and the iron hosts in the mica and tourmaline.The flotation test was carried out to remove iron in the mica and tourmaline, to make the Fe2O3 content in quartz sand decrease to 80 μg/g and meet the requirements of the photovoltaic industrial.The results show that: first, mica reverse flotation was carried out in the acidic condition of pH=2.5 by using mixed amine and kerosene, and then tourmaline reverse flotation was carried out under the subalkaline condition of pH=7.8 by using sodium oleate, the final proceeds of the Fe2O3 content of the quartz sand can be reduced to 74 μg/g, the purity of SiO2 can be increased to 99.89%, and the recovery rate of SiO2 is 94.61%.