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Table of Content

    10 March 2011, Volume 40 Issue 03
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    Research on the Mechanical Mechanism of the Rock Bolt  Reinforcement Structural Systems in Deep Tunnel
    ZHU Xun-Guo
    2011, 40(03):  1-6. 
    Asbtract ( 2242 )  
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    The equations of displacement and stress for tunnel wall rock are established based on Burgers model by analyzing the stress and displacement field of deep rock tunnel.And then，the differential bolt equations for the force is established based on the load transfer mechanism，and the axial load distribution function was obtained by solving the differential equations of bolt force under the interaction between rock bolt and surrounding rock mass.The bolt axial force and the frictional resistance were calculated and analyzed.The results of analysis showed: the visco-elastic stress distribution in the surrounding rock has nothing to do with time; Surrounding rock displacement at any point in tunnel grows and tends to a certain value with the time; The bolt force agrees with the neutral point theory.At the same time，the characteristic curve between the interaction of supporting structure and the tunnel wall rock is built by analyzing the reasons for the deep rock tunnel.A new core idea of being in line with NATM is presented，which can determine the best time for the supporting structure or installation.
    Research on Energy Criterion of Thermal-mechanical Coupling Damage of Rock
    XU Xiao-Li, GAO Feng, SHEN Xiao-Ming
    2011, 40(03):  7-10. 
    Asbtract ( 2110 )  
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    Mechanical characteristics of granite under temperature (from normal to 1 200 ℃) have been researched with MTS 810 hydraulic servo system and MTS 652.02 high furnace.Theoretic expression of rock complementary energy discharge rate of visco-elastic damage by considering thermal-mechanical coupling has been derived based on irreversible thermodynamics theory.And the energy criterion of thermal-mechanical coupling damage fracture of granite has also been established.The result shows that peak strength and elastic modulus of granite decreases with rise of temperature and the complementary energy discharge rate of thermal-mechanical coupling damage increases with the rising of temperature and time.The time has great influence on rock failure process，so the time effect must be considered in theoretic analysis.The energy criterion established in this paper is more comprehensive and acceptable for dealing with rock thermal-mechanical coupling damage than the failure criterion established by traditionally single damage parameter.Research findings provide valuable basic references for solving problems of rock thermodynamics in reposition of nuclear waste，practical gasification of coal and oil shale，deep resources mining，exploitation of geothermal resources and safety withdrawal and comprehensive utilization of coal seam gas.
    Model Test Study On the Surface Subsidence Principles by  Coal Seam Mining with Different Dip Angles
    ZHENG Ru-Yu, WU Kan, CAI Lai-Liang
    2011, 40(03):  11-15. 
    Asbtract ( 1913 )  
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    The tests of similar material model based on the dip angles variation of coal seam was designed.With the aid of the close range industry photogrammetry system，the collected data are treated to obtain the surface subsidence curve with different coal seam dip angles.The difference of surface subsidence curves with the variation of dip angles of coal seam are analyzed，and the prediction model is modified based on probability integral method.The function fitting is realized by MATLAB software to obtain the new prediction model which all suitable for coal mining of gently inclined seam and steep seam.
    Experiment Research on AE Characteristics and b-value  Dynamic Characteristics of Sandstone Rock Burst
    WU Xian-Zhen, LIU Xiang-Xin, LIU Hong-Xing
    2011, 40(03):  16-18. 
    Asbtract ( 2245 )  
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    Under the uniaxial loading，the whole loading experiment of the acoustic emission (AE) for sandstones were made，and the stress-strain curve and the relation curve of AE characteristics change with time were obtained in failure process of rock burst.By choosing the times of cumulative AE events and based on the b-value variation in the relation between magnitude and frequency，the precursor information of rock burst was studied.The results show that the cumulative AE events increase rapidly and b-value continued to decline in the late stage of sandstone elastic deformation and the plastic deformation stage.Before the sandstone rock burst occurred，b-value decreased to be the lowest.The joint analysis of the time with cumulative AE events and b-value can more accurately predict the occurrence of rock burst.
    Depth Effect on Dynamic Fracture Toughness of Rock
    MAN Ke
    2011, 40(03):  19-21. 
    Asbtract ( 2012 )  
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    According to the standard testing method of ISRM，the dynamic fracture toughness for the basalt samples in different depth has been measured.And the rules of the dynamic fracture toughness increasing with the depth were obtained.And rocks in different depth have different dynamic fracture due to its different strength.
    On Refined Mining
    QU Sheng-Li, SUN Huo-Ran, LI Shao-Hui
    2011, 40(03):  22-26. 
    Asbtract ( 1756 )  
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    With the production of some abandoned mines restarting，there are many problems in the traditional mode of extensive mining during the exploration of residual ore.The way to solve these problems is to undertake the new model for exploring mineral resources-the mode of refined mining.The basic meanings and principle of refined mining are introduced，and its definition and application field are proposed.The refined mining mainly include refining the description of production target，refining the stoping scheme，refining the mining construction，refining the mining information，refining the safety control，refining the management of mining and so on.The refined mining comprehensively adopts advanced technologies in many respects，so as to acquire greatest economic benefits，environmental benefits and social benefits with the addition of refined management.
    Research of the Critical Grade to Achieve a Balance between Mining and Filling in  Integration System of Underground Mining and Beneficiation
    YUAN Zhan-Yong, SUN Huo-Ran, LI Shao-Hui, AN Long, WANG Zhi-Zhong
    2011, 40(03):  27-30. 
    Asbtract ( 2548 )  
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    The integration system of underground mining and beneficiation is an effective method for developing deep ore bodies with high efficiency，low-cost，low carbon, and it can  achieved sustainable development.Besides，this system is suitable for densely populated areas，severe cold district and the area where need strict environmental requirements.In this system，the question of the balance between mining and filling should be considered firstly，that is，all of the tailing should be used for bashing.Therefore，the critical grade to achieve a balance between mining and filling is a significant indicator to evaluate whether the system is perfect.This paper studied the affecting factors of the critical grade，and derived the general formula of the critical grade.The analysis software of the critical grade to achieve a balance between mining and filling is developed，which can work out the critical grade according to different geological，dressing and filling ratio conditions.It can also analyze the variations of the critical grade at different conditions，providing the scientific basis for the application of the integration system of underground mining and beneficiation.
    Research on the Large-scale Mechanized Mining Plan of Panel Stope in  High Phosphorus Hematite Deposit of Western Hubei
    YANG Cong-Bing, XIAO Sheng-Xiang, YAO Xin-Jie, Chen-Qing-Yun, ZHANG Guo-Lian
    2011, 40(03):  31-34. 
    Asbtract ( 1920 )  
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    The sedimentary high phosphorus hematite deposit in Western Hubei Province has a property of thin ore-bodies, slow dip, steady and huge ore reserves etc.If adopting the conventional technology and equipment to recover this type of deposits, it is difficult to realize a large-scale exploitation.To this end, the original mining design scheme is improved, proposing a comprehensive optimization program of dividing the mining field into panels, building a dump truck-based pit transport system, and setting the ore loading chambers.Then, the ore transport level (1 370 m) of the motor vehicle and the ore-drawing system of chute vibration are cancelled.These improvements can not only lower the infrastructure of 16 076.54 m3 and the investments of 10.19 million yuan, but also improve the ventilation conditions of pit transport.Hence, the production costs are lowered and the coordination and flexibility of production are enhanced, and it provides a guarantee for the safety production.
    Pit Limit Optimization of the Bayanobo Dongjielegele Deposit Area
    WANG Jie, WANG Wei-Ping, LI Jia-Quan
    2011, 40(03):  35-37. 
    Asbtract ( 1987 )  
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    According to the features of Bayanobo Dongjielegele Deposit Area in topography, ore-body occurrence and grade variation etc, Surpac software is applied to optimize the three kinds of open pit ore-bodies to maximize the economic benefit.
    Delimitation of Strata Displacement in Underground Mining of Shujigou Iron Ore
    ZHANG Fei, WANG Bin, TIAN Rui, WANG Shao-Jie, ZHANG Peng
    2011, 40(03):  38-41. 
    Asbtract ( 1825 )  
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    The underground mining of Shujigou Iron Mine led to the surface subsidence and collapse. And the subsidence pits can potentially spread to surrounding villages. In the design the engineering analogy method was used to determine the rock displacement angle. Based on the on-site survey, the numerical simulation software was adopted to make a simulation analysis research on the underground mining of the mine, and it finally get the strata displacement angle: when the upper plate of amphibolite at 62.5°, the lower plate at 62° with the strike of 65°, the movement angle is determined to be 45° at Tertiary and Quaternary System.
    Numerical Simulation On the Backfilling Effect by  Compression Rate of Gangue Backfilling
    XU Dou-Dou, GUO Guang-Li, LI Shuai, WANG Lei
    2011, 40(03):  42-45. 
    Asbtract ( 2655 )  
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    In order to analyze the effects on the laws of overlying strata destruction by changes of the compression rate of backfilling gangue，the FLAC3D was used to make a numerical simulation on the gangue backfilling mining on a mine in Yanzhou.Numerical results indicat that the movement and deformation of gangue backfilling mining are similar to that of the caving mining in thin coal.The smaller the compression rate is，the better the effect of controlling surface subsidence is.When the compression rate increases，the extremum of surface subsidence，levels of mobility，tilt value and deformation will linearly increase.The destruct height of overlying strata is linearly correlation with the compression rate of gangue backfilling.
    Computer Simulation on Surface Subsidence of Xiadian Gold Mine
    LIU Xiao-Bo, SUN Huo-Ran, LI Shao-Hui
    2011, 40(03):  46-49. 
    Asbtract ( 2083 )  
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    In view of the actual situation of Xiadian gold mine, and based on the investigation on the on-site mining methods and ground monitoring, FLAC3D is adopted to make a numerical simulation analysis on the rock movement influenced by the mined-out area.The analysis results show that under the current production conditions, no effect on the surface occurs by the mining.Meanwhile, based on temporal evolution simulation model of granular flow, the computer simulation system of surface settlement for Xiadian Gold Mine is developed, and the simulation results are given.It is believed that within the experimental range, mining has no effect on surface with the loose factor exceeded to 1.2.The computer simulation results provide a scientific basis for decision-making of the mine, and also make a good attempt for further studying the surface subsidence caused by underground mining.
    Discrete Simulation on the Step Excavation of Layered Jointed Rock Tunnel
    LI Peng, HUANG De-Yong, WENG Chun-Lin
    2011, 40(03):  50-52+94. 
    Asbtract ( 1643 )  
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    To study three-dimensional spatial variation of stress field for layered jointed rock tunnel，a calculation model was established under different partitions according to the on-site joint statistics.And the entire process of tunnel excavation step was simulated by three-dimensional discrete element method.The result showes that when the tunnel face approaches to and passes through a cross section，the influence area of the tunnel section on spatial principal stress and plane stress，was about  2.0 B（B-span length）.
    Numerical Simulation On the Pressure Relief Mining by Drilling Holes
    ZHANG Yong, XU Meng-Guo, WANG Ping, CHENG Bo
    2011, 40(03):  53-56+59. 
    Asbtract ( 1894 )  
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    The paper applies the method of drilling in both sidewall to analyze the pressure relief mining in high stress region of East-west combination area of Chengchao Iron Mine.According to the pressure relief mechanism and combining with the practical project，the numerical simulation on pressure relief mining was made to analyze the stress distribution in east-west combination area before and after the drilling.The numerical results show that pressure-relief mining with drilling can effectively make use of pressure-relief holes cutting the roadway surrounding rock and make the concentrated stress of the roadway surrounding rock transfer to the pressure relief project.Pressure of the surrounding rock would be released by space contraction of the pressure relief holes，finally the effect of reducing the pressure and deformation of roadway surrounding rocks is achieved.
    Optimization of the Open-pit Mine Blasting Parameters Based on Neural Network
    WANG Chuang-Ye, ZHANG Fei-Tian, HAN Wan-Dong
    2011, 40(03):  57-59. 
    Asbtract ( 2047 )  
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    The blasting effect is not ideal in Majiata open-pit mine, such as higher rate of blocky ore, high explosives consumption, and abundant residuals.To solve these problems, an optimization model of the open-pit mine blasting parameters based on BP neural network is built.The actual blasting parameters are applied into the model as the sample data.The tests with practical data show that the model has higher prediction accuracy.With the on-site tests and model simulation analysis, a good blasting result is obtained by using the optimized parameters.Large block rate is controlled below 2%, explosives consumption reduced from 0.41 kg/m3 to 0.37 kg/m3, blasting volume of each hole increased from 17 m3/m to 23 m3/m.
    Research on the Reduction Roasting and Synchronous Dephosphorization of Huimin High Phosphorus Iron Ore
    HE Yang, WANG Hua-Jun
    2011, 40(03):  60-62. 
    Asbtract ( 1677 )  
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    Investigation on the reduction roasting and synchronous dephosphorization for a iron mine with complex composition, fine dissemination and high content of phosphorus in Yunnan Huimin area was made to determine the appropriate temperature and time of reduction roasting, the dosage of reducing agents and dephosphorization agent.The results showed that when the mass ratio of coal and ore is 2∶5, mass ratio of dephosphorization agent and ore is 1∶2 for reduction time at 50 min and reduction temperature at 950 ℃, by which iron concentrate products with Fe grade of 93.46%,phosphorus content of 0.05% were obtained from the reduction products by grinding-low intensity magnetic separation. 
    Research on Properties and Mechanism of Dispersant for High  Phosphorus Hematite in Western Hubei
    DUAN Zheng-Yi, QIANG Min, DONG Yi-Bin, CHEN Kang, WANG Yu-Jue
    2011, 40(03):  63-65. 
    Asbtract ( 1782 )  
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    Taking the high phosphorus hematite in western Hubei as the object，tests on the dispersion effect of sludge with the type and dosage of dispersant，slurry pH value，stirring time after adding dispersant are made.The action situation of dispersant in coagulation among fine mineral particles and slime coating is studied，and the optimal dispersion conditions are given.Then，the mechanism of dispersion action and the reasons for different dispersion effect of dispersant in the tests are theoretically analyzed.
    Research on Nickel-Iron Enrichment Process by Deep Reduction and  Magnetic Separation of Laterite-nickel Ore
    LI Shu-Fei, LI Yan-Jun, HAN Yue-Xin, WANG Ya-Qin, CHEN Ming-Xue
    2011, 40(03):  66-68. 
    Asbtract ( 1872 )  
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    Investigation on the deep reduction-magnetic separation technology of laterite-nickel ore in low grade and difficult enrichment deeply discussed the effect of reduction temperature, reduction time, carbon ratio, thickness of material-beds, and particle size of coal and ores on deep reduction and magnetic separation.It was obtained that under conditions of the reduction temperature at 1 275 ℃, reduction time for 60 min, the carbon coefficient of 3, material-beds thickness of 20 mm, coal particle size of -1.5 mm and ore particle size of -2 mm, nickel-iron products with the nickel and iron grade of 4.59% and 25.12% respectively were achieved by the magnetic separation after the reduction of laterite-nickel ore.Thus, it is shown that the deep reduction-magnetic separation plays a certain role in enrichment of nickel and iron for laterite-nickel ores.
    The Rules of Bacteria in Malachite Leaching of Low Acidity
    FU Kai-Bin, LIN Hai, DONG Ying-Bo, MO Xiao-Lan, WANG Han
    2011, 40(03):  69-73. 
    Asbtract ( 1924 )  
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    In order to study the effects of bacteria in malachite leaching of low acidity (pH=2), the contrasts of the malachite leaching with acid, sterile and bacteria were made to investigate the influences of the bacteria, the initial concentration of Fe2+ on leaching, and the necessity of acid adjusting. Then the scanning electron microscope was applied to observe the changes of the mineral surface forms and the adsorption characteristics of bacteria before and after leaching, analyzing the difference of the surface composition of the leaching residue through quantitative analysis with spectral scanning. It was obtained that with the initial concentrations of bacteria and Fe2+ of 1×108/mL and 4.5 g/L separately, the bacteria own an optimum promotion on the leaching of malachite.
    Experimental Research on Beneficiation of a Yunnan Scheelite Mine
    LIN Ri-Xiao, ZHANG Fa-Ming, ZENG Qing-Jun, CHEN Zhi-Jie, ZHANG Xian-Hua
    2011, 40(03):  74-77. 
    Asbtract ( 1900 )  
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    According to the characteristics of fine-grained disseminated scheelite in run-of-mine, the scheelite was concentrated by adopting the full flotation process with sodium carbonate as regulator agent, sodium silicate as inhibitor for the gangue minerals, and ZL Pharmacy as collector. 32.34% of the coarse scheelite concentrate (WO3) with tungsten recovery of 95.32% was obtained from the raw ores with grade of 1.43%. Through the comparison tests between concentration at normal temperature and heating temperature, it was determined to concentrate the rough tungsten by heating, by which the high-quality scheelite with tungsten (WO3) of 66.16% and tungsten concentrate recovery of 91.78% was obtained.
    Research on Silver Leaching with Persulfate Oxidation-Chloride Salt
    ZHANG Ya-Hui, LI Yan, JI Ting-Ting, SHI Wei, ZHOU Chao
    2011, 40(03):  78-79+83. 
    Asbtract ( 1929 )  
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    The paper introduces a new non-cyanide silver leaching method by using Ammonium Persulfate ((NH4)2S2O8) as oxidant and Sodium Chloride (NaCl) as a complexing agent.Some conditioning tests with the concentration of (NH4)2S2O8 and NaCl，leaching temperature and time，pH value，and the mixing strength in the leaching process were made.The experimental results showed that the leaching rate of silver in silver powder reached more than 95% under conditions of 0.225% of (NH4)2S2O8，25% of NaCl，leaching temperature at 45 ℃，and stirring speed at 675 r/min for 6 h.
    Investigation on the Low Alkalinity Flotation Process for a Low Grade Copper-Molybdenum Ore
    ZHOU Feng, SUN Chun-Bao, LIU Hong-Jun, GU Zhi-Jun, MI Li-Ping, WANG Yue
    2011, 40(03):  80-83. 
    Asbtract ( 2196 )  
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    Low alkalinity flotation process is made on a low-grade porphyry Cu-Mo ore samples.In bulk flotation stage of copper-molybdenum, high quality combining inhibitors CS were adopted to separate copper and sulfur at low alkalinity (pH=7~8), with a higher recovery rate of associated molybdenum achieved.In Cu-Mo separation flotation stage, the new inhibitor BK510 instead of Na2S was adopted to realize the inhibition of high content of secondary copper.A good Cu-Mo separation effect was achieved at low alkalinity (pH=8~9).In closed-circuit laboratory tests, molybdenum concentrate with molybdenum grade of 46.21% and recovery of 84.01%, and copper concentrate with copper grade of 24.61% and recovery of 89.25% were obtained. 
    Comparison of Biological Oxidation and Chemical Oxidation of Sphalerite
    JIANG Lei
    2011, 40(03):  84-86+98. 
    Asbtract ( 2163 )  
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    The roles of thiobacillus ferrooxidans in biological oxidation of sphalerite was studied, which was compared with the process of Fe3+ oxidation. The studies showed that Fe3+ has a higher oxidation efficiency than the bacteria, but the efficiency of bio-oxidation is more stable. In biological oxidation process of sphalerite, thiobacillus ferrooxidans experiences delay period, exponential phase, stable phase and decline stage in its growth. Some of bacterial attach to the mineral surface, but no precipitation of intermediate sulfur is appeared. While, in the chemical oxidation of sphalerite, a large number of sulfur are settled on the mineral surface, indicating that the biological oxidation is more thorough.
    Research on the Performance of New Collector TR in Reverse Flotation of Bauxite
    ZHOU Su-Yang, SUN Wei, CHEN Pan, LI Chang-Kai, MENG Xiang-Li
    2011, 40(03):  87-89. 
    Asbtract ( 1841 )  
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    The comparative study on flotation performance between the new collector TR and the traditional collector of 1231 for reverse flotation of bauxite was made to reveal that TR can realize the reverse flotation separation of kaolinite and diaspore in a wide range of pH value without any adjustment agent added.Moreover, TR consumption can also be lowed by about 50% than 1231.With the conventional adjustment agents, TR made the Al-Si ratio of concentrate at 10.13 and recovery of 77.14%, which are much better than by 1231 as the collector.As well, the concentrate has less foam and is easily defoaming.
    Influence of Regulator and the Adding Order of Sodium Oleate to the Flotation of Silicate Minerals
    LIU Fang, SUN Chuan-Yao
    2011, 40(03):  90-94. 
    Asbtract ( 1815 )  
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    Taking high-purity and non-polluted silicate minerals and quartz as the flotation targets, sodium oleate and metal cations as the collector and regulator, the variation rules of the flotation recovery of garnet, davidsonite, spodumene, hornblende, mica, feldspar and quartz with the dosage of metal ions Fe3+，Al3+，Pb2+ and Cu2+ increasing are investigated under the adding order exchange of metal cations and sodium oleate. 
    Influence of Reagent Species on Graphite Purification with Roasting Alkali-acid Method
    GE Peng, WANG Hua-Jun, ZHANG Qiang
    2011, 40(03):  95-98. 
    Asbtract ( 1974 )  
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    A brief description on the primary principle of graphite purification in alkali-acid method and correlated response occurring in roasting process was given.The paper mainly discussed the influence of reagent species in roasting on graphite purification，and the differences among different agents at various temperatures.An attempt was made on purifying graphite in other reagents.It was analyzed by theory that the reagent species have a great effect on refining effects，and the alkalinity of reagent could directly affect the degree of the reaction between reagent and impurity，so reagent species has a close relationship with refining effects.Furthermore，promotion of raising temperature on refining effects of different reagents was quite distinct too，which was proved by the experiment.From this perspective，exploration was made to seek the approaches of making the refining effect better，decreasing cost，and improving alkali-acid method.
    Research on the Stripping of Guangxi Hepu Kaolin
    GUAN Jun-Fang, YU Yan-Qiang, WEI Ting-Ting, ZENG Wei-Neng, YANG Zeng-Liang
    2011, 40(03):  99-101. 
    Asbtract ( 2013 )  
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    Taking the overflow from the series classification of φ75 mm and φ50 mm hydrocyclone in a certain Kaolin Mine of Hepu in Guangxi as raw materials of stripping，investigation on effect of type and dosage of dispersant，stripping concentration and time on the Kaolin stripping were carried out by adopting the stirred mill.It was obtained that stripping product in -2 μm size reached the yield of 95% when stripping concentration was 65%，stripping time 140 min and dispersant polyacrylate sodium (DC) accounting for 2% of the raw materials by adding two times separately.
    Experimental Research on the Beneficiation of a High Calcium Fluorite Mine in Jinta County
    ZHOU Tao, SHI Wei-Hong
    2011, 40(03):  102-104. 
    Asbtract ( 1968 )  
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    The paper introduces the research experiments on selection of inhibitor，grinding fineness，dosage of oleic acid，and verification effect of new technology for a fluorite mine with high content of carbonate in Jinta county of Gansu.The results showed that fluorite concentrate with CaF2，CaCO3，SiO2 content of 98.02 %，0.70%，1.10% at CaF2 recovery of 82.03% was obtained by the process of one-roughing and six-cleaning，two-scavenging and one-cleaning with the acidic water glass and T-29 as combining inhibitor for calcite and quartz，and oleic acid as collector for fluorite，which realized an effective separation of fluorite，calcite and quartz.
    Development and Application of Calculation Procedures of  Leica SPRINTER Serial Digital Levels
    ZENG Zhen-Hua, CAO Wen-Bo
    2011, 40(03):  102-113. 
    Asbtract ( 2203 )  
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    Since the new digital level of Leica SPRINTER series have not been furnished with the calculation procedure，the related calculation procedure for this type of digital levels was developed by a series of practical exploration from the data transmission to greatly improve its efficiency and measuring precision from the optical to the figure and from the manual to the automatic.
    Ground Subsidence Monitoring with D-InSAR in Qianyingzi Coal Mine
    YAN Jian-Wei, WANG Yun-Jia, CHEN Guo-Liang, ZHU Yong, CHEN Yu-Ping, YIN Zhao-Yuan
    2011, 40(03):  105-107+111. 
    Asbtract ( 1991 )  
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    Taking Qianyingzi coal mine of Anhui Hengyuan Coal-Electricity Group (North of Anhui) as the experimental district，the surface subsidence information in this area during Jan 13 to Feb 28 in 2010 was obtained by two scenes ALOS PALSAR image of L band and by way of “two pass” D-InSAR，which were compared with subsidence and deformation data from the ground monitoring station at the same period.The results show that it is correspond with the leveling measurement at ground monitoring station，and  this technique can perfectly fulfill the monitoring task of ground subsidence in coal mine of plains.
    Geochemical Characteristics of Kaihua Tongcun Granitic Porphyry In Western Zhejiang and Ore-prospecting Potential
    CHEN Shuai-Qi, YU Xin-Qi, ZHANG De-Hui, DAI Yan-Pei, LI Hong-Ke, QIU Jun-Ting
    2011, 40(03):  108-111. 
    Asbtract ( 2240 )  
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    Through the field sampling and geochemical studies on Tongcun rock mass of Kaihua in Western Zhejiang，it is determined that Tongcun rock mass belongs to the granite porphyry of aluminous high-K calc-alkali series.Through the stable REE and trace elements，the types of rock mass and other features are determined.REE's distribution patterns are consistent with that of the same granite porphyry (I-type).The distribution of trace elements has a characteristics of large ion lithophile element enrichment，showing significant Ta，Nb，P，Ti negative anomalies，which are similar to the rocks under the environment of “island arc”.Compared with the bedrocks of porphyry deposit，it has not a good ore-prospecting potential.
    The Geological Characteristics of the Keyouqianqi Silver-copper Polymetallic Ore of Inner Mongolia
    CHENG Tian-She, YANG Wen-Jing
    2011, 40(03):  114-116+128. 
    Asbtract ( 1792 )  
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    Through carrying out prospecting work in Keyouqianqi Shengli town of Xing'anmeng,the surface is delineated as numerous Ag and Cu-based ore-bodies. All ore-bodies are produced in secondary north-west faults fracture zone of granodiorite, which are closely related with granite porphyry. Various geochemical data statistics of rocks in drillings show that Ag, Cu and other elements are enriched in granodiorite rather than other rocks, and mostly enriched in the fracture zone. It is thus concluded that the deposit belongs to the silver-copper polymetallic deposit with hydrothermal alteration type in the fracture zone.
    Establishment of the Virtual Reality System of Mining in  Zhangmatun Iron Mine and Application
    ZHANG Peng-Hai, YANG Tian-Hong, LIU Hong-Lei, CHEN Shi-Kuo, TANG Chun-An, ZHANG Sheng-Jun
    2011, 40(03):  117-121. 
    Asbtract ( 2189 )  
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    In combination with the actual situation of Zhangmatun iron ore, and based on the virtual reality system software of Northeastern University, a three-dimensional scene was developed, including ground stratum, water-prevention curtain, orebodies, tunnels and stopes etc, which is a set of virtual mine system containing virtual roaming, database query and interactive control function.On this basis, in view of shortcomings of the domestic virtual mine technology, the virtual reality software was secondly developed to enhance the ability of integrating the external data, and realize the collection of the data information of visual microseismic monitoring, the stress and damage field of finite element calculation.Then, the joint interpretation and analysis of these three-dimensional data were made to evaluate the stability of surrounding rocks and position the hazardous area.This technology broadens the application field of virtual reality and improves its usefulness.
    Real-time Microseismic Monitoring System Based on Virtual Instruments
    ZHANG Rui-Hong, LIN Da-Chao, SU Sheng, WU Jian-Xing, QIAO Lan
    2011, 40(03):  122-125. 
    Asbtract ( 2115 )  
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    Many geologic hazards, such as rock burst, extrusive coal and gas, have an inevitable connection with microseismic in rock mass.Inspection on underground microseismic signal is a good way to determine the range and level of underground rock breaking to provide a powerful evidence for underground safety monitoring.Previous microseismic systems based on DSP or single chip can't reach the desired data collection due to its limitation, neither realize the advanced algorithm.The real-time microseismic monitoring system realizes the acquisition of multiple microseismic signals and the wavelet transform algorithm, which gives full scope to the advantages of virtual instruments.The monitoring result is much similar to actual rock burst and the error of location was minor to the defined upper limit, which means that the new system effectively completes the real-time monitoring and analysis on microseismic.
    Application of the Pulsed Magnetic Field in the Cyclone-static Microbubble Flotation Column
    LI Chao, CAO Yi-Jun, YANG Xing-Man, NIU Guo-Peng, LIU Yong-Hua
    2011, 40(03):  126-128. 
    Asbtract ( 2326 )  
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    In order to reduce the flotation tailings grade of a dressing plant of magnetite, experimental researches on the new magnetic flotation with silicon removal were carried out. The results showed that comparing with the conventional inverse flotation process of one-roughing and two-scavenging with cyclone-static microbubble flotation column, the process of one-roughing and one-scavenging after the flotation column was added with an additional pulsed magnetic field shortened the flotation time of 30%, reduced the tailings grade by 6.35 percent, and increased the recovery by 0.95 percent under the similar circumstances of raw ore’s nature and concentrate grade before the flotation. The application of magnetic flotation method in reverse flotation of magnetite opens up a new approach for the separation of magnetite in China. 
    Research and Development of Fuzzy Intelligent Control System for Grinding and Classification
    LIU Xiao-Bo, HUANG Song-Wei
    2011, 40(03):  129-131. 
    Asbtract ( 1726 )  
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    The paper presents a technical scheme combing with the fuzzy control and PID control and emphasizes the basic principles of fuzzy control, the PID control algorithm and its application on grinding and classification. Based on the production practice, the original complex model is optimized, realizing an effective control on grinding. This scheme can effectively avoid the occurrence of over-load and under-load of the mill, maintain all work index of the mill, and ensure the control system to be reasonable and economical. The implementation of this project opens up a new way for realizing an effective control in grinding and classification.
    Analysis on the Underground Heat Source and Heat of Deep High Temperature Deposits
    CHEN Yi-Hua, SUN Hao
    2011, 40(03):  132-135. 
    Asbtract ( 1755 )  
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    The calculation method of heat source and heat generation in high-temperature mine is analyzed.Taking Dongguashan for example，the underground heat source (wallrock heat release，electrical and mechanical equipment heat release，thermal discharge of oxide ore，hot water heat release，human body heat release，etc.) and thermal analysis are calculated out.It is clear that this method is feasible.
    Study on Comprehensive Treatment of Geological  Environment of Xinlong Rare-Earth Mine in Anyuan County
    ZENG Min, PENG Hong-Xia, LIU Feng-Mei
    2011, 40(03):  136-139. 
    Asbtract ( 1834 )  
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    Taking geological environment of Xinlong rare-earth mine in Jiangxi Anyuan county as a research area, the current situation and genesis of the mine geological environment in the area are analyzed, and the comprehensive treatment process of mine geological environment via construction and biological controls are introduced. Finally, it summarizes the experience of the integrated control technology of environment in this rare-earth mine, which provides a positive support in the ecological reclamation of mine ecological environment.
    Back Analysis of Rock Mechanical Parameters of Open-pit Mine Slope and Stability Analysis
    NIU Lian-Chao, GAO Yong-Tao, GAO Bin
    2011, 40(03):  140-143+153. 
    Asbtract ( 2156 )  
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    In slope stability analysis，the selection of rock mechanical parameters has direct influence on the result of the calculation.In order to improve the accuracy of numerical simulation results，using the landslide measured data，such as the radius of sliding surface，sliding surface center coordinates and safety factor，and combining with orthotropic test，BP neural network and limit equilibrium theory，the back analysis of shear strength parameters of fault，dolomite and mica rock are carried out.Comparing monitoring data of landslide with the calculation results，the range and location of landslide is close to the monitoring data of landslide，which indicates that the method of this back analysis is feasible and accurate.Finally the inversion results are adopted to make numerical simulation analysis of deep mining for open-pit mine and make the evaluation of the stability.
    Potential Support Function of Validating New Type of Lamella Polymer in Metal Mine
    WANG Yi-Cheng, DONG Shan, CHEN Guo-Tao, ZHU Ze-Hui
    2011, 40(03):  144-146. 
    Asbtract ( 2331 )  
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    As to the underground mining in metal mines, the lamella layer of polymer is a new type of area support, which is advanced, convenient, quick-acting and efficient. The support materials can provide huge consolidation strength for rocks in the process of control before and after yielding fracture, which has potential support in minerals and rocks. Through the experiments of uniaxial compression strength with and without spraying coating layer and the consolidation recovery effect test of wall-rocks with lamella layer, the potential support property of the polymer layer is inspected and demonstrated, and it provides a scientific argument for the new approach to resolve the problems in support of soft rocks tunnel.
    Degradation of Hydroximio Acid Collector from Wastweater  with TiO2 Novel Photocatalytic Material
    LEI Shao-Min, LI Pei-Yue, MEI Guang-Jun, LI Jia, LI Jian
    2011, 40(03):  147-150+164. 
    Asbtract ( 1892 )  
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    A novel photocatalytic material was prepared by compounding nanocrystal film of titanium on surface of the substrate which are light multiporous and recyclable and floated in aqueous phase.Taking wastewater from beneficiation of hydroxamic acid floatation collector with difficult degradation as research subject,the effect factors of the compounding times of crystal film,original concentration of wastewater and pH values on photocatalytic activity of the material were investigated.The results showed that a novel photocatalytic material with good photocatalytic performance was prepared by compounding crystal film for 5 times and roasting at 700 ℃ for 2 hours.Through photodegrading to the N-hydroxy phthalimide collector with concentration of 33 mg/L for 3 hours,the decolorization ratio reached 95.44%.This photocatalytic material still keeps favorable photocatalytic activity when recycled.
    Experimental Research on Wastewater Treatment of Beneficiation with Bi2O3 Catalytic Oxidation
    LIU Hong, MEI Guang-Jun, ZHOU Guo-Hua
    2011, 40(03):  151-153. 
    Asbtract ( 1771 )  
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    The degradation effect of treating the simulating beneficiation wastewater containing xanthate with Bi2O3 catalytic oxidation was investigated to check out the effect of light or not, the reaction time, pH value in wastewater, the dosage of Bi2O3, the concentration of xanthate, the reusability of catalyst on the catalytic oxidation.The results showed that with the initial xanthate concentration of 30 mg/L, the natural pH=7.2, Bi2O3 dosage of 1g/L, no light and stirring for 60min, the degradation rate of xanthate reached 99.74%.If reused for four times, the catalyst still has a good activity.Moreover, in the degradation process of xanthate, no intermediate product was produced.So it has a high practical value.
    Experimental Study on the Iron Recovery from Red Mud with  Hydrophobic Agglomerating-Magnetic Seed Method
    HAN Zhao-Yuan, GAO Yu-De, WANG Guo-Sheng, XU Xiao-Ping, ZOU Ni
    2011, 40(03):  154-156. 
    Asbtract ( 2058 )  
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    In view of red mud with high content of iron, mud, micro-fine particles,taking the method of recovering hematite recovery with the hydrophobic aggregation-magnetic seed method and got the optimal parameters in the process, such as the magnetic flux density, pulping concentration, stirring time, the dosage of sodium silicate, the amount of magnetic seeds,the dosage of diesel oil and oleic acid.Then separating effects of the hydrophobic aggregation-magnetic seed method are compared with that of the conventional magnetic separation technology at each best condition.It is obtained that iron grade and recovery are increased by about 10% separately with the former method, comparing with the later.
    Experimental Research on Increase of Copper Recovery for an Iron Tailing
    WANG Shu-Hong, SUN Yong-Feng, DONG Feng-Zhi
    2011, 40(03):  157-159. 
    Asbtract ( 1876 )  
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    Due to low copper recovery in magnetic separation of tailings in a dressing plant of Shandong，the concentration test researches are made.The results showed that with the grinding fineness of -0.074 mm 70%，copper concentrate grading at 16.50% with a copper recovery of 83.88% was obtained by choosing isoamyl xanthate as a collector of chalcopyrite instead of ethyl xanthate，and adding the appropriate amount of water glass as dispersant of sludge.In the case of copper grade declining by 0.52%，the copper recovery increased by 38.21% with good separation index achieved.
    Beneficability Recovery test of Rutile from a Copper Tailings
    ZHOU Yuan, CUI Zhen-Hong, XIONG Li, LIU Long-Fei, SHEN Xin-Chun
    2011, 40(03):  160-161. 
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    The paper analyzes the properties of a copper tailing of Jiangxi, and describes the process and equipment of rutile recovery from tailings. The optimal operating parameters of centrifugal concentrator, the type of reagents and the optimum dosage in flotation of rough concentrate from gravity separation were determined through tests. In the closed-circuit flotation process of one-roughing, two-scavenging, four-cleaning and medium ores back to the feed, the final concentrate with TiO2 grade of 68.28% and total recovery of about 6.6% was obtained.
    Experimental Research on De-carbon in Flotation of Fly Ash in a Power Plant
    DI Xue, CAO Yi-Jun, ZHOU Qiang, LI Guo-Sheng
    2011, 40(03):  162-164. 
    Asbtract ( 2250 )  
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    Due to its high LOI, fly ash that are discharged from a power plant can not directly be used.In view of this status quo, the laboratory flotation machine is adopted to optimize the conditions of flotation experiment for the samples, and comparison of the de-carbon effect with the cyclone-static microbubble flotation column and the flotation machine is made.The results show that by one-roughing separation, fly ashes with the yield of about 60% and LOI of 2.4% of are obtained by the flotation machine, and the yield of about 70%, and LOI of about 2% by the flotation column; The content of rough ash concentrate is only 40% by the flotation column, which is lowered by about 20% than that by the flotation machine.
    Preparation of New Cementitious Material with Activated Coal Gangue
    WANG Hai-Xia, NI Wen, HUANG Yi, ZHENG Yong-Chao, ZHANG Jing-Wen
    2011, 40(03):  165-167. 
    Asbtract ( 2021 )  
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    Taking the desulfurized gypsum and the analytical reagent CaO as activator, Beijing Fangshan coal gangues are activated by three ways, and then the strength of cementitious materials with the activated coal gangue in different ways are detected and analyzed to study the effect of activator and mixed grinding on the thermal alteration and activation of test materials.The microscopic properties before and after the activation of coal gangue are characterized by the X-ray diffraction; the cementitious activity of cementitious materials with coal gangues are characterized by the mortar strength analysis and scanning electron microscopy (SEM).The results showed that the main activity of coal gangue sources from the clay minerals.And the kaolinite and chlorite in coal gangue are dehydrated and broken down at 700 ℃ calcined to generate the amorphous SiO2 and Al2O3 which occurs the solid state reaction with CaO.In wet mixing process, the reaction is finished, and then two hydraulic active substances C12A7 and C2S are generated, both of which own a high cementitious activity.