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Table of Content

    15 May 2012, Volume 28 Issue 05
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    Application of Layering Open Stope Afterwards Cemented Rockfill Mining Method
    ZHANG Cheng-Ming, DOU Guang-Wen
    2012, 28(05):  1-3+20. 
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    Upward type horizontal sub-level cemented filling mining method has been adopted in 14-5# ore body of Laochang tin ore, but a series of problems exposed. Through adoption of layering open stope afterwards cemented rockfill mining method, slope structural parameters were optimized, problems were solved and good economic effects was obtained.
    Preliminary Discussion of Excavating Plant Reconstruct into Tailing Pond after Ending of the Mining
    ZHOU Li-Hui, FAN Li-Chao, WANG Wei-Zhi
    2012, 28(05):  4-5+8. 
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    Aiming at situation of large tailings discharge quantity, short of storage capacity, land expropriation is difficult if build new tailing pond in China, technical scheme of open pit change to underground mine and using Mined-out open pit  to discharge tailings was proposed. In the practical situation of Chengde Heishan iron ore, preliminary discussion was done on scheme of 1#excavating plant of Heishan iron ore reconstructed into tailing pond.
    Experimental Study on Rock Drilling Blast Parameter Optimization of Beiminghe Iron Ore
    WENG Sheng-Jun, HE Rong-Xing, YU Qi
    2012, 28(05):  6-8. 
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    Macrostructure parameter pillarless sublevel caving has been adopted in mining of Beiminghe iron ore, while problem of bad blast effects always exist in production, main present as high boulder yield, high accident rate of pushing-wall and hanging arch, and low recovery rate of single-row ore. After the study, little furnace hole angle, dense blasthole, narrow ore drawing port are the main reason to the above problems. Double rock drilling center experiment plan with 57°furnace hole angle was proposed and industrial experimental was done, better effects was obtained on blast effects improving and enhance ore recovery rate.
    Mining Laneway High-speed Drivage Technology under CompoundSoft-rock Roof and Floor Finite Deformation
    YE Ping, CAO Jing, QIN Guang-Peng
    2012, 28(05):  9-11. 
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    Selection and equipment was done on tunnelling machinery, mechanized operating line was equipped based on current technical force of mine, drivage technology was optimized, parallel operation mode was adopted in construction organization, thus high-speed drivage of mining laneway under geological condition of compound soft-rock was realized, difficult mine connection problem was solved effectively.
    Flotation Tests of Guizhou Hezhang Oolitic Hematite
    LIU Si-Dong, ZHANG Jin-Zhu, XU Hong-Yan
    2012, 28(05):  12-13. 
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    For Guizhou Hezhang Oolitic Hematite,made experimental study on fineness of grinding mineral products, Collectors choice and dosage, Inhibitor content. The results show that when fineness of grinding minerals is -0.074 mm of 85%, roughing combined collector GE-609 and RAP-138 is 200 g/t respectively, doseage of starch is 1 400 g/t, adopt one time reverse-floating roughing processes, and obtain Iron ore concentrate which iron grade is 57.82%, recovery rate is 73.69% ,Phosphorus is 0.22%.
    Study on Granulation—Gas Based Magnetic Roasting Technology for Low Grade Limonite
    HUANG Zhu-Cheng, TIAN Shi-You, JIANG Tao
    2012, 28(05):  14-16. 
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    For a low grade limonite iron(30.16%), Experimental study adopted Granulation—Gas based Magnetic Roasting—Magnetic separation Technology. Magnetization roasting conditions: ball grain for 5~2 mm, mixed gas CO, and CO2, and N2 volume than for 1∶2∶2, magnetization roasting material layer thickness for 200 mm, roasting temperature for 725 ℃, insulation time for 10 min. Magnetic Sorting criteria: grinding fineness to -0.074 mm for 85%, weak magnetic field strength for 100 kA/m.Iron grade 59.78% and recovery 86.19% concentrate can be received.
    Influence Factors of Refractory Gold Ore Dressing and Smelting in the process mineralogy
    MA Chi, BIAN Xiao-Dong, WANG Shou-Jing
    2012, 28(05):  17-20. 
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    Summarized the classification refractory gold ore, and  the main factors of process mineralogy which affect result of the mineral processing and metallurgical testing. By the example analysis of  refractory gold ore, described the process mineralogy of contents and methods, This provides an important reference for the mineral processing and metallurgical testing.
    Laneway Classification Support Study base on Fuzzy Clustering Analysis
    CHEN Guo-Tao, SUN Li-Min, DONG Shan
    2012, 28(05):  21-24+85. 
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    Effective and precise fuzzy clustering analysis was done on ore-rock with complicated lithology of different section in laneway by using Excel software, ore-rock of different sampling section was divided into 3 kinds. Relevant support plan was proposed to each kinds of ore-rock laneway based on classification results, better effects was obtained of classification support plan, and finally laneway classification support standard was formed, anytime classification and reliable support of laneway were realized, provided scientific decision basis for mine laneway support.
    Seepage Stability Analysis of Elevation and Expansion of Manshanhong Tailings Dam
    LI Fu-Sheng, HOU Hong-Bin, QIN Hong, LIAO Zhi-Li
    2012, 28(05):  25-27+88. 
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    Tailings dam is a structure which pile up metal and nonmetal and other mine beneficiation waste, the quality and dam height has increased rapidly with country's great demanding for mineral resources. Tailing dam situation and two situations of final accumulation elevation height were checked, seepage and static force stability calculation were done at relevant most disadvantageous section position of two conditions. Meanwhile, using two-dimensional finite element  to calculate seepage line of sloping surface, dam situation and stable safe factor of after elevation and expansion were analyzed by adopted limit equilibrium method . Calculation results indicated, stable safe factors of dam final accumulation elevation height section were all meet the standard requirement under different calculation condition, which proved the safe and reliable of elevation and expansion scheme of fill dam.
    Numerical Simulation on Deep Laneway Surrounding Rock Deformation based on FLAC3D
    SHANG Yu-Hang, DAN Qi-Yuan, XIE Lan-Kui, GUO Gang
    2012, 28(05):  28-29+138. 
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    Numerical simulation was done on deep laneway surrounding rock deformation of Dongrong No.2 mine by using FLAC3D with theory directive function at a certain degree, it could be observed from analysis result that spray anchor note support could control surrounding rock deformation effectively, improve laneway surrounding rock stress distribution, reduce displacement amount of laneway, enhance strength of surrounding rock and self-bearing ability, support structure long-time stable could solve deep crush roadway surrounding rock deformation controlling problem well.
    Practice of Slope Protection by Blast Control
    CHEN Guo-Qiang, CHENG Shi-Hu
    2012, 28(05):  30-31+64. 
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    Through the practice application of Xiyuanling side slope of Dexing copper mine adopt blast control to protect slope, main factors which affect blast effect and problems should be pay attention in practice were pointed out, which proved blast control was a well-proven method to enhance slope stability of strip mine.
    New Technology of Treating High Concentration COD Waste Water from Metallurgie Industry
    PAN Xu-Fang
    2012, 28(05):  32-34+55. 
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    Metallurgy silicon steel production process needs to adopt a coating, oil film protection technology, this will produce a lot of silicon steel coatings wastewater, the COD of the wastewater is much high and with bad biochemical, so the method of treatment technology is difficult to ensure normal water drainage standard. This research introducd a new type of water treatment technology which effectively solved the problem of waste water treatment high concentration COD.
    铜镍矿|成矿条件|分析|江苏泗洪
    SHI Jian-Bin, WANG Guo-Qiang, LIU Zheng-Jiang, JING Jia-Jun, ZHANG Qi
    2012, 28(05):  50-52+119. 
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