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    15 January 2010, Volume 39 Issue 1
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    Research on High Efficient Energy Saving and Discharge  Reducing Technology in Anshan Iron Mine and its Application
    Meng-Guang-Dong, XUE Min, LI Wei-Bing
    2010, 39(1):  1-5，27. 
    Asbtract ( 1986 )  
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    The application of high efficient energy saving and discharge reducing technology is introduced from the more crushing less grinding technique, stage grinding technique, single magnetic separation, coarse and fine separation. The equipment application of high efficient energy saving and discharge reducing are described from the large-scale ball mill, new type wearable materials, Slon high intensity magnetic separator, MVS high frequency vibrating screen. And the industrial tests of RA-315, RA-515,MZ-21, RA-715, LKY anion reverse floatation collectors and small type tests of LKD anion reverse floatation are discussed. Besides, the situation of water saving, air pollution controlling, mine biology system resuming, comprehensive utilization of tailings are introduced. 
    Current Situation and Thinking of Mineral Processing Technique on Limonite Ore
    XIE Xing-Zhong, WANG Yu-Hua
    2010, 39(1):  6-10. 
    Asbtract ( 2128 )  
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    With the rapid development of China's iron and steel industry，iron ore resources with the properties of high-grade and readily separated are on the verge of depletion. How to rationally exploit and utilize complex and refractory iron ore resource is of great importance to release the contradiction between the supply and demand of iron ore and promote the development of China's iron and steel industry. Beneficiation techniques on limonite developed in recent years mainly include single process of gravity or magnetic separation etc. and combined processes with selective flocculation flotation etc. The results show that any effective beneficiation technique is not mature to be formed yet. Hence，a systematic classification for limonite ore resources is taken according to its characteristics，and then an effective beneficiation technique for the specific limonite ore resource was developed. This may be an effective way to resolve the problems of beneficiation technique on limonite gradually. 
    Research Progress on Bioleaching Technology of Low-Grade Copper Ore
    DONG Ying-Bo, LIN Hai
    2010, 39(1):  11-15. 
    Asbtract ( 1690 )  
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    This paper outlines the development status of microbial leaching technology，describes the status of bioleaching of low-grade copper ore in detail，including cultivation of excellent strains，improved leaching process and improvement of bio-reactor. The development prospects of bioleaching technology of low-grade copper ore，especially for low-grade copper tailing，are forecasted.
    A Projection Pursuit Evaluation Method of Blastability Classification Based on Simulated Annealing Algorithm in Underground Rock
    FANG Chong, ZHANG Xin-Gui, SUN Ping, DAI Zhi-Hong
    2010, 39(1):  16-19+158. 
    Asbtract ( 1967 )  
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    Based on the analysis of influencing factors for rock blastability，the consistent coefficient，acoustic impedance，explosive consumption，and mean fracture distanced of wall-rock are chosen as the criterion index for rock blastability classificationA projection pursuit evaluation model for rock blastability was established and its project direction was optimized by the Simulated Annealing AlgorithmThen the rock blastability can be evaluated and classified according to the index of projectionThe model was applied to the classification of underground rockThe evaluation results showed that this model can avoid the impact of subjective factors on the classificationThe results are accurate and true，thus providing a new proposal to comprehensively evaluate the rock blastability
    Research on the Technological and Economic Evaluation Model of  Developing the Overseas Mineral Resources
    WU Di, CAI Si-Jing, DONG Xian-Wei
    2010, 39(1):  20-23+34. 
    Asbtract ( 1703 )  
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    With the fast development of economy in our country，the consumption of mineral resources increases greatly，so it is very significant to develop overseas mines and utilize the mineral resourcesThe investment for developing overseas mineral resources entails high risk，thus it is necessary to have the technological and economic evaluation before the investmentIn this paper，by setting up an evaluation index system and using the expert consultancy method to determine the weight of the indexes，a linear weighted evaluation model is proposed，and then it is used to make the technological and economic evaluation for an overseas mineAfter making several practical programs according to this mine，the best option is chosen through analyzing the evaluation results of the modelThis model can be widely used in the technological and economic evaluation for developing mineral resources.
    Stability Analysis and Comprehensive Appraisal of High and Steep Slopes
    XU Guo-Qiang, ZHANG Ya-Bin, LIU Bing, ZHOU Chun-Lei
    2010, 39(1):  24-27. 
    Asbtract ( 1823 )  
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    Based on the analysis of geological condition for landslides in the Xunwu section of No206 national road，the characteristics about landslide distribution and the stability of the slope，the model of stability calculation is established to analyze the stability of slope by the limit equilibrium slice methodThe safety factors at the different working condition for landslides can be determined by the transfer coefficient methodThe study provides the important basis for the effective prevention and treatment of landslides，and also provides a valuable reference for the follow-up study on the slopes
    Study on the Impact of Blasting Vibration on Tunnel Stability
    LIU Wei, SONG Wei-Dong, ZHAO Bing-Qi, CHEN Yong
    2010, 39(1):  28-30+50. 
    Asbtract ( 1708 )  
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    In order to study the influence of blasting vibration on tunnel stability，a blasting model is established by the finite element methodThe effect of the dynamic force，reaction time and span on the stress field of tunnel wall-rocks and the surface displacement is analyzed by ANSYS softwareThe result shows that the displacement of tunnel is larger as the weight of explosive becomes larger，the reaction time is longer，and the distance is nearer to the tunnelUnder the blasting vibration，the side wall of tunnel can easily lead to collapse because of the concentrated stressThe influence of blasting on Y-direction is much larger than that on X-direction
    Research on the Strength and Stability on Fill Body of High-bench Stope
    ZENG Zhao-Kai, ZHANG Yi-Ping, WANG Yong-Ming
    2010, 39(1):  31-34. 
    Asbtract ( 1785 )  
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    Based on the mechanical analysis of the cemented fill body in the mined-out are，and by the analogy of experience and mechanical model of mathematical calculation，the strength requirement of cemented fill body for the underground mined-out area were put forward，providing the strength warranty for mix proportion design of mine fill bodyMeanwhile，the effect of explored wide and height on strength of cemented fill body was analyzed，and the variety characteristics of mechanics strength of stability cemented fill body were revealed This conclusion above has been proved to be reasonable in combination with the industrial experiment result in a copper mine in Anhui Province
    Study and Application of Intelligent Design of the Shotcrete and Bolt Support in Metal Mines' Tunnel
    ZHAO Yang-Dun
    2010, 39(1):  35-38. 
    Asbtract ( 2050 )  
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    The shotcrete and bolt support in parameter is based on the stability level of surrounding rock. The neural network was adopted to identify the stability of surrounding rock in underground tunnel. And the MBP (modified Back Propagation) model is built for identifying the stability of surrounding rock. In combination with the indirect engineering approximation and integral reinforce theory with the artificial intelligent technology as expert system，the intelligent system for designing of shotcrete and bolt support engineering has been developed and also certified to be correct by a project case. 
    Experimental Study on Model of Water-couple Blasting
    YANG Hai-Tao, LIU Wei-Zhou
    2010, 39(1):  39-40+58. 
    Asbtract ( 1544 )  
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    Using the cement mortar as test models，the air-couple charge and water-couple charge blasting tests are carried out to analyze the character of rock granularity after blasting under different conditions. The test results showed that water-couple charge was more even in rock granularity and lower in big blocks than that of air-couple charge with the same dosage. That means water-couple charge owns a stronger blasting strength with a higher energy usage.   
    Study on Resource Evaluation of Large-Scale Open-pit Mine and  Mining Limit Optimization: Take the Tibet Qulong Copper Mine as a Case
    WAN Chang-Lin, LIU Liang-Ming, GAO Xiang, LI Liang-Jun
    2010, 39(1):  41-44. 
    Asbtract ( 2325 )  
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    Taking the Tibet Qulong Copper Mine for example，the application of geo-statistics method in the resource evaluation of large-scale open-pit mine is demonstrated，and the copper-molybdenum was selected as the regionalized variable to conduct variogram calculation and structural analysis and to establish deposit mathematical model for grade estimation and resource evaluation by analyzing the statistical distribution characteristics of copper-molybdenum grade. On this basis，the cutting boundary optimized parameters were determined to optimize cutting boundary according to the established mathematical L-G model in MineSight software method. A optimization effect was achieved for realizing the most optimal resources utilization and sustainable development.
    The Continuous Scheduling Grade Prediction Model for Ore Drawing with Block Caving Method
    ZHAO Shou-Peng, MA Cong-An, CAI Cai-Hua
    2010, 39(1):  45-47. 
    Asbtract ( 1633 )  
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    The ore drawing principle of block caving method is briefly introduced，and the principle of laubscher grade prediction is expatiatedIn view of some shortcomings that the scheduling grade can not be calculated at ore-drawing stage by this method，the continuous grade prediction model is establishedAnd then scheduling grade prediction software is proposed by using VB language and Access database technology.
    Numerical Simulation Analysis on Wall Rock Stability in Transition from Open Pit to Underground Mining
    WANG Jun
    2010, 39(1):  48-50. 
    Asbtract ( 1831 )  
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    The influence of induced stress on wall rock stability under transition from open pit to underground mining was researched by the finite element numerical simulationIt is indicated that plane stress greatly influence the wall rock stabilityWhen the side press modulus is over 0.5，the plane-stress has a disadvantage influence on wall rock; When the side press modulus is over 2.0，the disadvantage influence extends rapidlyThe ream arch structure exists in wall rock which can undertake the upside load through this structure.
    Research on Mining District Change in Open-pit Mine Based on AHP
    CHEN Yan-Long, CAI Qing-Xiang, ZHOU Wei, ZHANG Wu-Ping, XU Kun
    2010, 39(1):  51-53+179. 
    Asbtract ( 1863 )  
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    Some indexes such as the in-pit haulage system development during and after the mining district steering and the production stripping ratio are affected by the mining district steering manner in open-pit mines，which directly influences the economic benefit in surface mines. Main indexes affecting mining district steering were studied; the AHP analyzing model of mining district turning was established. A case study was carried out dealing with mining district turning in ATB surface mine，and the correctness and practicability of such method was validated. The research method and the conclusions adopted own great reference value to similar mines.
    Research on Dressing-Metallurgy Combination Processing for Yunnan a High Phosphorous Limonite Ore
    BAI Shao-Jun, WEN Shu-Ming, LIU Dian-Wen, ZHANG Wen-Bin
    2010, 39(1):  54-58. 
    Asbtract ( 1780 )  
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    A iron ore in has complex properties of containing valuable limonite and many impurity phosphor and silicon.It is a refractory high phosphorus limonite ore due to its high impurity content of both phosphorus and silicon.The phosphorous mainly occurs as collophanite or in the form of isomorphism in limonite.Basing on its process mineralogy research，a process consisting of reverse flotation-magnetization reductive roasting- ultrafine grinding magnetic flocculation was adopted for treating this ore.As a result，an iron concentrate grading 69.57%,at a recovery of 71.62% with P-content reduced to 0.29%， S-content is 0.17%，Si-content is 5.75%， was obtained，thus providing a new way for the separation of similar high phosphorus limonite ore.
    The Effects of Organic Dibasic Acids on Floatation Behaving   of Feldspar and Quartz and its Mechanism
    DING Ya-Zhuo, YIN Wan-Zhong
    2010, 39(1):  59-61+66. 
    Asbtract ( 2532 )  
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    The effects of propanedioic acid，succinic acid，hexanedioic acid，sebacic acid and oxalic acid on floatation performance of feldspar and quartz in dodecyl amine system were investigated. The results showed that organic dibasic acids were activators to both feldspar and quartz in dodecyl amine system at pH 2. The active strong-to-weak sequence of organic dibasic acid on feldspar is oxalic acid，propanedioic acid，succinic acid，hexanedioic acid and sebacic acid. The active strong-to-weak sequence of organic dibasic acid on quartz is propanedioic acid，succinic acid，hexanedioic acid，sebacic acid and oxalic acid. In dodecyl amine system，oxalic acid can be as the effective modifier to float feldspar from quartz in dodecyl amine system at pH 2.
    Study on Re-concentration of Miaogou Iron Concentrate
    LI Xin, LIU Chun-Xia, WANG De-Zhi, WANG Ai-Dong
    2010, 39(1):  62-66. 
    Asbtract ( 2003 )  
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    At present，the grade of Miaogou iron concentrate was only 64.26% with high content of silicon. For this，anion reverse flotation for magnetic iron concentrate was studied. Tests under such different conditions as rougher time，pH，dosage of starch，CaO and collector，pulp temperature and pulp density effecting reverse flotation results and cleaning flow-sheet tests were conducted to determine proper flotation conditions and technology and obtain final iron concentrate products with iron grade of 69.12% and iron recovery of 88.89%. Research results showed that re-concentration of magnetic concentrate was an efficient way to increase iron concentrate grade.
    Discussion on the Reasonable Ore Matching Ratio of Magnetite and Hematite in Pellet
    XUE Min
    2010, 39(1):  67-70. 
    Asbtract ( 1898 )  
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    Since magnetite concentrate in AnSteel Groupe mining corporate do not fully meet the consumption requirements of pellets，hematite and magnetite concentrate are mixed to prepare pellets. The ore matching ratio of iron concentrate of 30∶70 in Anqian mining company and Dagushan dressing plant can meet the demand of pellet production at each indicator. The pellet-forming mechanism for two kinds of mineral ores and the reduction feature and reaction mechanism of pellets are discussed. Hematite pellet by adding limestone and other additives can form CaO·Fe2 O3or CaO·SiO2to make fresh pellet consolidated at the oxidation of the atmosphere and can produce the qualified pellet at 1 200 ℃ or less.
    Study on Adsorption Reaction Dynamics of Micro-fine Hematite
    LI Feng-Jiu, NIU Fu-Sheng, JIA Qing-Mei, LI Huai-Xiang
    2010, 39(1):  71-74. 
    Asbtract ( 1826 )  
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    The reaction equation of the starch and micro-fine hematite has been put forward combining with the collision theory. After analyzing the equation and test data，the reaction order of the starch and fine hematite particle obtained by integration method and half-life method can be approximately seen as the first level. It lays the foundation for research on adsorbing rate equation of this system. 
    Study on Zero Tailing Discharge Technology of Polymetallic Copper Mine
    WANG Hong-Zhong
    2010, 39(1):  75-80. 
    Asbtract ( 2063 )  
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    The properties of multi-metal mine are characterized. The recovery processes of copper，molybdenum，gold and silver are introduced. And the optimum conditions of Cu-Mo separation are discussed. By combining with the gravity and flotation process，improving flow-sheet structure of fast floatation process，and optimizing the system of floating reagent，the grade of Mo concentrate can be above 50% steadily at an 85% recovery，meanwhile，gold and silver recovery be increased by 10% and 5.6% respectively. The environmental pollution can be solved by producing non-burned and steam-free bricks，so that the comprehensive utilization of multi-metal resources will be realized.
    Research on Comprehensive Recovery of a Copper-silver-gold Bearing Polymetallic Ore
    QIU Ting-Sheng, SUN Zhong-Mei, ZOU Lai-Chang
    2010, 39(1):  81-83+141. 
    Asbtract ( 1890 )  
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    The silver polymetallic ore is a kind of refractory inter-grown copper-lead-silver-gold complex ore. A large number of research tests on beneficiation process consisting of mix-flotation，concentrate cyanidation，lead separation priority from cyanide residue and then copper have been carried out. The result shows that adding the leaching aid is of benefit to improve the recovery of gold and silver during the process of cyanide leaching. It is important to adopt a reasonable activator in order to activate copper and improve the copper recovery during cyanide residue flotation. After optimizing of reagent system in each link of process，the comprehensive recovery rate of gold reaches 80.80%，the silver recovery 72.03%，furthermore，the copper concentrate grade is up to 21.46% with the recovery of 70.80%.
    Experimental Study on Beneficiability of a Certain Copper Oxide Ore
    LIU Shu-Xian, NIU Fu-Sheng, ZHANG Jin-Xia, LI Feng-Jiu
    2010, 39(1):  84-86. 
    Asbtract ( 1600 )  
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    The main minerals in a copper mine are copper oxide. According to the ore property，copper oxide ores can be recovered by flotation．For the crude ore with Cu grade of 4.50%，a copper concentrate grading of 13.82% at a 97.41% recovery can be obtained by the closed circuit process of one grinding-one roughing-two scavenging -two cleaning flotation. 
    Research on Factors of Refractory Minerals in Beijin Ore Area of Gansu Laojinchang Gold Mine
    DU Shi-Yong
    2010, 39(1):  87-89. 
    Asbtract ( 1857 )  
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    Based on the ore nature of Beijin ore area，and in combination with the actual production，reasons for refractory ores in Beijin gold mine are analyzed. Meanwhile，through the actual production and empirical data，it is proved that this heap leaching process do not suit this kind of ore. The research provides a good reference for rational exploration and utilization of similar ores resources in this area. 
    Flotation Performance of New Type Collector Blashale Promoter in Ni-Mo Black Shale Ore
    LIU Jian-Dong, SUN Wei, SU Jian-Fang, SUN Lei, ZHANG Gang, HU Yue-Hua
    2010, 39(1):  90-92+98. 
    Asbtract ( 1674 )  
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    It is quite difficult to make use of Ni-Mo Black Shale Ore as mineral resources.  In order to develop this resource，the new type of flotation reagent，Blashale promoter，was adopted to do flotation tests on Ni-Mo black shale ores. Through flotation condition tests and exploratory experiments，the best reagent system and open circuit flotation process were determined. And a closed circuit test was also carried out under optimum conditions. Then，a concentrate containing 9.58% of Mo with molybdenum recovery of 82.63% was obtained，providing a reference for utilization of this resource in future.
    Preparation of Artificial Geo-polymer of a New-type Environmental Function Material and Discussion on Its Mechanism
    NA Qiong
    2010, 39(1):  93-98. 
    Asbtract ( 1662 )  
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    With metakaolin and fly ash as raw materials，the high performance artificial geo-polymer is prepared which results from the chemical polymerization reaction with alkaline activator at low temperature of between 50℃ and 100℃. The test results showed that when the mole ratio Na2O/SiO2 is 0.30，the mole ratio SiO2/Al2O3 is 3.7，and the mole ratio H2O/Na2O is 17 of the optimal oxides，the 1-day compressive strength of the geo-polymer can reach 47.19 MPa，and the 28-day compressive strength can reach 53.81 MPa. The microcosmic mechanisms of artificial geo-polymerization were assessed through a variety of techniques such as X-ray diffraction (XRD)，scanning Electron Microscopy (SEM) and Infrared (IR) spectroscopy.
    Forecast on the Geological Conditions of Work Face in Tunnel with Ground Penetrating Radar
    HE Yong-Hua
    2010, 39(1):  99-102. 
    Asbtract ( 1878 )  
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    The ground penetrating radar is a geophysical method using high-frequency radio waves to assure the distribution of the internal materialThe negative impact of fault，groundwater，fracture on the geological circumstances often induces collapse，cave，gushing water and other geological disastersThis method can accurately forecast the geological conditions within about 20 meters in front of work faceTaking the examples，a specific interpretation on the geological radar scanned image was carried out，and the actual excavation of the tunnel was tracked on siteA comparison between the design and forecasting results and the exposed actual conditions was made，showing that the ground penetrating radar is a better method of TSP in tunnel construction
    Analysis on Metallogenic Geological Conditions and Prospecting for Mozigou Gold Mine in Danba of Sichuan
    XIONG Fa-Hui, XIAO Yuan-Fu, SUN Yan, HUANG Yao-Zong, FENG Wei, NIU Gang
    2010, 39(1):  103-107. 
    Asbtract ( 1716 )  
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    The geological structure in Danba Mozigou gold mining area mainly is Tong lufang anticline in formation with hot domalAnd the center of the anticline is a metallogenic carbonaceous-phylliteThe magmatite，metamorphic -deformation band and structure of the mine area collaboratively control the formation of ore bodies，and there are many ductile shear band and fracture zonesThe main structures for ore reverse are NE-SW structure likely echelon and Secondary faults with approximately EW structure，in form of mineralization quartz veinBecause carbonaceous-phyllite can adsorb gold when hydrothermal in the mineralized quartz vein raised through them，and then gold is concentrated with the formation of cysts，lens，layer shaped gold bodyAll things are compared with Muruntau gold deposit from the ore rocks，the mineralization stages，the mineral composition，and elemental composition，resulting that it owns the typical geological feature of Muruntau gold deposit And there is a good potential prospect in peripheral and deep ore areas
    The Control Effect of Fracture on Gold Ore-forming and the Prospecting Direction in Gaoqiao-Taiyang Area
    ZHOU Hui-Wu
    2010, 39(1):  108-111+115. 
    Asbtract ( 1675 )  
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    The area of Gaoqiao-Taiyang is the important metallogenic part in west QinglingThrough research on the relation of faulted structure and gold deposits in this area，the faulted structures are divided in different type and the control effect of fracture on gold ore-forming is deeply studiedIt is pointed out that the regional boundary fracture with thrusting towards south and north direction of dip and large subsidiary fracture are the principal ore-control and rock-control structure and the ore-prospecting structure of gold mineAnd these miniature subsidiary fracture and branching fault towards south in dip are principal control structure and host structure of gold orebodyIn combination with the distribution of magmatite，the favorable ore-forming position for gold is pointed out，and has been proved in practice
    Proposal Improving Measurement Accuracy Method for Blind Shafts in Hetai Gaocun Gold Mine Area
    CHEN An-Bin
    2010, 39(1):  112-115. 
    Asbtract ( 1568 )  
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    After the error estimation，it is pointed out that the precision of the original underground wire branch in Hetai Gold Mine can not meet the requirement of the proposed blind shaft excavation engineering survey. Improving the relative precision of local wire branches can resolve the survey issue of this blind shaft through the precision calculation by adopting two directional wells and improving the accuracy of angle measurement.
    Research and Application of WDPF-Ⅲ XRF Pulp Grade On-line Analysis System
    FENG Lu-Ping, CHEN Yong-Liang, ZHANG Kun, ZENG Yun-Nan, ZHAO Ben-Qi, WANG Wei-Ming
    2010, 39(1):  116-118+121. 
    Asbtract ( 2263 )  
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    A set of pulp grade on-line analysis system，which was based on energy dispersive X-ray fluorescence analysis (EDXRF) technology and produced independently by our institute is introduced. The analysis system can realize on-line detection on pulp grade in real-time. After on-site practical application at Suzhou Xiaomaoshan Copper-Lead-Zinc Mine，good results have been achieved. At present，the system can perfectly meet the needs of the actual production in mineral processing，and can provide guidance in production. The dual-sensor and filter technology is adopted in the system and the interference between adjacent elements can be effectively overcome. In this way，the overall detection accuracy and equipment performance is much enhanced，thus laying the foundation for developing higher performance on-line analysis system of pulp grade.
    The Exploitation and Application of GYJ Series Roller Press in Metallurgy and Ore Dressing
    ZOU Cai-Hong, YAO Chuan-An, MA Yong-Jiu, ZHANG Guo-Min, GUO Guang-Yun
    2010, 39(1):  119-121. 
    Asbtract ( 1569 )  
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    A kind of GYJ series roller press with independent intellectual property is introduced，which is widely used in superfine crushing，grinding，beneficiation and even for lean ores in metallurgical mines. It owns characteristics of energy-saving，high automation，maintenance-free，high reliability and long service life，and has been applied in iron concentrators for two years under poor production conditions.
    Process of Tilting Slender Up-flowing and Separators of Integrated Components
    HAN Xiao-Yi, XU Jin-Kang, CHEN Jia-Dong, WANG Wen-Qian
    2010, 39(1):  122-124+127. 
    Asbtract ( 1940 )  
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    The “tilting slender up-flowing (TSU)” process is applied in Lamella separators and in Lavodune / Ladoflux classifier many years ago. However，the former are made of “Integrated Components (IC)” and the latter was of single equipment. Through introduction of Lamella，TSU process and IC design of separators are systematically investigated. And TSU thickeners，classifiers，and particle settler-oil eliminator and their applications in various sectors of mining industry are described.
    Application of Online Monitoring System of Tailing Reservoir Digitalization in Jianshan Iron Mine
    YANG Zhong-Lin
    2010, 39(1):  125-127. 
    Asbtract ( 1682 )  
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    The management and monitoring model of chengdonggou tailing reservoir of jianshan iron mine depended on fixed people，fixed period measuring and statistic counting which effected by weather，management，technique and so on，and the precision，traceability and consistency  of data were worse.So jianshan iron mine with Beijing kuangzixin mining technology CO.,ltd studied and developed the online monitoring system of tailing reservoir digitalization which operates stably and effectively.
    Optimization Study on Atomizer Ball Mill's Media of Fine Grinding in No. 2 Plant of Zhengzhou Aluminum Oxide Factory
    XIAO Qing-Fei, DONG Fang-Zhan, LUO Chun-Mei, SHI Gui-Ming, DUAN Xi-Xiang
    2010, 39(1):  128-131. 
    Asbtract ( 2024 )  
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    In view of low production capacity，poor grind fineness and high ball consumption，media optimization in atomizer mill was studied in Aluminum Oxide No.2 Factory. The result showed that the main problems lied in  low filling ratio，irrational media shape and incomplete adding ball system. The ball diameter of 60 mm was too large. After the diameter of ball was decreased to 40 mm，the production fineness was increased by 10.19%，meanwhile the filling ratio increased from 36% to 40% and the product fineness improved by 5.90 %. At the same filling ratio，qualified particles in hybrid casting balls were increased by 3.28 %，comparing with that in hybrid steel balls，and the  grinding efficiency was increased by 17.25% at -170 meshes. 
    Research on Application of Grinding Media to Beneficiation Production
    WANG Peng
    2010, 39(1):  132-134. 
    Asbtract ( 1678 )  
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    How to reduce grinding media consumption has been an effective measure of keeping energysaving and improving grinding efficiency in dressing plant. And the present situation of grinding media application in China and some problems that should be paid attention are introduced and the application prospects of multifunctional grinding media are proposed.
    Application of the Grey Theory in Analysis of Equipment Capacity for Surface Coal Mine
    LI Zhi-Ming, LI Ke-Min, ZHOU Wei, CHEN Yan-Long, ZHANG Dong-Hua
    2010, 39(1):  135-137. 
    Asbtract ( 1883 )  
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    In order to analyze the equipment capacity in surface coal mine，a theoretical model of grey system was built based on the grey system theory modeling，association degree analysis and the residual error identityThen this model was applied to analyze and predict equipment capacity of some surface coal mineIt is shown that the grey system theory can image equipment capacity because it has the virtue fitting precision and reliable prediction results according to posteriorvariancetest and precision testing gradeIt provides an important method for mine design，production planning and mining equipment capacity calculation of mining and stripping engineering，and distinguishes from the traditional static parameters methods.
    The Development and Application of 3DMine Blasting Information System Based on GIS
    CHI Xiu-Wen, ZHAO Xu, HUANG Jie-Jun
    2010, 39(1):  138-141. 
    Asbtract ( 1960 )  
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    Digital Mine is an inevitable trend of mine in the future. The concept of combining the 3D display and spatial analysis abilities of GIS with digital blast is investigated. The digital elevation model (DEM) was combined with the remote sensing image data to make up the surface，with the geological strata based on MultiPatch to generate mine model，blasting hole，blasting simulation to achieve the modeling and analysis of blasting vibration effects，blasting noise pollution，blasting，and the optimal path for mining field transportation respectively in mine blasting process. The system has a significant meaning to explore and research the threedimension mine blasting technique for utilizing the mine resources.
    The Evaluation and Prevention of Heavy Metal Pollution on Development of Metal Mine——the Case of LaLa Copper Mine in Sichuan
    ZHAO Zhi-Qiang, SUN Yan, NIU Gang, SUN Jian-Dong, KANG Cong-Xuan, GONG Ji-Chang
    2010, 39(1):  142-146. 
    Asbtract ( 1996 )  
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    Lala Copper Mine is located at Huili County，Liangshan Prefecture ,Sichuan Province. It is an important base of copper production，accompanying with FeAuUMoCoRE comprehensive utilization. After decades of mining，large quantities of solid wastes have been formed in this area. Furthermore，the insufficient utilization also made the heavy metal content pretty high in this land. Hence，the heavy metal content and pollution degree of Cu，Cd，Hg，Cr，Pb，As in the soil of mine and Cu，Cd，Zn，Pb，As in the water were investigated and evaluated scientifically. It proved that soils in Lala Mine is seriously polluted by cadmium，heavily polluted by mercury and chromium，and moderately polluted by copper，while the soils are not or moderately polluted by lead，and water in the Lala Mine is seriously polluted by copper，cadmium and lead. But the water is not or moderately polluted by arsenic. the solution through biology，physics and chemistry methods to prevent and treat pollution are put forwards.
    Experimental Research on Treatment of Acid Mine Wastewater with HDS Process
    HE Xiao-Lei, CHENG Yi-Song, HE Li
    2010, 39(1):  147-150+174. 
    Asbtract ( 1813 )  
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    In light of the process parameters tests on acid mine wastewater treatment，HDS can reduce the dosage of neutralizing agent as high as 16.7%，decrease flocculant dosage amount，and lower the sedimentation time of separating mud and water to be only 8min. the concentration of neutralizing slag solids for outward discharge is up to 26.7% with qualified water discharge standards.
    Research on Application of the Microseismic Monitoring System in Yunnan Huize Leadzinc Mine
    LIU Xiao-Hui, WU Ai-Xiang, WANG Chun-Lai, LI Rui, JI Xue-Wen, LI Xiang, HOU Xiao-Bing
    2010, 39(1):  151-154. 
    Asbtract ( 2221 )  
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    The composition and structure of the microseismic monitoring system in Yunnan Huize Leadzinc Mine were introduced. The ground pressure zones are defined by combining with the quantitative theoretical study on microseismic events and onsite recovery. And using the advanced seismological quantitative analysis and visual interpretation function in monitoring system，the rules of variation in stress，displacement，stiffness and stability of the activity zone were studied. It is indicated that the variation in concentrated area of the ground pressure activities has a close relationship with the underground mining activities. Before largescale rock destruction，such features will occur as rock stiffness gradually increased and then decreased，stress level increased in turn after decreased，microseismic frequency and accumulated volume sharply increased. These can provide a method and theoretical basis for prediction of the rock mass destruction. 
    Study on the Surface Movement Observation and the Degree of Mining Subsidence under Thick Alluvium layer in Yanzhou Mining Area
    ZHANG Lian-Gui
    2010, 39(1):  155-158. 
    Asbtract ( 1866 )  
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    The degree of mining subsidence under thick alluvium layer plays an important role in mining under building，railway and water bodies in Yanzhou mining area，so it's necessary to discuss the discrimination method of full subsidence degree. The surface subsidence characteristics of fully mechanized sublevel caving mining under thick alluvium in Yanzhou mining area are analyzed abased on measured data，and the discrimination method for full subsidence degree with the thickness of bedrock is put forward. The two geophysical methods of electrical prospecting and seismic exploration are applied to survey and verify the range and spatial distribution of the broken overlying strata. The conclusions have an important guiding significance for “three under” mining in this mining area.
    Application Research of Windproof and Dust Suppressing Wall in Heidaigou Openpit Mine
    LI Jin-Xu, LI Ke-Min, YANG Ming, YANG He
    2010, 39(1):  159-162+166. 
    Asbtract ( 1774 )  
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    For large coal storage yards and coal transport system，two ways of dustproof like water spray and windproof suppressing are currently adopted  However，the windproof dust suppressing technology is an optimal choice for the openpit mine field in north of ChinaThe current situation of the dust and wind preventing and controlling meshwork is introducedAnd then its principle is elaborated after testing the wind tunnels and analyzing the onsite data and based on the mechanism of dust controlling and is introduced in classificationFinally，the successful application of windproof and dust suppressing wall in Heidaigou openpit mine is discussed
    The Impact Analysis of Joints Density on the Maximum Ground Subsidence Value
    DU Rong-Jun, XIA Yu-Cheng, WU Zhi-De
    2010, 39(1):  163-166. 
    Asbtract ( 1738 )  
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    In order to find out the impact degree of joints density on the maximum ground subsidence value，and based on the numerical simulation，the average degree in the software was adopted to approximately represent the joints density，then the changes of acoustic emission in the overburden and ground maximum subsidence value were studied in different degreesThe result showed that as the average degree increases，the energy and scope of acoustic emission would decrease，so did the ground maximum subsidence value
    Principle and Realization of Microseism Location
    PING Jian, LI Shi-Xiong, CHEN Hong-Yan, XIA Yuan-Yuan
    2010, 39(1):  167-169. 
    Asbtract ( 1764 )  
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    According to the basic algorithm of source location，a Matlabbased positioning procedure of the source was establishedThe Microseismic monitoring data of practical projects were used for source positioningThe 3D groups of the location were displayedThe positioning results and the actual source location are compared with the results by Siroseis software to verify the practicality of the procedureThe microseismic monitoring technology and its research status were researchedThe arrival time of P wave was the main parameter to discuss the microseismic waveformThe way of data optimization grouping and its impact on the positioning accuracy were discussedThe microseism location algorithm and its process and outcome of the realization were introduced in detail，and the reason of the location error was described.
    Analysis on the Approaches of Utilization for Steel Slag with the Analytic Hierarchy Process
    DENG Qi, WANG Qi, HUANG Qi-Fei, WANG Qun-Hui
    2010, 39(1):  170-174. 
    Asbtract ( 1661 )  
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    According to the principle of the Analytic Hierarchy Process，a ladder hierarchical structure model was built from three factors of economy index，environment index and steel slag index. Taking steel slags from a Shandong Iron and Steel Company as a case，and along with the specific demand in exploring ways of steel slag as resources，the relationship between the attributes of steel slag and reusing approaches of it was investigated from the chemical composition and phase composition of the steel slag，and the different nature of resources were found out as a structural model index of resource. Then the three related factors on modeling were processed qualitatively and semi-quantitatively. In consequences，the decision-making analysis and evaluation on optimum schemes for steel slag utilization were realized，which can be referred by government and environmental policies' makers.
    Process Design of Steel Slags Products by Magnetic Separation and its Production Practice
    YU Ke-Xu, ZHOU Zheng, SONG Bao-Ying
    2010, 39(1):  175-177+182. 
    Asbtract ( 1687 )  
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    The paper describes the characteristics of steel slags，the flowsheet and  the practical situation in production，and introduces the beneficiation equipment as well. The conventional devices in concentration are adopted to solve the puzzles in treatment of steel slags，which supplies the new resources for iron and steel company. This method can greatly decrease the costs and create a notable economic benefit.
    Experimental Research on Titanium Dioxide Recovery from Iron Tailings
    NIU Fu-Sheng, LI Huai-Xiang, ZHOU Shan-Shan, WU Gen
    2010, 39(1):  178-179. 
    Asbtract ( 1651 )  
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    Abstract The tests of grinding - high intensity magnetic separation - shaking- flotation process on iron tailings are carried out，showing that titanium dioxide concentrate with grade of 47.15% at a 39.48%recovery and productivity of 3.86% can be obtained under condition of grinding fineness of 70% -0.074 mm and the magnetic field strength of 994.725 kA/m from rough mines with titanium dioxide grade of 4.61%.