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Table of Content

    15 April 2008, Volume 38 Issue 04
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    On Key Problems in Improving Safety Level of Non-Coal Mines
    LI Shi-Jie, GUO Jin-Ping, ZHAO Hong-Sheng
    2008, 38(04):  1-6+10. 
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    The paper introduces the present status of the non-coal mine safety production in China and the causes of accident evolvement, and describes in detail the building of multidimensional secure platform for improving non-coal mine safety level from the aspects of resource integration, safety legal regulation system, supervision and law enforcement procedure, exploitation of professional human resource, design of mine industrial safety mechanism, green mine and mine safe production.
    Application of InSAR Extension and Fusion Techniques in Mining Monitoring
    FAN Hong-Dong, DENG Ka-Zhong, CHENG Da-Yu
    2008, 38(04):  7-10. 
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    The feasibility of the application of InSAR and its extension and data fusion techniques in mining monitoring is studied.The analysis indicates that its application in mines will not be limited to monitoring the ground surface subsidence, it can also play an important role in monitoring the tailing instability and spontaneous combustion, surveying for mine topographic map revision and mending, and monitoring the mining of illegal mines.Therefore, it can be seen that InSAR technology has very wide application prospect in mining monitoring.
    Development Status and Prospect of AnSteel's Mining Technology
    MA Xu-Feng, SONG Ren-Feng
    2008, 38(04):  11-12+22. 
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    The development trend of domestic and foreign mining technology is presented, including the development towards process continuation in mining technology and towards diversity and effectiveness in transport modes, the development of undisturbed mining technology, the mine digitalization and intelligentization, and the manless mining technology.The development status of the mining technology of Ansteel's mines is described in resptect of open-pit mines and underground mines, the characteristics of AnSteel's mining technology are analyzed, and the suggestions on speeding up AnSteel' mining technology are given.
    Role of Bacterial Mixture in Biohydrometallurgy
    CHEN Bo-Wei, WEN Jian-Kang
    2008, 38(04):  13-17+36. 
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    Biohydrometallurgy involves diversified microorganisms and up to now, bacteria of 13 genera are reported to have relation with bioleaching of metal sulfides.The bioleaching of metal sulfides can involve three mechanisms, namely, indirect bioleaching, contact bioleaching and cooperative bioleaching, with the indirect bioleaching following two functional pathways: thiosulfate and polysulfide.Though bacterial mixture bioleaching offers many advantages over that of using a single bacterium, it also has some unfavorable effects and its bioleaching mechanism is not very clear now.Therefore, to better utilize biohydrometallurgy technology, research on bacterial mixtures should be intensified for controlling their composition and activity so as to optimize the biohydrometallurgical process.
    Numerical Simulation Study on Occurrence Mechanism of Underground Mud-Rock Slides
    DU Jian-Hua, KUANG Zhong-Xiang, SONG Wei-Dong, WANG Yong-Qing
    2008, 38(04):  18-22. 
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    In view of the increasingly more serious hazard due to the frequent underground mud-rock slides in metallic mines where caving mining method is adopted, with the process of underground mud-rock slide in Chengchao Iron Mine as the engineering background, a numerical calculation model is built, which composed of ore layer, overlaying layer, water partition layer and mud-rock slide layer.PFC3D numerical simulation software is used in the study of the dynamic process of mud-rock slide.The dynamic evolution process and mechanism of underground mud-rock slide is preliminarily revealed and its mechanical essentials and prevention and control measures that should be taken are summarized.
    Effect of Blasting of Layered Slope Rockmass on Characters of Weak Intercalation
    SONG Xiao-Lin, ZHANG Ji-Chun, CAO Xiao-Jun
    2008, 38(04):  23-26+36. 
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    To investigate and determine the effect of excavation blasting on the characters of the weak intercalation in the layered rock slope is the prerequisite for correctly carrying out the slope stability analysis and its retaining structure design The authors, in combination with the site short-hole lamination blasting test,  investigated the change in the weak intercalation characters during short-hole blasting by LS-DYNA3D simulation, discussed the displacement distribution, compactness and change law of the weak intercalation at positions with different distances away from the blasting source, and deduced the critical displacement value (0.1mm) leading to the lamination breakage by blasting and the approximate calculation formula for the compactness.Furthermore, based on the simulation of the lamination breakage effect of long-hole blasting under the same geological conditions, the difference between and causes of long-hole and short-hole blasting in the effects on weak intercalation characters were analyzed.The investigation results show that short-hole blasting forms near-round blasting cavities with about 28.7cm radius that are slightly projecting in upper, lower, left and right directions, while in the case of long-hole blasting, the near-round blasting cavity behind the charge has a radius (89.1cm) that is far smaller than that ( 138.7 cm) of the cavities in the other three directions and the upper and lower surfaces of the weak intercalation strongly backward curves.With the increase of the distance to the blasting source, the displacement of the weak intercalation is gradually decreased and when the distance is smaller than 40 cm in short-hole blasting and 100 cm in long-hole blasting, the displacement decreases very rapidly with the decrease of the distance.The compactness of weak intercalation is high near the blasting source and decreases rapidly and with the distance increase, the compactness decreases gradually.
    Optimized Design for Karst Water Drainage Test of An Iron Mine in Fujian
    CHEN Yan-Mei, CHEN Zhi-Hua, WANG Tao
    2008, 38(04):  27-30. 
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    An iron mine in Fujian that is mining a hydrologically complicated deposit with karst water, faces the problems of not only high water pressure and high water inflow but also unclear local depth hydrological conditions when transiting to depth mining.Therefore, it is imperative for it to carry out large scale drainage test.The paper describes how to design the drainage test in accordance with the hydrological conditions and production demand, including the selection of the drainage test mode and test engineering layout, rational design of the test sequence, and estimation of drainage flowrate and drawdown to satisfy the requirements of reducing the karst water level and verifying the hydrological conditions.There are some innovative techniques that are adopted in the design of underground drainage test such as the combined drainage of both the sublevel and its advanced sublevel, and non-uniform layout of drain holes, which can be references for the drainage tests for depth mining of other mines.
    Optimization of Process and Structural Parameters of Long and Medium Hole Drilling, Blasting and Fragmentation
    LIU Min-Sheng, FAN Zuo-Peng
    2008, 38(04):  31-33. 
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    In view of high rate of large blast fragmentation, a big difficulty in long and medium-hole drilling and blasting, it is pointed out at the same time of taking integrated technical management measures, the key is to optimize the drilling and blasting parameters, adopt “minimum burden” blasting technique, renew the fragmentation process, and use new process of hole bottom reverse initiation; and optimize the initiation network and use safe, reliable and economically rational duplex initiation network.The production practice shows that under the guarantee of strictly controlled construction quality, the application of optimized blast fragmentation technique has radically solved the problem of high rate of large blast fragments, thereby achieving good technical and economical indexes.
    Analysis of Factors Influencing Determination of Cover Layer Thickness in Transition from Open Pit to Underground Mining
    QIAO Guo-Gang, LI Zhan-Jin, YANG Dan-Dan, LI Rui, WANG Yan
    2008, 38(04):  34-36. 
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    The determination of a reasonable cover layer thickness has always been a puzzle for mines that are transitioning from open pit to underground mining.Starting from the function of the cover layer, and based on the analysis of the factors influencing the cover layer thickness, the relationship of the cover layer thickness with the mining technology, and with the mine water prevention and drainage were discussed, the model for the relationship between the height of drawing ellipsoid and that of loosening body was deduced and test was conducted to measure the leakage factor of the cover layer formed by granular rock, hereby providing a theoretical guidance to the determination of the optimized cover layer thickness for the mines transitioning from open pit to underground mining.
    Application of Reinforced Soil in Regulation of Gushan Pit Slope
    WANG Wen-Jing, LI Guo-Ping, LI Qi, 吕Neng-Gong
    2008, 38(04):  37-39. 
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    The paper analyzes the sliding of the Quaternary system near-river section slope at Gushan Pit, and evaluates the regulation effect of the internal and external stability of the sliding slope by filling with reinforced soil.The regulation of slope sliding with reinforced soil and watertight curtain has achieved good effect.
    Extension of Development System in Henan Tongbai Yindongpo Gold Mine
    TAO Ke-Yu, LI Jia-Quan, LIN Xiang-Hong
    2008, 38(04):  40-42. 
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    Mine development system is not unchangeable.With the relay of stoping sections and levels, rational production concentration and improvement of the equipment level, the underground mine's development system will need transformation in certain time, with the transformation centered on the extension of mine development, transformation of the production system, and the alteration and expansion the product shafts.The change in the development system can have great impact on the mining, safety, mine look and economic benefit of the production shaft.In light of the real situation of Henan Tongbai Yindongpo Gold Mine, the paper analyzes the factors that should be considered in the design for the development system extension, and puts forward some problems that should be solved in the production relay.
    Test Research on Beneficiation of Sichuan High Phosphorus Oolitic Hematite and Limonite Ore
    LI Guang-Tao, ZHANG Zong-Hua, ZHANG Yu, WANG Ya-Jing
    2008, 38(04):  43-46+55. 
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    The iron minerals in a Sichuan iron ore occur mainly in form of oolitic hematite and limonite.With a phosphorus content of 0.604%，the ore belongs to high phosphorous refractory ore, and can not be satisfactorily processed by conventional mechanical beneficiation method.In the test, a process consisting of reduction roasting, low intensity magnetic separation and reverse flotation was used for this ore, obtaining an iron concentrate containing 60.92% iron and 0.225% phosphorus at an iron recovery of 72.74%, thus solving the difficult utilization problem of this ore due to its low iron grade and high phosphorus content.
    Test Research on Direct Reduction-Magnetic Separation of Super-Fine Lean Hematite Ore
    XIAO Yong-Zhong, DI Yong, ZHU De-Qing, PAN Jian, CUI Yu, XU Dong-Liang
    2008, 38(04):  47-49+98. 
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    A Hunan hematite ore belongs to ferruginous slat and is of low grade.Its main iron mineral is hematite, which mostly occurs in about 3~5 μm size, has a complex association with quartz and can not be effectively separated by conventional processing method.Therefore, the process of coal-based direct reduction-magnetic separation was adopted for this ore.As a result, an effective iron enrichment was realized and a reduced ore obtained at a metallization rate of 93.82% by coal-based direct reduction at a reduction temperature of 950 ℃, time of 80 min and coal/ore mass ratio of 2.5∶1.The reduced ore then went through three stage grinding and three stage magnetic separation.An iron concentrate was produced, with the metallization rate bring as high as 98.02% , iron grade being 69.54%and iron recovery being 65.58% (to the run-of-mine ore).
    Test on Flotation Activation of Gold Ore Polluted by Underground Filler
    JIN Huai-Xia, ZHANG Shu-Xia, SHEN Yu-Quan
    2008, 38(04):  50-52+63. 
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    In view of the gold recovery reduction of Shandong Xincheng gold ore due to its pollution by underground alkaline filler, the activation flotation test was made with sulfuric acid, oxalic acid of industrial grade and copper sulfate.The results show that sulfuric acid can achieve a good activation effect for both slightly and seriously polluted ore, improving the total gold recovery by 2~3 percentage points; industrial oxalic acid is good only for slightly polluted ore and has not evident effect on seriously polluted ore; and copper sulfate has a poor activation.
    Research on Column Flotation Process for A Gold Ore
    LIU Jie, LIU Jiong-Tian, CAO Yi-Jun, LI Zhen
    2008, 38(04):  53-55. 
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    The structure and technique feature of cyclonic-static micro bubble flotation column are described.The cyclonic-static micro bubble flotation column was used in the research on the column flotation process for a Shangdong gold ore.The results indicate that even after the elimination of one scavenging and two cleaning steps from the flowsheet used on site, a concentrate that can satisfy the cyanidation requirement can be achieved, and what's more, the recovery exceeded that of the site flotation.
    Preparation of CaCO3 Whiskers with Soluble Phosphate as Controller
    LI Li-Xia, HAN Yue-Xin, ZHU Yi-Min, WANG Yu-Bin, TAO Shi-Jie
    2008, 38(04):  56-59+63. 
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    Well crystallized aragonite CaCO3 whiskers of high aragonite phase content were prepared by one-step method with soluble phosphate as controller from Ca(OH)2 suspension in common gravitational environment.Meanwhile, the effects of controller dosage, reaction temperature, CO2 flow rate, and initial Ca(OH)2 concentration on the product were investigated and analyzed.XRD spectra has revealed that it is Ca5(PO4)3(OH) rather than Ca(HPO4)·2H2O or Ca3(PO4)2 that is served as crystal nucleus leading to the formation of aragonite-type CaCO3 whiskers. The conditions favorable to the growth of carbonate whiskers include n(Ca/P)=1∶0.25,a carbonization reaction temperature of 75 ℃,CO2 flow rate of 16.2~32.4 L/(h·kg) and an initial Ca(OH)2 concentration of 1.5 wt.%~5.6 wt.%.
    Study on Surface Modification of Basic Magnesium Sulfate Whiskers
    JIANG Yu-Zhi, HAN Yue-Xin, YIN Wan-Zhong, CHEN Xu
    2008, 38(04):  60-63. 
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    In order to improve the surface property of basic magnesium sulfate whiskers and its compatibility with organic matrix material, study on the surface modification of self-made basic magnesium sulfate whiskers was made by chemical coating method, with the activation index and contact angle as the evaluation indicators for modification effect.The results indicate that the suitable modifier for basic magnesium sulfate whiskers is potassium oleate.At a potassium oleate dosage of 2%, pulp concentration of 4%, modification time of 30 min, modification temperature of 80 ℃, and an agitation speed of 600 r/min, a good surface modification effect can be achieved, with the activation index of the modified basic magnesium sulfate whiskers reaching 99.35% and the contact angle being 126.8°.
    Comparison between Microwave and Roast Activation of Attapulgite
    HU Fang, HU Hui-Ren, ZU Bin, WU Xue-Dong
    2008, 38(04):  64-66+133. 
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    Run-of-mine attapulgite clay was activated by roasting and microwave respectively after its purification and grinding by ball mill.Comparative analysis was made of the two activated products by FT-IR and TEM.ROM attapulgite clay, purified product and two activated products were used as micro-particles to form a micro-particles retention system with cationic polyacrylamide (CPAM) respectively, which was used in the retention test for an alkaline peroxide mechanical pulp (APMP).The test results indicate that roasting activation has a greater effect on the composition and structure of attapulgite than microwave activation, while the latter can more evidently improve the dispersity of attapulgite; both activations can obviously improve the retention effect of the retention system made up of attapulgite and CPAM, and however, the performance of the system with microwave activated product is better , with the first pass retention rate of APMP reaching 92.46%.
    Pretreatment of Brazilian Specularite before Pelletization by High Pressure Roller Grinding
    ZHU De-Qing, TANG Yan-Yun, Vinicius Mendes, PAN Jian, DI Yong
    2008, 38(04):  67-70+92. 
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    To alter the very low proportion of Brazilian specularite in the feed of oxidized pellets, new technique of high pressure roller grinding (HPRG) was adopted in its pretreatment before the pelletization.The pellet feed composing 70% Brazilian specularite and 30% concentrate of magnetic separation was pretreated by HPRG at 71% circulating load in a simulated closed circuit, and then mixed with 2.4% bentonite, and pelletized for 15min at 8% moisture.The resultant green pellets achieved drop strength of 4.5 times, compression strength of 10.25 Newton per pellet and thermal shock temperature of 455 ℃.When the green pellets were preheated at 1 050 ℃ for 10 min and roasted at 1 280 ℃ for 12 min, the fired balls had compression strength of 2 690.88 Newton per pellet, satisfying the requirement of palletizing production.
    Progress in Flotation Kinetics Researc
    LUO Xian-Ping, HE Li-Ping, ZHOU Xiao-Wen, FU Dan, CHENG Li-Li
    2008, 38(04):  71-74+102. 
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    The paper describes the development course of flotation kinetics research, discusses the progress in the flotation kinetics research from practical model of flotation kinetics, the interpretation of the rationality of flotation behavior and flotation process by flotation kinetics and the flotation kinetics of flotation equipment, and prospects the future development orientation of flotation kinetics.
    Status Quo of Research on Copper-Bismuth Separation
    HAN Zhao-Yuan, GUAN Ze-Gao, LU Yi-Ping, WANG Guo-Sheng
    2008, 38(04):  75-76+108. 
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    The properties of chalcopyrite and bismuthinite are described.The progress in the research of the flotation separation and the wet separation of copper from bismuth are discussed.
    Quick Determination of Aluminum Content in Iron Ore by EDTA Volumetric Method
    ZUO Ping, HU Zheng-Mao
    2008, 38(04):  77-79+83. 
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    In the determination of the aluminum content in iron ore by EDTA volumetric method, the interferential elements must be removed in advance.The conventional process for the separation is rather complicated and involves three steps: organic agent extraction, weak alkalescent separation and alkaline separation.Two-step method involving only ammonia separation and alkaline separation was used to simplify the traditional one and the favorable conditions were determined for each step by experiments.The results of the comparison with the real standard test sample indicate that the improved method can meet the requirement in both accuracy and precision, and is capable of rapid determination of the aluminum content in natural iron ore, iron concentrate, sintered ore and pellets in scope of 0.25%～5.00% aluminum content.
    Analysis of Landform Change in Shanxi Pingshuo Open-cast Mine Area
    ZHOU Wei, BAI Zhong-Ke, YUAN Chun, YUAN Tao, QIAN Ming-Jie
    2008, 38(04):  80-83. 
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    As a major component of regional physical environment, topographical fluctuation and change characters directly affect the material transportation, energy allocation, landscape, land utilization and agricultural production of land surface.Using the DEM data of 1∶2 000 scale, and based on the digital terrain analysis, a contrastive research was conducted on the change in height-area, landform aspect and landform slope between the original and manmade padding landforms in Pingshuo opencast coal mining area, which was formed due to intensified artificial activities of 'stripping- disposal- land building'.The research indicates that: ①the land area of the same slope has changed obviously.That is, the area of the manmade padding landform with a slope lower than 6° is 326.59 hm2 more than its original counterpart, while for that with a slope greater than 15°, the amount is increased to 502.15 hm2.②The land area of the same aspect has also changed.The area of manmade padding landform of shady and semishady slopes is 188.13 hm2 more than the original, while that of sunny slope is 152.88 hm2 less than its original counterpart.③The height-surface area has changed.At the same height, the manmade padding landform has larger surface area than the original, with the differences being most remarkable at the height of 1 475 m, 1 425 m and 1 350 m.
    Application of Weighted Overlay Model in Resource Forecast of Lead-Zinc Ore Rich Areas in Northwest Hebei
    LI Sui-Min, YAO Shu-Zhen, HAN Yu-Chou, HAO Hua-Jin, CHEN Shu-Qing
    2008, 38(04):  84-87+116. 
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    Northwest Hebei is an important lead-zinc-silver polymetallic ore-rich area in the province.Based on the previous research and knowledge, the ore bearing strata, five km rockmass buffer area, and 1 km and 3 km composite overlay buffer areas of different level structures and abnormal areas found in geochemical and geophysical exploration that were closely related to ore formation were extracted from GIS platform.Weighted overlay model was used on ArcView platform to carry out the forecast and evaluation of ore formation prospective zone in the areas under study.Through setting up of two different influence ratios for evidence layers, it was found that there was a poor coincidence between geochemically abnormal areas and known deposits, and therefore, in prospective area forecast, geochemical exploration evidence layer should not be assigned with a too high influence ratio.However, gravity abnormality could better reflect the medium acidic rockmass at depth.In light that the known lead-zinc deposit points were mostly distributed around the rockmass, it was concluded that the ratios of the influence of geological ore-controlling factors and gravity abnormality on orebodies could be properly increased.As a result, an ideal forecast effect map was obtained, based on which the areas where further major exploration to be made were proposed.
    Improvement and Application of Inverse Distance Weighted Method
    LI Zhang-Lin, WANG Ping, ZHANG Xia-Lin
    2008, 38(04):  88-92. 
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    The paper analyzes in detail the advantages and a disadvantage of conventional inverse distance weighted methods, and puts forward a new one based on their improvement: indicator inverse distance weighted (IIDW).Compared with the classical IDWs, IIDW method makes full use of the effective information in sampling data.It can provide not only more accurate estimated values of attributes but also quantified accuracy of the estimated values.Additionally, the probability of an attributive value in a certain range of the area under estimation can also be obtained by this method.Both theoretical deduction and practical application have shown that, compared with conventional IDW methods, IIDW is a simpler, more efficient interpolation method and worth further study, application and spreading in research fields of geology, geography, aerograph, etc.
    Types of Lead-Zinc-Gold-Silver Deposits and Ore Prospecting Perspective in Daxihe-Zongpu Region
    WANG Jia-Lou, WANG Biao
    2008, 38(04):  93-95. 
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    The paper describes the geological background of the formation of lead-zinc-gold-silver deposits in Daxihe-Zongpu region, the genesis types and geological characteristics of the deposits, and discusses the ore prospecting perspective in this ore area.
    A New Method for Mineral Reserve Calculation
    LIU Shu-Hui, WANG Xian-Yong, DING Hao
    2008, 38(04):  96-98. 
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    In view of the defects in the conventional mineral reserve calculation method and geostatistical mineral reserve calculation method, a new mineral reserve calculation method that combines mean value and interpolation methods is proposed.This method first sets up the grids, divides the grids into two categories: containing samples or not, calculates their grade values by mean value method and inverse distance square method respectively, and further obtains the reserve of the grids and also of the whole orebody.This reserve calculation method can not only solve the problem of not high accuracy of the conventional algorithm but also eliminate the drawback of a too much calculation work involved in geostatistical method.The feasibility of the new algorithm has been proved in the practical calculation of the reserve of an orebody in Zijinshan gold deposit.
    Truck Transport Metering System for Open-pit Mine Based on RFID/BPRS
    WANG Chun-Yi, LI Fa-Ben, LU Liu-Wei, LU Cai-Wu
    2008, 38(04):  99-102. 
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    In light of the demand of open-pit mine on truck transport automation and its complex terrain, the truck-shovel transport metering system for open-pit mine is designed by adopting RFID (Radio Frequency Identification) and GPRS (General Packet Radio Service) techniques.This system can not only make an automatic statistics of the truck and shovel loading number, but also normalize their transport in accordance with ore blending plan, so as to improve the open-pit truck-shovel working efficiency and ensure a steady ore supply to the concentrator.This system has now been put into use in Sandaozhuang Open-pit Mine of Luanchuan Molybdenum Group.The site testing has proved that the system, being stable and capable of satisfying the mine production requirement, can greatly improve the mine's labor productivity.
    Study on Technology of 3D Visualization Based Open Pit Limit Optimization
    LI De, ZENG Qing-Tian, WU Dong-Xu, WANG De-Wen, FANG Chang-Hui
    2008, 38(04):  103-108. 
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    Open pit limit optimization is an important link in open pit design, production and operational management and is a complicated work involving an integrated consideration of mine resource conditions, mining technical condition, mineral sales price, ore mining and processing cost for maximizing the economic benefit.The study on the open pit limit optimization of Yimen copper mine in Yunnan Province is made by means of Lerchs-Grossmann optimization method and 3D visualization technology.Through the study of the parameters and method for open pit limit optimization, an economically optimized open pit limit is obtained, hereby providing a basis for direct technical scheme and investment policy decision for the mine exploitation.The main techniques and method applied in open pit limit optimization are summarized.
    Application of MICRONMINE System in Blasting Design
    GONG Yuan-Xiang, WANG Li-Guan, JIA Ming-Tao
    2008, 38(04):  109-112. 
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    The paper presents a software system that can be used in underground blasting design-MICRONMINE．With a copper mine as the research object, the system is used to establish the 3D solid model of the whole mine deposit and engineering, and based on this model, the blasting design is made.The paper expatiates and analyzes in detail the blasting design process and results.It is concluded that the platform provided by MICRONMINE can enable the process of blasting design to be intelligentized, parameterized and digitalized, thus realizing the functions of visualization, controllability and regulability in the design process, optimizing the design, satisfying the mine production requirement and achieving good technical and economical benefits.
    Application on Directional Scan Imaging Well Logging Technique in LiGuo Iron Mine
    NAN Qin-Jiang
    2008, 38(04):  113-116. 
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    The space distribution characteristics of iron ore resource buried at depth can be figured out by comparing, calculating and analysing a large amount of drilling exploration data and relative geological data.By gyro-positioning ultrasonic imaging well logging technique, we can scan the well wall in a given direction even under magnetic shielding or magnetic interference.Then, a continuous plane graph can be gained.According to the strong and weak characteristics of ultrasonic echo signals in the graph, we can visually read orebody information about occurrence of iron ore bed (spacial form of orebody), thickness and integrity, and hydrological factors about the development status of surrounding rock karst and fractures.Its application in guiding mine exploration and exploitation can reduce exploration workload, decrease exploration cost and improve work efficiency, and therefore, it is of certain popularization value.
    Management System of Control Point Survey Results Based on MapObjects
    LAN Xiao-Ji, TONG Chun, WANG Fei
    2008, 38(04):  117-119. 
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    GIS technology was used in the “management system for control point measurement results”, which has solved the long-standing problem of disorder and scattered management of control points and realized maximized data resource sharing and mutual supplement, thus bringing extreme convenience to mapping.The management system for control point measurement results is an important component of basic geographic information system.The application of GIS technology has helped realize the functions of data entry, storage and inquiry and the double-way inquiry of “from table to graph” and “from graph to table”, hereby making up the deficiency of conventional management information system and realizing an integrated management of the graphic information and attribute information of control points.
    Investigation on Optimizing Site of Accumulative Bauxite Washing Plant and Ore Blending Plan
    PEI Qi-Tao, CHEN Jian-Hong, CHENG Yun-Cai, YANG Shan
    2008, 38(04):  120-12124. 
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    Accumulative bauxite is the main source for producing metal aluminum in South China.In light of the challenge of how to rationally match the mining site with the washing plant so as to prolong the mine service life, which is faced by accumulative bauxite mines under resource relaying and whose solution is in urgent need, a mathematical model for comprehensive optimization was established for the site of accumulative bauxite washing plant and the ore blending plan by modern logistics planning, operational research and systems engineering theory, and has been successfully applied in a real accumulative bauxite mine.
    Principal Component Analysis of Influence Factors of Slope Stability
    CHEN Gao-Feng, LU Ying-Fa, CHENG Sheng-Guo
    2008, 38(04):  123-125+154. 
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    Taking a homogenous soil slope as example, orthogonal design test method and numerical processing method for principal component analysis were used in the principal component analysis of the factors influencing slope stability, which overcame the difficulty of a large amount of calculation in conventional methods, considered the interaction between factors and gave quantitative contribution of each principal component to slope stability.The investigation shows that for commonly seen homogenous soil slope or loose-stacked rock-soil slope, cohesion, angle of friction and slope height have the greatest contributions to the slope stability; and in the rock-soil mass area with a seismic fortification intensity of below seven degrees, soil density and seismic acceleration have the least contributions to the slope stability.
    Analysis of Earth Dumping Scheme for Western Dump in Yongping Copper Mine and Its Stability
    ZHANG Yong-Le, ZHOU Yu-Xin
    2008, 38(04):  126-128. 
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    The stability of the western dump in Yongping Copper Mine is reduced due to its rapid rise since the pit wall expansion and due to that most of the earth removed from the wall expansion is clay.The final earth dumping scheme and proposal are made through the engineering geological and hydrological analysis of the dump, the physical and mechanical property test of the dump dispersed material and foundation earth, and the stability analysis and comparison of the earth dumping scheme based on the previous foundation carrying capacity and FLAC3D simulation.
    Simulation Analysis of Stability of Buildings and Structures in Ground Surface Displacing Area
    LU Yang-Ze, SU Jian-Jun, JIANG Ren-Yi
    2008, 38(04):  129-133. 
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    To make sure about the safety of the buildings and structures in the surface displacing area after the deep mining at Zhongguan Iron Mine, attempt was made to use large universal finite element method-ANALYSIS to simulate the law of mining-caused surface subsidence when cementation filling was adopted.The results show that the buildings and structures in the area outside the thick orebody moving area but within the thin orebody moving area are safe, preliminarily reveal the ground subsidence law after a total tailing (cementation) filling, and indicate that the filling body can effectively control the deformation of the overlying rock, with the ground surface deformation being very weak and with no evident displacing basin formed.
    Adsorption Behavior of Ningming Bentonite for Copper Ions in aqueous solution
    MO Wei, HAN Yue-Xin, MA Shao-Jian, SU Xiu-Juan, LIAO Fang-Yan
    2008, 38(04):  134-138. 
    Asbtract ( 2073 )  
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    In order to develop the use of Guangxi Ningming betonite resource in treating heavy metal ions-containing waste water, the adsorption behavior of this betonite for the Cu2+ in aqueous solution was studied.The static adsorption test results indicate that this betonite has a rapid adsorption rate for Cu2+, and needs a short time to reach the adsorption equilibrium.The unit mass adsorption amount increases with the increase of the temperature, initial Cu2+concentration and initial pH value in certain range.The fitting result between the test data and the relevant mathematical mode shows that the adsorption kinetics characters accord with the pseudo -second order kinetic equation, and the isothermal adsorption characters conform to Langmuir reaction isotherm.The thermodynamic parameter calculation results indicate that the adsorption process is a spontaneous endothermic process.
    Development & Application of Solidified Foam of Fly Ash for Mine Fire Control
    QIN Bo-Tao
    2008, 38(04):  139-141+148. 
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    In view of the defects existing in the present fire control technology for coal mines, a solidified foam of fly ash with a foaming expansion rate of 3~15 was developed based on the laboratory test by using self-developed compound additive and with fly coal ash as the main material.The solidified foam of fly ash was used to block the underground air leakage for controlling the coal seam spontaneous combustion at 1410 working face of Huafeng Coal Mine, and achieved very good effect.
    Investigation on Setting Up Reclamation Security Deposit for Mine Waste Land in Anshan
    ZHANG Chun-Xiu, WEI Zhong-Yi, SUO Bin
    2008, 38(04):  142-145. 
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    The paper outlines the fund shortage in the reclamation of Anshan iron mine waste land, presents the mine reclamation security deposit system that is adopted in USA and in Tianjin, China, and makes the suggestions on setting up the reclamation security deposit system for iron mine waste land in Anshan.
    Research on Preparation of Biological Ceramsite from Tungsten Tailing and Its Performance
    FENG Xiu-Juan, YU Yu-Xin
    2008, 38(04):  146-148. 
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    Test research on preparing porous biological ceramsite by roasting with tailings from Xialong Tungsten Mine in Dayu, Jiangxi as the raw material and furnace slag, coal ash and clay as auxiliary materials.The results indicate that when the volumetric ratio of tungsten tailing, slag, coal ash and clay is 4∶1.5∶1.5∶1 and the roasting temperature is 100 ℃, the biological ceramite prepared has a density of 1.61 g/cm3, bulk density of 1.10 g/cm3, specific surface area of 9.7 m2/g, acid soluble rate of 0.17%, alkaline soluble rate of 0.33%, and cylinder-mould strength of 8.1 MPa.When used to treat sewage with 817 mg/L CODCr, this biological ceramsite exhibited the advantages of rapid biofilm formation, large microbe attachment and easy backwashing, and reduced 20 d CODCr by more than 93%.
    Experiment Research on Impurity Removal from Acid Leaching Solution of AqueousLeaching Residue in Vanadium Extraction from Stone Coal
    LU Ji-Xia , ZHANG Yi-Min, LIU Tao, HUANG Jing
    2008, 38(04):  149-151. 
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    Dilute acid leaching of the aqueous leaching residue from the process of stone coal roasting-aqueous leaching-resin exchange-desorption-vanadium precipitation by ammonium salt-vanadium pentoxide making by calcination can improve the total vanadium leaching rate by more than ten percentage points.However, impurities such as silicon, aluminum, iron, and phosphorous can also enter the acid leaching solution with vanadium, thus affecting the downstream vanadium precipitation.For this, hydrogen peroxide and cupferron were used as screening agent and agent for removing impurities in the test of purifying this vanadium-containing acid leaching solution.The results indicate that when the hydrogen peroxide and the vanadium in the solution are in a mass ratio of fifteen, cupferron （1 g/L）and the acid leaching solution are in a volumetric ratio of 1∶8 and the pH of the solution is 6.5, a relatively thorough removal of harmful impurities can be realized, with the vanadium loss being only 15.52%,satisfying the requirement of the downstream vanadium extraction.