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Table of Content

    15 July 2010, Volume 39 Issue 7
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    Investigation on Moving & Deformation Principle of Stratum with Caving in Eastern zone of Jinshandian Iron Mine
    Chen-Qing-Yun, YANG Cong-Bing, WANG Shui-Ping, ZHANG Dian-Ji, ZHANG Guo-Lian
    2010, 39(7):  1-4,70. 
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    3-D numerical analysis model with high-level fidelity was built according to the geological and operational conditions of the eastern zone of Jinshandian Iron Mine on the basis of its spatial geometry and mechanical property. Rock mechanical parameters were deduced according to the monitored data of underground mining in this western mine zone and introduced into the mechanical parameters of rocks and structural plane for the numerical analysis model of the eastern zone. Eight patterns was simulated in total-caving-in and no-total-caving-in situations separately, to predict the changing trend of stratum moving angle with excavation depth, and the results provided the significant evidence for the land-purchasing and house relocation.
    Research on Mechanized Mining Technique with High Intensity of  Upward Drift Stoping Under Poor Rock-mass Condition
    Wang-Yi-Ming, WU Ai-Xiang, JIANG Huai-Chun, ZHANG Heng, HAN Bin
    2010, 39(7):  5-7. 
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    Due to the features of broken ore & rock,easily weathering and collapse with poor stability in Jinfeng Gold Mine, there are many problems such as blasting difficulties, poor tunnel molding, low mining efficiency in upward drift stoping and rockfill. Through integrating a series of technologies as large-diameter empty hole undercutting blasting, bottom hole protection, wet shotcrete + resin bolting support, the efficiency of tunneling was enhanced and the support effects were improved. With technology innovation, a new mechanized mining technique with high-intensity as strengthened digging, supporting, mining, backfilling had been achieved under poor rock mass condition. As a result, the tunneling efficiency reached 94.5%, and tunnel forming rate attained 100%, and mining intensity reached 42.5 t per work and shift. The integrated technologies have reached the international advanced level.
    Studies on Meso-crack Dynamic Evolution Properties of Marble
    TANG Hu-Dan, ZHU Zhen-De, ZHU Ming-Li
    2010, 39(7):  8-13,139. 
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    Through observing the strain response and the surface crack image of marble samples, researches on surface micro crack initiation of samples, the image expansion and the corresponding experimental quantitative were made. Based on the fundamental theories of micromechanics and thermodynamics, and with the help of fundamental method of homogeneous, the damage evolution properties of marble under uniaxial compression were mainly investigated. The elasticity assumptions were put forward, and rock host and crack was recognized as the composition of rocks, both of which conform to the principle of superposition. The cracks were divided into open crack and close crack and were analyzed form the perspective of micromechanics and thermodynamics. On the hypothesis that the crack was under tensioning force at initial time, shearing pressure become the main force to the rock damage when crack closed. The rule of crack evolution properties was determined, and the relationship between crack normal motion and tangential motion was represented with application of non-elasticity Mohr-Coulomb criterion under shearing pressure. Lastly the characteristics of the damage dynamic evolution were discussed further under uniaxial compression.
    Study on Sandstone's Compression Creep under Lateral Restriction
    WANG Yan-Ning, CHEN Yun-Tao, HUANG Yu-Long, HAN Li-Jun, ZHANG Qiang
    2010, 39(7):  14-18,30. 
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    In recent years, the long-term stability problem of tunnel and large underground cavern caused by rock creep has been widespread focused by scholars at home and abroad. And great progress on the experimental research of rock creep has been made. Through the simulation of the stress state of surrounding rock, the Sandstone's uniaxial compressing creep tests under un-lateral restriction and lateral restrain were made respectively, and their creep deformation rules were comparatively analyzed. The test results show that the stress threshold value and ultimate strain value of accelerative creep were increased, and the creep rate was reduced. Based on the experimental data, the viscoelastic deformation rules with the rock stress level and time variation was proposed, thus providing the experimental basis for the numerical simulation and theoretical calculation.      
    Exploration of Numerical Simulation on the Mining Subsidence of the Gangue Backfill Based on FLAC3D and SURFER
    LI Shuai, GUO Guang-Li, XU Dou-Dou, CHA Jian-Feng
    2010, 39(7):  19-22. 
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    FLAC3D & SURFER8 were applied to forecast the surface movement after gangue backfill mining. Comparing with the results of probability integration method，it is found out that the results of FLAC3D are so closer to the results of the probability integration method. However, the former is based on the physical and mechanical parameters calculated by actual drilling of coal and rock, which can avoid the problems in complex parameters determination with the probability integration method (such as the equivalent mining thickness, main influencing angle). It brings a simple and efficient way of gangue backfill mining subsidence forecast and engineering decision-making.
    Experimental Study on Low Dilution Ore Drawing in Jinshandian Iron Mine
    CHENG Ai-Ping, XU Meng-Guo, LIU Yan-Zhang, WANG Ping, CHEN Zhi-Yuan
    2010, 39(7):  23-25. 
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    To solve the problem of the ore dilution rate increasing after adopting  large spacing structural parameter in Jinshandian Iron Mine, an experimental study of low dilution ore drawing in the lab was made.Two different kinds of drawing methods of Low Dilution Ore Drawing and Current Cut-off Ore Drawing were carried out by Multicell Three-dimension Ore Drawing Model.Then, comparing with the results, it is found that this low dilution ore drawing method was completely feasible in Jinshandian Iron Mine and was recommended with the cut-off grade of 30%.
    Optimization of Implementation Plan of Joint Construction Project of Lilou Wuji Iron Mine
    WEI Jian-Xian
    2010, 39(7):  26-30. 
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    In view of its optimization potentiality in mining sequence, development project, mining methods, ventilation system, intermediate section transport level and transportation system, production subsidiary facilities and service facilities in original implementation plan of joint construction of Lilou-Wuji iron mine. The whole production system become perfect and more reasonable through analysis, research and optimization from above aspects based on the original implementation plan. By this way, the infrastructure construction is obviously shortened, meanwhile construction schedule speeded up, construction period shortened, and the investments and manufacturing costs reduced. The adequate production and service facilities provide a guarantee for the smooth production and business development.
    The Failure Likelihood of Key Block of Jointed Rock Slope
    ZHU Jie, LIU Da-Wei
    2010, 39(7):  31-33,40. 
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    The failure of slope is generally caused by the destabilization of key block which lead to the conducive chain reaction of failure. So the key block is the core factor affecting the stability of slope. The block failure probability, which was related to two parameters: the joint intersection probability and the JP instability parameter to evaluate the stability of the key block. And then, the connectivity rate of rock structural surface was adopted to revise the joint intersection probability. The revised joint intersection probability could reflect the size and discontinuity of structural planes. The result shows that the failure probability of the key block could be evaluated with the block failure likelihood which can provide the basis for the design of rock slope support.
    Application of Analytic Hierarchy Process to Selecting Mining Technology for Open-pit Mine
    DONG Shou-Yi
    2010, 39(7):  34-36. 
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    The choice of mining technology for open pit mine is an important part of open pit design, which will directly affect the economic benefits of mine. This paper studies key indicators in selecting mining process and establishes the analytic hierarchy process model for process selection. This method is correct and practical by verifying with examples. This research and conclusions provide good reference for similar mines in China.
    Finite Element Simulation Study on Stoping of Remnant Ores and  Stability for Complicated Mine Area
    WANG Qing-Lai, XU Zhen-Hua, ZHU Li-Ping, SHI Fei
    2010, 39(7):  37-40. 
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    Based on engineering practice in Xianglushan Tungsten Mine Jiangxi, the stoping of remnant ores and stability for complicated Mine area were analyzed by use of 3D-δ. the stress distribution and displacement trend were revealed, and the reliability of results by the empirical methods was verified and evaluated. The results were important to stoping of remnant ores safety and reinforcing measures reasonablely for pillar.
    Study on Beneficiation Process of Copper Sulphide Ore in Low Alkali Conditions
    AI Guang-Hua, Zhou-Yuan
    2010, 39(7):  41-43+66. 
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    According to the characteristics of copper sulphide ore, the mineral processing flow-sheet and new reagent system were investigated and adjusted. The experimental resuits indicatel that such technical indexes as copper grade of 21.37% and copper recovery of 91.78% can be obtained by the process of copper priority and coarse concentrates regrinding beneficiation process with combined depressors in low alkali conditions. This flow-sheet is simple and can achieve high copper concentrate grade and recovery ratio of copper. And it is easy to be industrialized as well, thus providing the basis for transformation programs for the overall expansion of concentrator.
    Experimental Study on Iron Improvement and Desulphurization of a  Vanadium-titanium Magnetite Concentrate
    XIE Mei-Fang, WEN Shu-Ming, ZHENG Hai-Lei, CHEN Yu
    2010, 39(7):  44-46,82. 
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    In view of the properties of vanadium-titanium magnetite concentrate from Panzhihua, some condition tests for iron improvement and desulphurization of reverse flotation were made. Based on this, the open-circuit flow-sheet tests were carried out. The tests results show that Fe concentrate grading at 57.17% with an 89.94% recovery was achieved through the low-intensity magnetic separation. Then S content in concentrate can be lowered to 0.26% by reverse flotation desulphurization flow-sheet, with high-grade magnetite concentrate finally achieved.
    Experimental Study on Desulphurization of a Magnetite Ore from Xinjiang
    WANG Feng-Shui, LIN Jun-Ling, ZHU Guo-Qing
    2010, 39(7):  47-50. 
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    The ore properties and the experimental research of flotation for a magnetite ore are described．The test results show that using a technological flow-sheet of flotation followed by magnetic separation with butyl xanthate as collector and CuSO4+Na2S as combined activator, the grade of the iron concentrate could be raised to over 65% and the sulfur content of the concentrate reduced to below 0.30%．And the comprehensive utilization of copper and sulfur was achieved.
    Experimental Research on Beneficiation Tests for A Fine Particle Ilmenite in Fine Particle Ilmenite in Wenshan, Yunnan Province
    WEI Lian-Jun, HUANG Qing-Qi, LIAO Jiang-南
    2010, 39(7):  51-54. 
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    The run-of-mine of ilmenite in Wenshan, Yunnan province contains the content of TiO2 5.96%. It mainly exist in the type of ilmenite and a little of rutile. The feeding particle-size is controlled to be about -0.5 mm through the grinding and classification system. The hydraulic classification size is 0.038 mm with the hydraulic classification gravity separation. Through the gravity flow-sheet of “roughing by spiral chute and cleaning by tabling”, the titanium concentrate grading at 46.66% with a 52.35% recovery was obtained. This flow-sheet owns features of simple processing, low investment, and low costs in beneficiation.
    A New Type of High Efficlent Collectoron Sulfide Ores ——Preparation  and Application of Acylonitrile Ester N,N-dimethy Dithiocarbamate
    LI Wen-Feng, CHEN Wen
    2010, 39(7):  55-56,86. 
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    Acylonitrile ester N,N-dimethy dithiocarbamate is a new type of high efficient collector on sulfide ores, which has very strong collecting and selecting ability on sulfide mineral in complex and extremely cold district. Orthogonal test is made to determine the best process conditions: the mixture ratio of Acrylonitrile, Carbon disulfide and Dimethylamine （mol）1∶1.1∶1.05, reaction temperature at 20 ±2℃, reaction time 6 h, the component 75%, the rate of product 80%. Metal copper recovery rate can be improved by 3.62% and copper rough concentrate grade increased by 0.93% with Sodium petylxanthate dosage of 30 g/t and Acylonitrile ester N,N-dimethy dithiocarbamate 80 g/t, comparing with Sodium petylxanthate dosage of 300 g/t.
    Research on Concentration of Large Flake Graphite with the Filling-type Flotation Machine
    XIE Chao-Xue, YUAN Hui-Zhen
    2010, 39(7):  57-60. 
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    Under the same conditions, the beneficiation tests of large flake graphite with filling-type flotation machine and the traditional one are contrasted. The former can improve the concentrate grade by 0.26 %, and recovery rate by 2.95 %. From observing the open-circuit tests, one or two cleaning concentration processes can be decreased in whole process with the filling flotation machine.
    Experimental Study on Beneficiation Process for a Certain Hematite in Anhui
    CHEN Jiang-An, LUO Xian-Ping, LIU Jun, RAO Yu-Huan, HUANG Hui-Chun, XIONG Da-He
    2010, 39(7):  61-62,176. 
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    A certain Anshan-type hematite in Anhui contains 40.19% Fe and 28.88% SiO2. After assaying its ore property, the experiment of one roughing and one cleaning process with this hematite was carried out with SLon pulsating high gradient high intensity magnetic separator. The results show that under the conditions of 0.9 T field strength in roughing and 0.5 T field strength in cleaning, iron concentrate grading at 58.05% with a  61.53%  recovery rate can be obtained. Then, the magnetizing roast experiments were carried out on tails, obtaining iron concentrate with Fe grade of  61.38%  and total recovery rate of 82.71%. All these results could be used as reference for beneficiation production in this area.
    Technical Improvement Practice on Quality Increase and Silicon Reduction of High-intensity
    LIU Ren-Gang, SHEN Li-Yi, LIU Yang
    2010, 39(7):  63-66. 
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    The second concentractor of Kunsteel Dahongshan iron mine adopted the gravity separation process of shaking table with vibrating spiral chute in replacement of the flotation craft. It separates the high-intensity magnetic separation concentrate with Fe grade of 49.43% and SiO2 content of 16.71%. The iron concentrate with Fe grade increases to 58.71%, SiO2 content decreases to 12.32%, Fe recovery reaches 85.21%. The purpose of reducing SiO2 content, improving the Fe concentrate grade and saving costs was accessed.
    Domestic Research Status on Flotation Separation of Cu-S
    LI Zong-Zhan, LIU Jia-Di, WANG Zhen-Yu, ZHU Ren-Feng
    2010, 39(7):  67-70. 
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    This paper describes the characteristics of Cu-S ores and the main programs on flotation separation of Cu-S. Combining with the application of the domestic industry, to the recent reagent research and process on flotation separation of Cu-S are clarified, and its research problems and directions are pointed out.
    Flotation Technology Research on a Polymetallic Silver Ore of Gansu
    LI Min-Cai, GUO Hai-Ning
    2010, 39(7):  71-74. 
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    Based on flotation research on a complex hard-processing oxide polymetallic silver ore in Gansu, the optimal flotation process is suitable for this ores. In process, gold and silver concentrate are optimally obtained with high effective mixed collector D-421 and high effective mixed frother Z-205, then lead concentrate is achieved by flotation with regulator Na2S, D-421 and Z-205. The recovery of Au and Ag can be greatly improved in the test. The production practice indicates that the technology conditions are reasonable with stable production indexes.
    Study on the Mineralogical Property and Mineral Processing of a Low Grade Iron Ore
    吕Xian-Jun, SUN Li-Jun, DU Fei-Fei
    2010, 39(7):  75-77. 
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    The mineralogical properties and the mineral processing of a low grade iron ore were studied. Results show that the ore is a low grade magnetite ore with a TFe content of 27.65％and a MFe of 87.96%. An iron concentrate with TFe grade of 67.07% and recovery of 86.05% was obtained by the process of stage grinding and stage magnetic separations under the first stage grinding size of -74 μm 57.82％ and the second stage grinding size of -74 μm 75.92％. And, the process consisting of one stage grinding, magnetic separation and reverse flotation produced an iron concentrate with the grade of 66.21% and recovery of 79.97% under the grinding size of -74 μm 67.56％.
    Study on Process Mineralogy of a Certain Oolitic Hematite in Hebei
    NIE Yi-Miao, NIU Fu-Sheng, LIU Li-Na, ZHANG Jin-Rui, ZHOU Shan-Shan-
    2010, 39(7):  78-82. 
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    Based on process mineralogy researches of the chemical composition, mineral constituent, ores texture and structure, particle distributions, ore dissemination characteristics and so on, a systematic investigation on the liberations of different grinding products and sieve analysis was made, which provided a good basis for determining reasonable beneficiation process and conditions.
    Determination of Lead in Iron Ores by Atomic Fluorescence Spectrometry
    FU Ran-Ran, LIU Shui-Qing, CHEN Ying-Na, KANG Ji-Tao
    2010, 39(7):  83-86. 
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    Iron ores were dissolved with mixed acid. The masking reagents were added in order to eliminate the disturbance of some elements, and sensitizing agent was used to increase the probability of alkyl lead generation. The content of Pb in it was determined by Atomic Fluorescence Spectrometry (AFS). The best acidity and the optimum working conditions were tested by experiments. The allowance of interference elements was also investigated. The results showed that the detection limit of the method was 0.94 μg/L, the relative precision was 4.5%, the linear area was 0~80 μg/L, and the recovery was up to 95.5% or more.
    Study on the Characteristics of Sectional Primary Overlap Halo in the North of Fenghuangshan Copper Deposit
    MAO Zheng-Li, WEI Liang, LAI Jian-Qing, PENG Sheng-Lin, SHU Zhi-Ming
    2010, 39(7):  87-90,102. 
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    The study results on sectional primary overlap halo indicated that in the north of Fenghuangshan copper deposit, the halo and ore-body are formed at multi-stage. Every stage of halo forming and orebody forming has its own distribution characteristics of primary halo. The overlap of primary halo basically does not change its characteristics, just forming a larger scale and weaker strength primary overlap halo. And then, the distribution characteristics of primary overlap halo in this area indicate the possibility of concealed ore-body existing in deep area.
    Relationship Model of Rock Mass Fracture and Deformation and Water Seepage of Underground Mine
    LIU Gui-Li, Zhang-Yong-Liang, CAI Si-Jing
    2010, 39(7):  91-93,112. 
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    In order to realize the integration of underground heat damage treatment and heat energy utilization, the feasibility of taking use of fluid seepage characteristics to utilize underground heat energy is explained, the proposal for using high-pressure pump artificial fracture, with cold water to wash underground hot rocks obtain heat energy is put forward, and the main reasons of natural groundwater bursting are found out. Through analyzing the causes and characteristics of rock mass fracture and deformation, the data indicated that it can be carried out under the state of equivalent continuous medium to establish the relationship model between rock mass fracture deformation and water seepage. Finally relationship model of rock mass fracture deformation and seepage was established to obtain the relationship of groundwater flow and rock mass fracture and deformation.
    Research on 3D Deposit Models Based on Spatial Little Triangulated Surfaces
    LUO Zheng-Shan, WANG Xiao-Wan, WEI Ya-Ting
    2010, 39(7):  94-97. 
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    One of the objectives pursued by the designers in departments of mine geology, mining and others has grown to how to build a CAD system of 3D Geological Survey with simple operation and powerful function to realize the auto-formation of 3D deposit models. In view of this, a variety of mathematical methods, database technology, graphics-video processed technology are comprehensively applied to deeply study the overall framework and implementation method with software of CAD System of 3D geological survey. Also the paper took an eventful attempt to research the focus and nodus, automatically drawing the boundaries of mineral rock and auto-formation of the 3D deposit models, in the CAD System of 3D geological survey. Then an auto-formation method of 3D deposit models based on the surface-fitting method of spatial little triangulated surfaces is proposed, which provides a totally new platform for mine geologists and miners.
    Prospective Evaluation of Suoluogou Au deposit Based on GIS
    GU Ji-Rong, FAN Xiao, WANG Yu-Qin
    2010, 39(7):  98-102. 
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    Under support of the geographic information system GIS, a prospective forecast and assessment model was established.In combination with the geological situation and geochemical characteristics of Suoluogou gold deposit, and using GIS technology, the spatial distribution structure of gold mining area was analyzed, delineating the gold prospecting target by different levels.By this way, the gold mine distribution laws were forecasted, thus providing a scientific basis for the next exploration program.
    Research On Wireless Sensor Network Node for Mine Environment Monitoring
    HE Xue-Wen, LI Bai-Ming, HUANG Guo-Ping, XIAO Yong
    2010, 39(7):  103-107. 
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    With the urgent requirement of metal mine environmental conservation and on-line monitor, a novel design scheme for on-line monitoring on the mine environment by wireless sensor network was proposed, and then the general architecture of the wireless sensor network was presented.The wireless sensor network node was designed based on low power AVR microcontroller ATmega128L and radio frequency chip for data receiving and transmitting CC2420 based on ZigBee technique.And the monitoring for environmental parameters was successful realized.The system has features of low cost, low power consumption, long life and good real-time.The practice showed that it has a great practical value and application prospect.
    On-line Safety Monitoring for Disk Braking System of Mine Hoisting Machine
    LIU Jun-E, AN Feng-Ping, GUO Zhang-Lin, ZHOU Xuan-Chi, LIU Bing-Wu
    2010, 39(7):  108-112. 
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    The function and structure of disk braking system of mine hoisting machine is introduced in the paper, as well as braking requirements, importance of hoisting machine in the system and research status at home and abroad.The influencing factors of disk braking system are analyzed with failure tree, and the research on safety monitoring system technique is made.Combining the failure tree analysis with practical situation, it is concluded that physical quantity being inspected in corresponding situation is obtained and on-line monitoring model is established with modern control method.The monitoring system is developed by industrial control software to achieve on-line data monitoring display, monitoring and alarm of given physical quantity, storage & fetch of important parameter, and search of operating trouble record so as to realize the online monitoring safety of braking system.
    Research on Belt Conveyor Shifting Mode in Surface Mine
    WANG Bo-Wen, CAI Qing-Xiang, CHEN Yan-Long, ZHOU You, QIN Tao
    2010, 39(7):  113-115. 
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    In our country，the semi-continuous mining system is an important technical developing direction of the stripping and mining links in large-scale surface mine, and belt-conveyor shifting is the key problem in this system. Three shifting schemes of conveyors in Yimin Open Mine are compared synthetically, and it is concluded that the optimum scheme is as following: two shifters are laid out like fan one after one, and they work in the same direction. Study relnits can ake guidence for smilar problem in other surface mine.
    americal Simulation and Optimization for Moving Jaw of BP1100/700 Jaw Crusher
    XU Hong-Yu, XU Zhan-Min, AI 尔Ken-·Ai-Hai-Ti, WANG Guo-Bo
    2010, 39(7):  116-118,128. 
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    The mamerical simulation on moving Jaw of BP-1100/700 jaw crusher was accomplished by the finite element analysis software ANSYS. The calculation reswts show that the original structure is unreasonable in design, which is the key reason for failure of moving Jaw in application. Through adjusting the structure of moving Jaw, its mechanical property  improved, which  make the distribution of stresses more reasonable in maximum loading, and remarkably decrease the maximum stress. Meanwhile, the free vibration of the original structure and redesigned structure were analyzed. The modal analysis showed that their principal mode of vibration has no obvious change, and after redesigned, the stiffness of structure is harder. This research solves a practical problem and also provides a reference for moving Jaw design of jaw crusher.
    Automatic Control Reformation of Single Cylinder Hydraulic Crusher based on PLC
    YANG Li-Rong, CAI Gai-Pin
    2010, 39(7):  119-120,131. 
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    In view of the current low automatic efficiency, low productivity, and high energy waste of Single Cylinder Hydraulic Crushers with widely application, a specific proposal for the automatic control reformation of single cylinder hydraulic crusher is presented. Its implementation can realize the automatic control adjustment of the ore discharge and the constant power control of the main motor. This method can improve the productivity and automatic level of the device.
    Application of High-voltage Inverter on the Slurry Pump of Semi-autogenous Mill
    Huang-Ai-Guo, Su-Mei
    2010, 39(7):  121-124. 
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    Beneficiation process requires that the speed of slurry pump be continuously regulated, so that slurry of various pipes in the closed-loop controlled process system can maintain dynamic balance, no overflow, no discontinuous flow, no choke and burst pipe. Otherwise, it will result in the parking of beneficiation equipment and a large number of loss and waste of copper, sulfur, iron concentrates and significant economic losses. This paper describes the composition and principle of high-voltage inverter, and the application effects of high-voltage inverter on the slurry pump of semi-autogenous mill in the Concentrator of Fongguashan Copper Mine. It also presents the harmonics effects of high-voltage inverter on the high-pressure asynchronous motor and the solutions.
    Settling and Sliding of Solid Particles on Bottom Plate in Tilting Slender Up-flowing
    HAN Xiao-Yi, XU Jin-Kang, CHEN Jia-Dong, WANG Wen-Qian
    2010, 39(7):  125-128. 
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    Based on observing and on-site surveying of clarifier-thickener cones with “tilting slender up-flowing (TSU)” over years, main laws of settling and sliding of solid particles on bottom plate in TSU are found out after long time R & D. In TSU's settling zone, large or heavy particles settle down at first, and smallest or lightest ones settle in top zone of the tilting plate surface. The pre-condition of settlement continuously sliding down on this surface with inclination at α is sliding component of its gravity forces greater than surface resistance. The surface resistance value is minimized by means of optimized plate material, design and manufacture, and its self-sliding occurs and persists when its cumulate thickness, mass and gravity force achieved a certain value. The essential reason for the silted channel between plates lies in overloaded sediment in the cones. 
    The Moisture On-line Determination Methods for Iron Ores with the Robot
    JU Su, YUAN Xiao-Ying, HU Shou-Peng, DING Wen-Quan
    2010, 39(7):  129-131. 
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    Rizhao Entry-Exit Inspection and Quarantine Bureau successfully applied the robot into on-line moisture measurement of iron ore and sample preparation for the first time, and resolved many technical difficulties. This paper describes how to use the robot to realize on-line moisture determination for iron ores. The practical application shows that the function of robot in iron ore samples checking field can be expanded.
    Application of Fuzzy Relational Equation to the Prediction of Surface Maximum Vertical Subsidence in Mining Subsidence
    LIAN Zeng-Zeng, TAN Zhi-Xiang, LI Pei-Xian, DING Pei, TUO Wan-Bing
    2010, 39(7):  132-135. 
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    In order to accurately predict the surface maximum vertical subsidence in mining, the fuzzy relational equation between mine subsidence factors and impacts is established with the fuzzy mathematical theory and methods. And the fuzzy matrix conversion method is adopted to find the relationship among the factors and get the maximum vertical subsidence based on the indicators of all relevant factors of the coal face. The measured data of the mining area are used to verify the model with the expected results of the maximum relative error 9%, which can meet the requirements of mining subsidence. Research results indicate that the fuzzy relational equation method can accurately predict the surface maximum vertical subsidence value, thus providing a new approach for mining subsidence prediction.
    Application of FLAC3D & RG Underground Video System in Complicated Disposing Goaf
    DI Hui-Chao, REN Feng-Yu, CAO Jian-Li
    2010, 39(7):  136-139. 
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    Combining with the complex situation of Paishanlou gold mine, 3D numerical model by FLAC3D  was built to make the model surface fitting with the reality of mine by FISH language programming. This model fully reflects the real situation of surface and underground mined-out area. Then, the stability of surrounding rock mass are analyzed according to the displacement and stress simulation results of wall-rock in mined-out area. Although the model shows that the stress developed with an arch direction, which is toward the high compressive strength of rock material, the stability is temporary because of the low safety factor, stress concentration in pillar, time effect of rock mass, and mining disturbance. So the exposed area of goaf should not be expanded, and roof should be monitored immediately in mining process by RG underground video system, which can provide an objective basis for production.
    Application of Acoustic Emission Rate and Energy Rate in Rock Failure
    FAN Jun-Wei, TANG Li-Zhong
    2010, 39(7):  140-142. 
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    The acoustic emission rate and the energy rate are the key parameters of reflecting the rock failure. However, at present many scholars prefer acoustic emission rate to energy rate for predicting the rock failure. The research adopts the acoustic emission parameters at uniaxial compression of a kind of limestone rocks to firstly describe the catastrophe phenomenon of acoustic emission rate and energy rate, and research on the relationship of between acoustic emission rate and energy rate. It is found that the acoustic emission rate fully accord with that of energy. Then, the catastrophe theory is applied to establish the catastrophic forecasting model of rock failure for the above acoustic emission rate and energy rate. So a comparative study of the catastrophe model of acoustic emission parameters analysis is introduced in this paper. It was concluded that the catastrophe model of acoustic emission rate and energy rate can well predict the rock failure.
    Application of Landslide Surge Prediction in Conversion of Mining Pit into Tailings Reservoir
    DAI Yong-Xin, ZHAO Meng-Sheng
    2010, 39(7):  143-145. 
    Asbtract ( 1965 )  
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    Landslide surge brings enormous hazards on the facilities of tailing reservoir. The surge prediction principle was used to transfer the mining pit into tailing reservoir. Due to slope failure in local place, the landslide rapidly fell into the tailings. And the surge height was calculated, and the hazard on facilities in tailing reservoir (pontoon) was analyzed. Through predicting the hazard of landslide surge, it can guide the design and security positioning of pontoon to ensure its safe running.
    Discussion on Acceptance Check of Safety Evaluation for Non-coal Mine
    LI Xiao-Fei
    2010, 39(7):  146-149. 
    Asbtract ( 1785 )  
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    The acceptance check of safety evaluation for non-coal mine is one of the main basis for safety inspection and approval of non-coal mine construction project. Combined with the case, a systematic analysis on some issues in the safety evaluation of non-coal mine are made. And some recommendations for improving the quality are proposed from the evaluation agencies, the construction unit, and the government departments. It can further enhance the technical level and quality of safety evaluation.
    Application of Mine Safety Warning System Based on Web Technology
    GONG Jian, 欧Yang-Zhi-Hua
    2010, 39(7):  150-152,179. 
    Asbtract ( 1751 )  
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    In order to reduce the occurrence of mine accidents and achieve safe production, a mine safety warning system, which uses Python as the development language with Web technology and database technology, is established by studying the cause of the accident. The system adopts combination of B/S and C/S structure, establishing the personnel security module, the equipment module and the state of rock mass quality classification module. It can furnish real-time warning to the security of personnel and equipment, and determine the stability of rock mass. While using electronic forms and report automatically generated capabilities, the information management is realized. The practical application of the system shows that it can provide strong technical support for dealing with potential safety problems and improving the security of enterprise productivity.
    Research Progress on Clay-mineral as Environmental Remediation Material
    YANG Xiu-Min, LI Li-Xin, ZHANG Ying-Chun
    2010, 39(7):  153-156. 
    Asbtract ( 1724 )  
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    The clay minerals, as a kind of fine environmental remediation materials, attracts researchers' attentions.Because they have many excellent characteristics, such as high specific surface area, strong adsorption capacity and better cation exchange ability. Application of the clay minerals in wastewater treatment, air purification, remediation of contaminated soils, noise prevention and solid wastes treatment were introduced. The development trend of clay minerals in environmental remediation region was also presented.
    Study on Photo-catalytic Degradation of Flotation Collector of Salicylic Hydroxamic Acid
    MEI Guang-Jun, LI Pei-Yue, LEI Shao-Min
    2010, 39(7):  157-160,187. 
    Asbtract ( 1921 )  
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    A novel photocatalytic material which is light porous floatable in aquatic phase and can be recycled was prepared that composited nano-crystal film of titanium onto surface the substrate. These factors that affecting the photocatalysis have been researched in detail such as roasting temperature, coating times, initial concentration of wastewater, and pH as well with hydroxamic acid as a floatation collector. The results show that excellent photocatalytic properties of novel photocatalytic materials can be obtained when TiO2 coated five times, roasted at 700℃ for 2 hours. The degradation Rate can reach up to 83.47% as concentration of salicylic hydroxamic acid is 30mg/L and photo-degradation for 3 hours. A good photocatalytic activity is still kept as recycled 10 times.
    Experimental Research on Modified Coal Gangue as Adsorbent for Wastewater Treatment
    WANG Xian-Li, NIU Yun-Feng, WU Jun-Feng
    2010, 39(7):  161-162+172. 
    Asbtract ( 1637 )  
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    The modified coal gangue was used to treat the wastewater from distillation section of monosodium glutamate. The results show that as the raw water pH=1.8, COD 770 mg/L, NH3-N 217 mg/L, turbidity 29 NTU, 120 mesh  modified coal gangue at 1g was added into 50 mL wastewater. After vibrating adsorption for 120 min, the water with COD of 232.46 mg/L, ammonia nitrogen of 78.84 mg/L and turbidity of 8.5 NTU was yielded. The removal efficiency of COD, ammonia nitrogen, turbidity could reach 69.81%, 63.67% and 70.73%,respectively. The study provided a theoretical basis for the modified coal gangue as the adsorbent in treatment of wastewater from monosodium glutamate production and other high-concentration ammonia nitrogen wastewater. It also provide a means of wastewater treatment in production of monosodium glutamate.
    Research Progress in the Deep processing and Application of Anhydrite
    ZHAO Wu, HUO Cheng-Li, LIU Ming-Zhu, YANG Hua-Ming
    2010, 39(7):  163-168. 
    Asbtract ( 1996 )  
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    In this paper, the characteristics and the distribution of anhydrite resources in our country were introduced. At the same time, the activity of excitation and chemical modification techniques about anhydrite were also discussed. Some new technical characteristics on preparing sulfuric acid, new cementing materials and reinforcing polymer by using anhydrite were analyzed. The application prospect of anhydrite in cement, plastering gypsum and self-leveling materials was summarized. In combination with the features and application requirements of anhydrite, the specific direction in deep-level development of anhydrite was pointed out.
    Study on Integrated Utilization of Copper Resource
    LI Li-Qing, YANG Li-Qin
    2010, 39(7):  169-172. 
    Asbtract ( 1907 )  
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    This paper introduced the current situation of copper resources at home and abroad, and carried out the survey of copper production and copper consumption in recent years. Because of the conflict between domestic copper supply-demand and domestic low-grade copper resources, it propored a way that the investments on the reclaimed copper and the copper hydrometallurgy method should be increased, especially on research of synthesis of copper extraction. Then the formation of the independent copper extraction industry chain can realize a healthy and stable development of the domestic copper enterprises.
    Effect of Concrete Admixture of Steel Slag and Blast Furnace Slag on Cement Performances
    ZHANG Zuo-Shun, XU Li-Hua, SAI Yin-Ba-Te-尔, LIAO Hong-Qiang, SUN Peng-Hui, HAO Hong-Shun
    2010, 39(7):  173-176. 
    Asbtract ( 1760 )  
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    This paper investigated the influence of the addition of steel slag on performance of cement paste and the effect of single steel slag and the concrete admixture of steel slag with blast furnace slag on the strength of cement mortar. The results show that mobility of cement paste was improved after adding steel slag and setting time extends with the addition of steel slag increasing. With steel slag only, strength of cement mortar significantly decreased; When steel slag mixes with blast furnace slag, the strength varied little, since they can promote priming and hydration action with each other. Moreover, strength of cement mortar at 28 d exceeded to that of reference sample when steel slag was added at the mixture ratio of 20% in composite powder and substitutes 50％of cement in total quality.