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Table of Content

    15 October 2012, Volume 28 Issue 10
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    Resource Utilization and Disposal of Mine Solid Waste in China
    ZHANG Li-Zhen, ZHAO Heng-Qin, MA Hua-Long, TAN Xiu-Min, ZHANG Yao
    2012, 28(10):  1-5. 
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    Discharge and piling amount of mine solid waste are great in China, not only have occupied a large number of land resources and polluted environment seriously, but also led to resources waste for tailings, waste rock and coal gangue and so on content a large number of available metal and nonmetal mineral resources. If that could be recovered and reused, it would increase economic benefits and improve mining environment effectively, reduce secondary pollution, and the ecological environment benefit would be remarkable. Resources survey and the harm of mine solid waste in China were summarized, resources utilization and harmless treatment and final disposal status of mine solid waste were summarized, problems existed in resources utilization of solid waste were analyzed and corresponding countermeasures were proposed.
    Evaluation on Sustainable Exploitation and Utilization of Mineral Resources in -Guilin City based on Network Analysis
    QIN Chu-Li, WU Guo-Quan, QIN Chu-Jian
    2012, 28(10):  6-10+37. 
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    Based on the  brief description of research of sustainable exploitation and utilization of mineral resources of both at home and abroad, it was more scientific and practical to build evaluation indexes system and model of sustainable exploitation and utilization of mineral resources using network analysis, each index and system was quantified, analyzed and evaluated by using this system and method, to indicate the capacity for sustainable exploitation and utilization of mineral resources in Guilin.
    Open-pit Mine Exploitation based on 3DMine Software
    ZHONG De-Yun, HU Liu-Qing, WU Guo-Dong
    2012, 28(10):  11-14. 
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    Took Duobaoshan Copper Mine as a example, 3d mine model was established by using mine existing data, open pit limit optimization, stope design and stripping plan compilation were done, open pit mining visual management system was built, which would effectively direct the compilation of mining plan and production management, feasibility and scientific of modeling results were analyzed based on engineering practical application. On the basis of digital mine structure, visual solve scheme of open-pit mine was discussed, provided effective integrated system for construction of digital mine.
    Isolation Layer Thickness Confirmation of Mining Transition Period of Axi Gold Mine
    LI Zhen-Zhen
    2012, 28(10):  15-17. 
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    Aiming at the requirement of transition period of Axi Gold Mine of Xinjiang, isolation layer thickness of transition period was calculated by adopted five different kinds of transition layer thickness calculation method, isolation layer thickness which met the production requirement of Axi gold mine was confirmed after each calculation result consideration.
    Stability Analysis on Production Process of a Open-pit Mine
    CHEN Li-Qiang, ZHANG Zhi-Jun, WANG Ya-Jun
    2012, 28(10):  18-23. 
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    By analysis of daily ore yield and calculated grade data of a open-pit mine in the 2010 and 2011 year, characteristic values and confidence degree of data were analyzed and hypothesis tested, changes between 2011 and 2010 year were analyzed through failure rate function，existing problems in current production process and reliability changes of process were obtained, and operational recommendations were proposed.
    Analysis on Blasting Vibration Signals of Open Pit Mine based on HHT Method
    WANG Fu-Yuan, QU Shi-Jie, SHEN Xu-Peng, YI Fang
    2012, 28(10):  24-27. 
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    The processing technology of blasting vibration signals has been an important subject in current blasting vibration study field. Based on the monitoring of blasting vibration of an open pit mine, blasting vibration signals were analyzed by using Hilbert-Huang transform(HHT). Signals were decomposed into several IMF components which contain different components through EMD, Hilbert transform was done on each component, then drew the graphics of signal spectra, instantaneous energy, contour energy and so on in order to get the characteristics of time-frequency and energy distribution of the vibration signals.
    Research on Beneficiation-Cyanide leaching of a Refraetory Gold Ore
    CAO Jin-Cheng, 吕Liang , CAO Fei, YUE Tie-Bing
    2012, 28(10):  28-30+37. 
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    The efficient utilization of a refractory gold ore was investigated. The results indicated that gold concentrate containing gold 54.20 g/t at recovery of 73.23% and tailing containing gold 1.43 g/t could be obtained by flotation. Cyanide leaching process was used to treated the gold concentrate and tailing. Pregnant solution with recovery of 53.49% and leaching slag of gold concentrate at recovery of 36.21% were produced. The total recovery of gold could reach 89.70%. The process of flotation and cyanide leaching provides scheme for developing and utilizing of this refractory gold ore.
    Experimental Study on a Low Grade Copper-Nickel Ore from Guangxi Province
    ZHU Bin, WEI Xin-Yan, HUO Xi-Xiao
    2012, 28(10):  31-34. 
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    A lowgrade copper-nickel ore from Guangxi contains Cu 0.11％and Ni 0.18％, which mainly exist in the form of pentlandite and chalcopyrite respectively. Under the detail conditions testes, got the better dressing indexes by the untied flowsheet of flotation-magnetic separation. The yield of copper-nickel concentrate achieved 1.83%, the grade of Cu, Ni, Co, Ag each was 4.81%, 7.34%, 0.31%, 230.60 g/t; the recovery of Cu, Ni, Co, Ag each was 88.69%, 80.12%, 55.76%, 78.75%.
    Research on Stope Mining Pressure Change Law of Stope of Shuiyindong Gold Mine
    LI Lin, YANG Fang, LI Hua, HUANG Gun
    2012, 28(10):  35-37. 
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    Through the site monitoring of 506 stope mining pressure in 124 0 m middle-section of Shuiyindong Gold Mine, graph of 506 stope pressure with working time and working face advance was drawn and analyzed, compared and studied, mine pressure change law of 506 stope was revealed, 6 m was the most length of working face advance confirmed. Numerical simulation and stope support economic comparing were done on 506 stope combined with geological data using FLAC software, making sure that the 6m was the safe spacing in production as well as reducing cost greatly.
    Numerical Simulation on the Stability of Stope Surrounding Rock Mass in Qijiang Iron Mine
    LI Fu-Sheng, QIN Hong, HOU Hong-Bin, LIAO Zhi-Li
    2012, 28(10):  38-40. 
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    Take the stability of Whitehead Lake iron ore mine Qijiang 12 stages of the roof and floor and pillar as an example，rock mechanical parameters were obtained through uniaxial tensile，uniaxial compression and triaxial compression testsIt can be input as the mechanical parameters of numerical simulationWorking face of the 12 stages was simulated by ANSYS. Stress and strain to determine the most concentrated region，and the distribution of plastic region and monitoring the size and the various points of the changes in vertical displacementIt can improve stress distribution in the process of excavation，and it can also provide a basis for strengthening the region and determine the excavation scheme rationality.
    Analysis on Mechanical Properties of Three-element Arch Development Roadway of  Different Middle Part of Deep Mining
    ZHANG Han, WANG Da-Yong, ZHU Wei
    2012, 28(10):  41-42. 
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    Because of the high stress characteristics, after entered into stage of deep roadway driving of Qingcaichong Mine of Mine Company of Kailin Group, deformation and anchor shotcrete layer collapse phenomenon were serious after roadway driving supporting, through finite element numerical calculation was done on roadway of drivingthree-element arch section of different middle part, analyzed the stress characteristics of different tunnelling footage, provided technical support for deep roadway driving.
    Observation and Analysis on Displacement Convergence of Red Shale Chamber Cross Section of Yongshaba Mine
    WANG Da-Yong
    2012, 28(10):  43-44. 
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    Red shale of Yongshaba Mine of Guizhou Kailin Group is layered rock mass of gentle inclined, bedding plane angle scope is 0°~45°. Initial deformation amount of surrounding rock deformation was large, increasing speed was high, and had the trend of growth rate decreases gradually with increase over time after chamber excavation, chamber surrounding rock of high stress soft nature layered rock mass had characteristics of bias and rheology, and unsupported chamber unstable deformation happened due to instability and destroy finally.