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    15 November 2011, Volume 27 Issue 11
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    Advantages,Risk and Countermeasures of the Online Trade of Mining Rights
    GONG Xing-Xiang
    2011, 27(11):  1-4. 
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    Compared with traditional trading patterns,the online trade of mining rights has some inimitable advantages such as convenience,rapidity,efficiency and so on,and because of bidders could not see each others,problems like collusion,break transaction order,artificial disturbance and so on could avoided efficiently,therefore could ensure the open and fair of mining rights trading better.However,because of virtual characteristic of network,the stability of system,prevention measures and security management and other factors also influence the online trade of mining rights,certain security risk is exist.So,we must take corresponding measures to strengthen management,to ensure safe and stable operation of online trade of mining rights.
    Study on Failure Process of Rock Sample with Holes
    ZHAO Wu-Kun, DIAO Hu, DAI Yong-Xin, LI Ru-Zhong
    2011, 27(11):  5-8. 
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    Rocks were typical inhomogeneous brittle materials with abundant various deficiencies inside and will generate plenty of acoustic emission signals during damage process under loading.On the condition of uniaxial loading in laboratory,fracture mechanism and behavior characteristic during failure process of rock sample with different number of holes were studied by apply sound emission monitoring system and stress analyzing software(the 3D failure process analytic system of rock samples,RFPA3D).
    Analysis and Evaluation on Influence Factors of Kriging Estimation
    CHEN Dao-Gui, LI Jian-Feng, XU Yan-Ze
    2011, 27(11):  9-12+16. 
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    Resources/reserves risk is one primary impact factor of mining industry investment risk,therefore,improving the accuracy of reserves estimation is a powerful means to reduce the investment risk.On repect of enhancing credible / reliable precision of mineral resources/reserves estimation,Kriging had been used and recognized widely by advanced mines both at home and abroad.Based on the Kringing variance's computation theory equation,the impact factors of Kriging estimation were analyzed,a set of process and method of Kringing variance influence facotrs weighing evaluation was proposed.Took a gold mine as a example,Kriging variance influence evaluation model and judgment matrix were constructed by adopt analytical hierarchy process,and calculation was done by using MATLAB method,each weight of influence factors was obtained.Reserves estimation practice of many mines proved,through the optimized regulation of key influence factors,resources/reserves estimation precision could increased essentially.
    Research on Mineral Processing Technology of a Complex Copper-nickel Ore
    HU Zhen-Feng
    2011, 27(11):  13-16. 
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    Experimental research on a complex copper-nickel ore in Xinjiang has been done to recovery copper and nickel.Comparison tests for removing talc in advance-bulk flotation of Cu and Ni-separating Cu and Ni flowsheet and bulk flotation of Cu and Ni-separating Cu and Ni flowsheet were done.The bulk flotation of Cu and Ni-separating Cu and Ni flowsheet was used to recovery coper and nickel.The results of closed-circuit tests were as followings:copper concentrate containing 20.19% of Cu and 0.75% of Ni with copper recovery 66.09% ,and nickel concentrate containing 6.36% of Ni and 0.95% of Cu with nickel recovery 80.43%.
    Beneficiation Test of A Iron-Sulfur-Copper Polymetallic Ores
    YUAN Qi-Dong
    2011, 27(11):  17-23. 
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    Studied the characteristic of a iron-sulfur-copper polymetallic ores from Anhui province and found the complicated dissemination between iron,sulfur and copper,rough and fine uneven disseminated size.Taking stage grinding to primary ores,and group technology of magnetic separation and flotation,can get the iron concentrate with grade at 66.08%,sulfur grade at 0.148%,recovery at 81.09%; sulfur-copper complex concentrate with S grade at 41.27%,S recovery at 75.08%.According to the test results,recommend the experiment process as stage grinding-low intensity magnetic separation-sulfur-copper bulk flotation-desulfurization of iron concentrate.
    Cyanide Leaching Test and Production Practice of Gold Bearing Molybdenum Concentrate
    FENG Hui-Jun
    2011, 27(11):  24-26+46. 
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    According to the high oxydation degree of molybdenum bearing gold concentrate,taking preferential flotation of molybdenum sulfide and then molybdena,enrich gold in molybdenum sucfide conceutrate.Comprehensive recovery Associated gold by the technological flowsheet of grinding， Cyanide leaching,solid-liquid separation,Zinc wire replacement,and increase product added value.
    Saturation Line Prediction of Tailings Dam based on Grey Model （1,1）
    ZOU Wei-Xia, LI Hui-Min
    2011, 27(11):  27-29. 
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    Control of saturation line is one of important points in tailing dam monitoring,which plays an important role in tailing dam safety.Selected historical data from monitoring data of tailing dam,a kind of saturation line prediction method of GM(1，1) grey prediction model which generated base on accumulation was proposed,prediction model was established.The consequence indicated this mothod had advantages like less data needed,high precision modeling,simple,practical and others,could predict saturation line height accurately,helpful to the increase of tailing dam safety level.
    Microcosmic Mechanism of Diatomite-Cellulose Composite Fiber Modified Asphalt
    CHEN Xiao-Long, HAN Yue-Xin, WANG Cheng-Liang, SUN Yong-Sheng
    2011, 27(11):  30-33+60. 
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    The modified asphalt was prepared by adding different mixing amounts of diatomite-cellulose composite fiber.In order to research the modified mechanism,the microstructure of matrix asphalt and DCCF modified asphalt was analyzed by FT-IR and DSC.The results showed that there was no chemical reaction between DCCF and matrix asphalt.The DCCF uniformly dispersed in the asphalt,and selectively adsorbed components of asphalt,making the colloform texture of asphalt retuned,the form and quantity of some components in asphalt changed.These changes altered the microstructure of asphalt and decreased amount of the congeries state.Thus the temperature susceptibility of the DCCF-modified asphalt was improved obviously.DCCF modifying asphalt was a physical enchase blending process,during which the microstructure of asphalt was improved.
    厚大破碎矿体|采矿方法|水压支柱|小型挖机|上向进路充填
    LIU Fang-Qiu, FENG Yi, ZHENG Jian-Hong
    2011, 27(11):  56-57+74. 
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