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Table of Content

    16 February 2009, Volume 39 Issue 02
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    A Technique for Detecting Concealed Deposits by Combining Geogas Particle Characteristics with Element Concentrations
    CAO Jian-Jin
    2009, 39(02):  1-4. 
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    A technique for detecting concealed deposits using not only element concentrations (comprehensive chemical composition data of whole sample analysis) but also geogas particle characteristics can provide more direct and abundant information about the concealed ore bodies.The technique proposed and studied by the author is a new prospecting method with the greater success rate and deeper probing depth.It can be used in quickly distinguishing the anomalies related to mineral deposits from those irrelative and predicting the deep-seated mineralization type and the scale and depth of concealed ore body.In addition to searching metal ores and oil-gas accumulations, it can also be used to forecast concealed fault structures.Its application will help speed up the resource exploration and development and eliminate the shortage of China's resources, thus brining good economic and social benefits.
    Discussion on the Dynamic Control of Stope Ground Pressure
    DIAO Xin-Hong
    2009, 39(02):  5-7+45. 
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    Key Laboratory of Road and Railway Engineering of Jiangxi Province, East China Jiaotong University The paper elaborates the causes for dynamic ground pressure of stope and the meaning of dynamic control of stope ground pressure, puts forward its contents, makes a deep discussion on its methods and presents the implementation procedure for the dynamic control of stop ground pressure.The ground pressure control methods and implementation procedure presented can have some guidance significance to the open-stope mining.
    Study on the Mineral Resource Acquisition with Compensation
    REN Hai-Bing, JI Chang-Sheng, WANG Xiao-Lin, LI Nai-Liang
    2009, 39(02):  8-12+22. 
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    In order to fully safeguard and realize the state ownership income from mineral resources, resolve the conflict and problems in the current system of acquiring the mineral resources with compensation, create a market environment with justice competition and fair distribution for mining enterprises and improve the mineral resource management level and efficiency, the paper, based on the analysis of the current compensation system for the use of mineral resource,  advances for the first time using the theory of acquiring the mineral resources with compensation to standardize and perfect the system of compensation for the use of mineral resource, and puts forward the concept of mineral product profit.It is considered that mineral resource ownership income, enterprise profit, various enterprise taxes and environment compensation cost are the four components of the profit of mineral products.As a result, the subjects entitled to the mineral product profit are clearly defined and differentiated, the state ownership income is specified and embodied, and the relationship between the ownership income and other incomes is made clear, thus clarifying and materializing the state ownership income of mineral resources.Preliminary study is also made on the contents and the determination method of the ownership income of mineral resources, proposing that the ownership income be decided according to the mineral resource rank.
    Application of Extenics Theory in Assessing the Mining Investment Environment in Foreign Countries
    ZHOU Kai-Feng, QIN De-Xian, JIANG Su-Mei, WU Wei, YANG Xiao-Kun
    2009, 39(02):  13-17+36. 
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    To reduce the risk of mining investment in foreign countries, based on matter-element model theory, extension set theory and dependent function calculation, an extension assessment model for the mining investment environment in foreign countries was established using matter-element analysis theory, converting the qualitative appraisal into a quantitative one.The assessment of the mining investment environment in Vietnam, Thailand, Laos and Burma surrounding Yunnan was made using this model, which indicates that the mining investment environment of these four countries are ranked in the order of “good, good, general and general” correspondingly.
    A Study of Mineral Resource Value
    YUAN Ying-Ju, CAI Qing-Xiang, ZHAO Chang, ZHANG Xiao-Fu, PENG Zhu
    2009, 39(02):  18-22. 
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    Based on Marx's differential land rent theory and labor value theory, it is concluded through analysis that the value of mineral resource is composed of exploration value, natural value and environment value, of which natural value comprises absolute value and relative value.On this basis, an assessment indicator system of mineral resource value is established and the calculation method for each assessment indicator is given.
    Theory and Application of the Depressurized Mining for Inclined Medium-thick Ore
    WANG Wen-Jie
    2009, 39(02):  23-26. 
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    In the underground metal mines, inclined medium thick ore bodies amount to 23% of the total orebodies being mined.With the mining going deeper, this ratio will further increase.The mining of this type of ore bodies is characterized by poor spatial moving conditions of caved ore.Once the development workings fails due to ground pressure, the ore may be lost permanently.With the increase in mining depth, the development workings for such type of orebody will face a greater risk of ground failure.To radically solve the instability of development workings, when the dip angle and thickness of a deposit are appropriate, the mining dynamic pressure in the development workings area can be timely released.Therefore, a theoretical method of depressurized mining for inclined medium-thick ore bodies was proposed and successfully tested and applied in Chambishi Copper Mine in Zambia, which achieved good technical and economic results.
    Mining Plan for Levels below -580 m in Huashupo Deposit in Dongguashan Copper Mine
    DUAN Zong-Yin, SHI Fa-Wu, ZHANG Liang-Gui
    2009, 39(02):  27-29+39. 
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    To ensure a sustained safe and efficient mining of the levels below -580m in Huashupo deposit, based on the analogy method and more than 40 years' successful experience in mining in Dongguashan old mine area, and in a comprehensive consideration of economy, systematicness, adaptability and suitability, a new mining process is chosen, which adopts medium or long hole blasting, track transportation, artificial pillar supported panel, and open-stop with delayed filling.
    Influence of Solidifying Additive on the Initial Fluidity and Strength of Solidified Tailings
    WANG Shun-Cai, ZHANG Chun-Lei, ZHU Wei, WANG Fang-Han, CAO Wei-Qin, MIAO Jian-Cheng
    2009, 39(02):  30-33+86. 
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    To better utilize the tailings to fill underground mined-out areas at a decreased filling cost, the influence of solidifying additive on the initial fluidity and strength of solidified tailing was studied for the tailings from Nanjing Yinmao Lead-zinc Mining Co.Ltd.The results show that the calcium lignosulphonate can improve the initial fluidity of solidified tailing while the bentonite can increase its strength.Under the prerequisite of satisfying the present filling process, raising the tailing concentration as much as possible by adding calcium lignosulphonate or bentonite can effectively reduce the cement consumption so as to decrease the filling cost.
    Simulation Study on the Stability of Roadway in Joint-Fissured Rock Mass
    YANG Wei-Feng, JI Yu-Bing, SHEN Ding-Yi
    2009, 39(02):  34-36. 
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    Analysis is made on the mine geological features of targeted area and it is found that the tectonic fissures and their development degree have a great impact on the roadway stability.Model test and numerical simulation are used in combination to study the effect of fissures on the deformation law of roadway wallrock in terms of fissure distribution characteristic, laying a foundation for a quantitative assessment of the deformation and stability of roadway in fissured rock mass.
    Mining Technology for Large Thick Broken Deep-Seated Orebodies
    CUI Hong-Liang, LIU Li-Hua, ZHANG Hai-Jun
    2009, 39(02):  37-39. 
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    With the mining going deeper, the mining environment will become increasingly worse.It has become urgent to study the mining technology for deep-lying mineral resource and the extraction of large thick broken deep-seated orebodies is now a worldwide challenge.Taking the 1# orebody in Jinchuan No.2 mining section as the case, the two-step stoping scheme with pillars and the continuous stoping scheme without pillars based on the downward mechanized cementing back-filling method are introduced.Their advantages and disadvantages are analyzed, which can be of great reference significance to similar mines.
    Study on the Mechanism of Perilous Rock Collapse from Cliff
    TANG Hong-Mei, CHEN Hong-Kai, WANG Lin-Feng, WANG Quan-Cai
    2009, 39(02):  40-45. 
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    The rock collapse from cliff generally follows the regularity of chain.The rock cavity formed due to different weathering is the starter of rock collapse.The perilous rock on cliff is mostly group of rocks and therefore, the interaction between them must be considered.The turning angle of rock block is used to measure the interaction between rock blocks.That is, we first calculate the turning angles of perilous rock blocks without considering their interaction and then calculate the real turning angles with consideration of their interaction by law of energy conservation.Based on this, a formula of equivalent bending moment by angle for each perilous rock is established.A formula for the collapse time of each perilous rock is also obtained based on the fracture mechanics and damage mechanics, verifying the law of chain perilous rock and providing a theoretical basis for the study of the formation of rock cliff and nearby landscape.
    Application Research of Neural Network Technique in Orebody Delineation
    WANG Xiao-Wan, YANG Hua
    2009, 39(02):  46-50. 
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    Orebody delineation is the basis for reserve calculation and mining design and also an important basis for an accurate description of orebody spatial distribution pattern, law of valuable mineral change and ore reserve distribution.In view of the defects in conventional orebody delineation methods such as strong subjectivity and low efficiency, the automatic delineation of ore-rock boundary based on the artificial neural network technique was proposed.Its practical application has verified that the method can greatly improve the efficiency of orebody delineation and well solve the problems existing in other available methods, with the accuracy remarkably better than that of conventional methods.
    Application of Non-pillar Sublevel Caving Method in Pillar Recovery
    KE Bo, LI Ping
    2009, 39(02):  51-52+74. 
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    In view of the fact that a great number of pillars were remained at 1158m sub-level in the west mine section of Rongguan Mining's multi-metal mine and also of the transition due to the mining method change in the late period, based on a careful analysis of the geological features, recovery plan, blasting parameters, blasting plan and construction plan, a rational plan was worked out for the pillar recovery, thus creating favorable conditions for the mining below 1158 sublevel by non-pillar sublevel caving.
    Research and Application of the Large Strain Consolidation of Saturated Fine-Grained Tailings in Tailings Reservoir
    WU Xiao-Gang, WANG Bin, XIANG Hong-Hai, ZHOU Yu-Xin
    2009, 39(02):  53-56. 
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    Based on the Gibson's nonlinear large strain consolidation theory, the secular equation of the large strain consolidation under the Lagrange coordinate system was formulated.Based on the series consolidation tests of the saturated fine tailings carried out in a research project of tailing dam construction with fine tailings in a copper mine in East China, the evolutionary process of the consolidation degree under the influence of deadweight and time factors, and the relationship of the consolidation degree with the granulometric composition and sub-layer thickness were analyzed.A comparison between the theoretical calculation result and the centrifuge test result was made, illustrating the applicability of large strain consolidation theory in the research of consolidation deformation of fine tailings.The research result has been used in a real case.
    Experimental Study of the Seepage Dynamics in Heap Leaching Process
    LIU Jin-Zhi, WU Ai-Xiang, WANG Yi-Ming
    2009, 39(02):  57-59+146. 
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    Blockage often occurs in heap leaching, causing a continuous change in porosity and making the seepage coefficient no longer constant.In view of this, mechanical block was modeled with acid leaching of mixed ores and chemical block with bacterial leaching of sulfide ore.The seepage velocity and pressure of each leaching column were monitored periodically and the regression analysis was conducted on the regularity of seepage coefficient's change with leaching duration by Markov software.The results indicate that chemical blockage can have a greater impact on the seepage than mechanical block.
    Application of Enhanced Neural Network in the Synthesized Deformation Prediction of Foundation Pit
    ZHENG Chong-Qi, WANG Xian-Cheng, FENG Bao-Min
    2009, 39(02):  60-62+78. 
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    In order to effectively improve the deficiency of conventional artificial neural network's algorithm and precisely predict the deformation of foundation pit, this paper establishes a model exemplified by actual projects for neural network by adopting an enhanced artificial neural network.Furthermore, taking actual deformation data of constructed foundation pit with the same or similar conditions as learning sample, and actual deformation measurements as desired output, the neural network is trained.The results obtained show that the output of this training method for neural network is relatively reliable and close to reality.Therefore, such a training method is very effective for predicting the deformation of foundation pit and can be used as a source of reference for other projects of foundation pit.
    Study on the Shear Resistance Characteristics of Floor Anchor
    ZENG Kai-Hua, WANG Chun-Guang, WANG Gui-Lian, YANG Sheng-Bin
    2009, 39(02):  63-66. 
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    Onsite engineering tests show that the anchor fixed into the floor at a base angle can effectively control the deformation of roadway floor.The shear experiment of different types of anchor rods was carried out.The result shows that a seamless rock has a higher shearing resistance than a tube seam rod and different rod- filling materials may have a great impact on the rod shear resistance.The steel-reinforced rod has the highest shear resistance, the grouted rod has the secondary, and the hollow rod the least.The steel reinforcement of rod can not only improve the rod body strength but also render the rod the capacity of enduring a secondary load by the duplex load peak characteristics occurring under the shearing process and a larger deformation range.This study result can be instructive to the study of mechanical characteristic of anchor|floor heave control|and parameter design optimization.
    Study on the Beneficiation Technology of a Refractory Limonite Ore of Guizhou
    DENG Qiang, CHEN Wen-Xiang, YU Hong-Lin, DI Yong-Lin
    2009, 39(02):  67-70+74. 
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    An iron ore of Guizhou contains iron minerals which are mainly limonite and pyrite and gangue minerals that are mainly aluminosilicates such as clay and chlorite.The ore is characterized by fine dissemination size of iron minerals, complex intergrowth and being easy to slime in grinding, belonging to refractory iron ores.Beneficiation tests were made on the processes of gravity separation, high intensity magnetic separation (HIMS), and HIMS -reverse flotation, which all achieved a very low grade and recovery of iron concentrate.Based on the orthogonal conditional optimization tests of magnetized roasting-LIMS, a process consisting magnetized roasting, grinding-classification, LIMS of fine particles and regrinding- LIMS of coarse particles was adopted, producing  an iron concentrate assaying Fe 61.22% at a Fe recovery of 77.82%.This study has laid a foundation for the exploitation and utilization of this iron ore of Guizhou and can also be used as reference to the exploitation and utilization of other similar iron deposits.
    Influence of Roasting on the Dephosphorization of Svanbergite  High-Phosphorus Iron Ore by Acid Leaching
    ZHANG Shao-Hua, LIU Qing, XIE Bing
    2009, 39(02):  71-74. 
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    The influence of roasting on the acid leaching-dephosphorization of svanbergite high phosphorous iron ore represented by that from Henan and its mechanism are studied.The result shows that roasting is of great importance to the acid leaching-dephosphorization of this kind of ore.The hard acid-soluble svanbergite will gradually decompose into hexagonal AlPO4 which is acid-soluble at a roasting temperature of 500~700 ℃, thus greatly improving the dephosphorization effect of acid leaching.However, when the roasting temperature rises to over 1 025 ℃， the AlPO4 crystals will change from hexagonal to cristobalite that is hard to solve in acid, leading to the decrease of dephosphorization.For this test sample, it is best to have a roasting temperature of 800 ℃, which is kept for one hour.
    A Flotation Process for a Sulfide-Oxidized Cu-Co Mixed Ore
    欧Le-Ming , YIN Bing-Yi, FENG Qi-Ming, LU Yi-Ping, ZHANG Guo-Fan
    2009, 39(02):  75-78. 
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    A sulfide-oxidized Cu-Co mixed ore has a high oxidation ratio and contains a large amount of carbonaceous mud and a good comprehensive recovery can't be achieved when it is treated by conventional flotation methods.Pr-desliming by flotation was therefore adopted first to eliminate the influence of carbonaceous mud on the flotation process and then asynchronous flotation was used to treat Cu-Co sulfide ore and oxidized Cu-Co ore.Sulfidizing agent was used to enhance the flotation of oxidized Cu-Co ore.As a result, a Cu-Co concentrate assaying Cu 21.2% at a recovery of as high as 88.55% and Co 0.116% at a recovery of 31.39%was produced from a feed ore containing Cu 2.63%, Co 0.04% and C 6.63%.It is also found that sodium hydrosulfide (NaHS) is more beneficial than sodium sulfide(Na2S) when used as a sulfidizing agent to activate the oxidized Cu-Co ore in flotation.
    Collecting Performance of N-Lauryl-1,3-Diaminopropane
    LIU Wen-Gang, WEI De-Zhou, WANG Xiao-Hui, CUI Bao-Yu, WANG Ben-Ying, FANG Ping
    2009, 39(02):  79-81+86. 
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    Collecting performances of N-lauryl-1, 3-diaminopropane (ND13) for quartz, hematite, calcspar, calamine and magnesite are investigated and compared with those of laurylamine by flotation experiments.The result shows that it has a stronger collecting performance for quartz than laurylamine does.The recovery of quartz is more than 90% in a wide pH range and can be as high as 98.38% at pH=10.02.The collecting performance of ND 13 for hematite is little different from, but for calcite, evidently poorer than that of laurylamine.It has basically no collecting capacity for calamine and magnesite.The calculation of group electronegativity shows that ND13 has a better selectivity than laurylamine does.
    Study on the Fluidizing Reduction of Manganese Dioxide Ore
    ZHANG Han-Quan, DING Chang-Gui, ZHAO Lei
    2009, 39(02):  82-86. 
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    In view of the problems in the conventional processes for the reduction of manganese oxide ores such as low efficiency, high energy consumption, poor operation conditions and serious environment pollution, based on the high mass heat transfer principle of gas-solid fluidization, the fluidizing rapid reduction technology was adopted in the reduction roasting of manganese oxide ore.The manganese minerals in Guangxi Daxin manganese ore occurs mainly in pyrolusite (β-MnO2) and vernadite (MnO（OH)2).Fluidizing state characterized by high gas-solid heat transfer and large contact area was used to enhance the reduction roasting of manganese oxide ore.At a temperature of 750～850℃ and a CO content of 3%~6%, a conversion rate of greater than 90% was achieved at a roasting period of only 10~60s, demonstrating the scientific assumption that a rapid fluidized reduction roasting of manganese oxide ore can be made in only several ten seconds.It will promote the industrialized exploitation and utilization of low grade manganese ore resource.
    Research on the Flotation Process for Finely Disseminated Fluorite Ore from Inner Mongolia
    GAO Hui-Min, LENG Yang, XU Hong-Feng, JING Zheng-Qiang, MAO Yi-Lin
    2009, 39(02):  87-90+104. 
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    A rational reagent regime and process for a finely disseminated fluorite ore from Inner Mongolia were determined through flotation test research.The flotation test adpoted the self-developed modified fatty acid salt YSB-2 as collector and was carried out at a normal temperature (24 ℃).The process was composed of one rougher in weakly alkaline medium（pH=9.0）and seven cleaners in weakly acidic medium (pH=6.0).The tail of cleaner I was the final tail and the middlings were concentrated and returned to the acidic-alkaline process.A high grade fluorite concentrate assaying CaF2 98.70% at a CaF2 recovery of 89.20%, SiO2 0.93% and CaCO3 below 0.37% was produced.
    Effect of Grinding Medium on the Flotation of Calcite with Lauryl Amine
    SONG Zhen-Guo, SUN Chuan-Yao
    2009, 39(02):  91-93+97. 
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    The effect of two grinding media, namely steel ball and zirconia ball, on the calcite surface properties and the calcite recovery in the flotation using lauryl amine was studied.The flotation result shows that in lauryl amine flotation system, the flotation recovery of grounded calcite product is higher in case of zirconia balls used for grinding than that in case of steel balls.The solution testing and surface analysis indicate that iron ions will be produced in the grinding process when steel balls used as the grinding medium, which will be further oxidized and adsorbed on calcite surface, reducing the electronegativity of calcite surface to effect a depression of calcite.
    Effect of Acidified Sodium Silicate on the Floatation of Molybdenite
    YUAN Zhi-Tao, ZHAO Li-Bing, WANG Ze-Hong, HAN Yue-Xin, CHENG Shao-Yi
    2009, 39(02):  94-97. 
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    Sodium silicate is generally used as depressant of silicate mineral in the floatation of molybdenite.Acidified sodium silicate was used in the laboratory flotation test of Xinhua molybdenum and the test result shows that acid sodium silicate can reduce the dosage of other reagents in flotation while improving the flotation performance.In the open-circuit test of a process composed of one rougher, one scavenger and four cleaners using acidified sodium silicate, a final concentrate assaying 41.83% at a Mo recovery of 36.37% and tails grading 0.030% at a Mo recovery of 12.50% were produced, a 16.80 percentage-point increase in concentrate grade and a 1.5 percentage-point decrease in Mo loss in tails compared with the results achieved in the test with non-acidified sodium silicate.
    Progress in the Pretreatment Technology for Arsenic Removal from High Arsenic Gold Ore
    ZHOU Yuan, TIAN Shu-Guo, LIU Liang
    2009, 39(02):  98-101. 
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    The paper presents the progress in the pretreatment technology for arsenic removal from high arsenic gold ores such as oxidation-roasting pretreatment, wet chemical pretreatment and bacterial oxidation pretreatment.It is pointed out that pressurized oxidation, chlorination, bacterial oxidation and combined processes are the important development orientation for the pretreatment technology for arsenic removal from high arsenic gold ores.
    Rapid Determination of SiO2 in Iron Ore
    CHEN Ping, 吕Xian-Jun , SUN Li-Jun
    2009, 39(02):  102-104. 
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    The iron ore sample is decomposed with NaOH+Na2O2 flux and the melt is digested with dilute hydrochloric acid to convert the SiO2 into soluble silicic acid.Then the silicon dioxide content in the sample is determined by molybdenum-blue spectrophotometry.The method that is simple, accurate and reliable enables a rapid macroanalysis of silicon dioxide, well meeting the control requirement of iron ore beneficiation.
    Characteristics and Indication Significance of the Secondary Halo in Dehelongwa Cu-Au Deposit in Qinghai
    XIAO Xiao, TANG Jing-Tian, XI Chao-Zhuang, WANG Ye, ZHANG Ji-Feng, DU Hua-Kun
    2009, 39(02):  105-109+117. 
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    The paper describes the regional geology and geochemistry of the Dehelongwa Cu-Au deposit and analyzes the ore-forming conditions.Comprehensive anomalies of elements such as Au, Cu, Ag, Pb and Zn were discovered in a 1/5,000 secondary halo reconnaissance.The secondary halo abnormities reflect the existence of Cu-Au mineralization, and Au, Cu, Ag, Pb and Zn are the important indicator elements .The abnormities are closely related with the mineralization forms and occurrences controlled by the faulted structures, further illustrating  that the copper-gold ore in this area is mainly fault-controlled.
    Shaft Deformation Forecast and Control
    LUAN Yuan-Zhong, LI Jing-Tao
    2009, 39(02):  110-111+130. 
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    No.1 shaft in a Shandong gold mine was deformed, distorted, cracked and damaged due to the private mining in recent years.To ensure the safty production of the mine, forecast was made of the subsidence and strentching and compressive deformation of the shaft.Control measures were taken according to the forecast deformation value such as blasting unloading and pre-stressed anchor cable reinforcement.The observation of the shaft distortion by inverted plumbline method shows that the control measures have achieved a very good effect.
    Application Practice of 3D Laser Monitoring Technology in Finished Stope Survey
    XIA Yong-Hua, FANG Yuan-Min, SUN Hong-Sheng, WA Xue-Kun, CHEN Jie, GU De-Mao
    2009, 39(02):  112-113+127. 
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    Mined area can severely affect the mine's follow-up production planning.Based on the practice of applying 3D laser monitoring technology (CMS) to collect the underground 3D data in Dahongshan Copper Mine, a detailed introduction is made of the 3D cavity data collection method, data pre-treatment and application practice of CMS technology.This technology adopts a contactless survey method.It can not only obtain the accurate spatial parameters of finished stopes such as length, area, volume, deformation of wall rock and roof and their change relation but also greatly improve the safety and efficiency of cavity data collection, providing the data for cavity safety evaluation and control and the design of ore-pillar extraction.
    Design and Realization of the Urban Engineering Geological Information System Based on MapX
    CHEN Zhu-An, ZHANG Li-Ting, LUO Yi-Yong
    2009, 39(02):  114-117. 
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    To develop software of engineering geological information system by adopting the component-based GIS developing technology in combination with the characteristics of engineering geological information can well make up the deficiency of the current engineering geological management system in geographic information management, enhance the spatial attribute management and analysis and meanwhile, greatly shorten the system development speed.Based on this, the application of MapX5.0 in the urban engineering geological information system was investigated, the system development platform was chosen, the system modules, system functions and system database were designed, and the system functional modules were finally realized, achieving the expected design objective.
    A New Type of Network Interconnection of Mine Safety Monitoring System
    DENG Ming, ZHANG Guo-Shu, CHEN Yun
    2009, 39(02):  118-120. 
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    In light of the current monitoring technology used in the coal mines in China, the paper presents a technology of interconnecting a wireless sensor network (WSN) into the coal mine safety monitoring system.A system model for interconnecting the WSN into the existing monitoring system and the software and hardware of the relevant access gateway are designed and realized.The access gateway is mainly composed of single-chip microprocessor ATmega128L and smart RF chip CC2420 and the control module is communicated with the industrial computer via an interface-chip MAX485.The system meets the needs of mine safety monitoring and is characterized by easy installation, high sensitivity and good stability.
    Application of Data Warehouse and Data Mining Technology in Mining Enterprise Informatization
    LIU Xin-Liang, JIANG Tong-Qiang, ZUO Min, HAN Zhong-Ming
    2009, 39(02):  121-123+127. 
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    Data warehouse and data mining is an information technology.However, it is a quite new subject for mining enterprises to adopt the data warehouse and data mining technology.The paper presents its basic theory and introduces the specific procedure and strategy for mining enterprise informatization and the application of data mining technology in mining informatization, which can well solve the issue of mining information re-use.
    GIS-based Mineral Resource Management Information System
    CHEN Qi-Liang, ZHU Jie-Yong, ZHU Lin-Sheng, ZHU Ai-Ming, SHI Quan
    2009, 39(02):  124-127. 
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    In view of the problems presently existing in the conventional management of mineral resources, a GIS-based mineral resource management information system is proposed.The system is designed and implemented based on the technologies of geographic information systems, database, software engineering principles and secondary development.This system provides a modern scientific management and decision-making tool to the mineral resource management.The system requirements, overall design, function design and database building are described in detail.
    Hardware Design of Monitoring Circuit for Shearer Attitude
    AN Mei-Zhen, PAN Hong-Wei
    2009, 39(02):  128-130. 
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    Hardware monitoring of shearer attitude is realized based on the low-power MSP430149 single chip.Single/dual-axis accelerometer ADXL103/203 is used for the monitoring, TMP05 temperature sensor is used for the temperature compensation to the initial measuring result of the accelerometer and the corrected result which is the final output of the monitoring circuit is transmitted and displayed via single chip 485 bus to facilitate the interaction of human-machine interface.As a result, the temperature drift effect due to underground adverse working environment is reduced, improving the accuracy and reliability of the measuring result.
    Study on the Application of 3D Laser Scanning Technology in Landslide Monitoring
    LIU Wen-Long, ZHAO Xiao-Ping
    2009, 39(02):  131-133. 
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    The basic principle and key technique of 3D laser scanning are described.The landslide monitoring data were obtained by using the three-dimensional laser scanning technology.Technical means such as deep image segmentation, point cloud data matching and point cloud filtering were adopted in the relative and absolute positioning and splicing of single station scanning data.The landslide DEM model was finally established, which is a beneficial trial in 3D monitoring and alarming of landslide.
    Test and Application of Sawtooth Wave Jigger for Recovering Fine Cassiterite
    YE Xue-Jun, 吕Bing-Jun , FENG Zhang-Fa, CHEN Jin-Quan
    2009, 39(02):  134-136+150. 
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    A mineral processing plant adopted a beneficiation process of gravity separation-flotation- gravity separation.Its gravity separation for pretreatment using a combination of φ2000 mm spiral sluice and spiral classifier to discard tailings had a very low tailing discard rate and the tailing of the spiral sluice had a high tin content, leading to a great loss of tin metal.Therefore, it was proposed to use a sawtooth wave jigger to replace the spiral sluice for treating the circulating load of duplex spiral classifier.The laboratory test produced a jigger tailing containing 0.08% Sn, 0.07% Pb and 0.38% Zn, with the tailing discard rate reaching 55.52%.The metal recoveries of the jigger concentrate were 90.67% Sn, 86.50% Pb and 89.26% Zn.The industrial test achieved metal recoveries of 91.22% Sn, 87.10% Pb and 80.35% Zn from a feed assaying 0.61% Sn at a tailing discard rate of 54.13%.When the feed contained 0.81% Sn, the metal recoveries were 95.45%Sn, 91.12% Pb and 88.79% at a tailing discard rate of 43.51%.
    Application of Centrifugal Separator in Fine Tungsten Slime Recovery
    LIN Pei-Ji
    2009, 39(02):  137-140. 
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    The paper presents the features of the process for recovering fine Tungsten slime in Tieshanlong Tungsten Mine.Based on the existing problems analasized and improved of the production process and management of centrifugal separation, the centrifugal separation process for fine tungsten slime has gained a ripe application in Tieshanlong Tungsten Mine, which is of reference significance to the popularization of centrifugal separators for improving the tungsten recovery in wolframite mines.
    Application of DLP Projection Technology in Mine Video Monitoring System
    WU Jin-Chun, DING Meng-Jun, HU Ping, ZENG Yun-南
    2009, 39(02):  141-143+150. 
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    With the technical development and display demand, large-screen projection technology is gaining a wider application in monitoring systems.The paper presents the development of large-screen projection technology in China, highlights the working principle and technical features of DLP projection technology and describes its practical application in mine video monitoring system, which is exemplified by the case in Sinosteel Shandong Mining CO., Ltd.
    Target System for the Environmental Impact Assessment of Mineral Resource Planning of Sichuan Province
    YANG Yuan-Yuan, WANG Qing
    2009, 39(02):  144-146. 
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    Based on the typical mining site survey and the classification statistics of environment problems of Sichuan Province, a correlation between the environment problems and ore types under exploitation is established and a system identification of the degree of environment impact of mineral resource development is made.In view of the natural environment background and existing mining environment problems in Sichuan Province, a target system framework for the environmental impact assessment of mineral resource planning of Sichuan Province is established.A quantitative study is made on the indexes and factors by a hierarchical entropy multi-objective decision analysis model.As a result, the degree of environmental impact when the mineral resource planning is completed is well reflected, providing a basis for controlling the quality of mining area environment and being of reference significance to the further improvement of the environmental impact assessment of mineral resource planning.
    Theory and Practice of the “Forest-Like” Mine Construction in WuSteel Mining Co
    YIN Xiao-Peng, LI Ke-Shun, LI Hai-Bo
    2009, 39(02):  147-150. 
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    In implementing the spirit and scientific development concept of 17th CPC National Congress, WuSteel Mining Co.was the first in China to put forward the slogan of building a forest-like mine, summarized its important significance and formulated its index system.It stresses on a land reclamation rate of over 35% for the recent period and of over 60% for a long run, a forest coverage of the mining area of over 40% and a plant survival rate of over 90%, which have been gradually popularized and stepwise implemented.The company has won titles of “Asian Largest Manual Hard-rock Dump Reclamation Base” represented by Daye Iron Mine and “National Advanced Greening Collective”, setting up a good example for the construction and development of mine enterprises in China.
    Mechanism and Forecast of the Ground Subsidence in Daxin Lead-Zinc Mine in Guangxi
    TANG Ming-Fu, ZHOU Ming-Fang, LI Fu-Ping, LI Yi, YAO Bai-Hua
    2009, 39(02):  151-153. 
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    Ground subsidence is a geological disaster due to various complex causes.Underground mining is one of the causes and the process of ground subsidence caused by underground mining is a complex systematical issue.In view of the real ground subsidence conditions at Daxing Lead-zinc Mine in Guangxi, the research and forecast of ground subsidence mechanism was carried out by means of site investigation, surface displacement monitoring and grey model.It is of important practical significance to the study of the ground subsidence development trend caused by metal mine production and to avoiding its danger.
    An Investigation of the Treatment of Wastewater Containing  Cu, Zn and Cd Heavy Metals by Ferrite Process
    LU Dong-Liang, XIA Lu, WEN Bao-Lin
    2009, 39(02):  154-156+167. 
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    The wastewater containing copper, zinc and cadmium ions was treated by ferrite process.The main technical parameters of the process were discussed and the effect of pH, temperature, Fe3+ and Fe2+ dosage and additive on the treatment result was investigated.The experiment shows that the optimum treatment conditions include a temperature of 70 ℃, addition ratios of Fe3+/Fe2+ and Fe2+/Mn2+ of 1.5 and 10mg/mg, respectively, pH value of 9 and additive dosage of 1.2 g/L, enabling the wastewater containing copper, zinc and cadmium irons to reach the requirements for discharge after the treatment.
    Preparation of CPC Modified Bentonite and Its adsorption for 2,4-Dichlorophenol
    ZHANG Feng-Jie, MA Kun, WU Yun-Na, XIE Di
    2009, 39(02):  157-159+162. 
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    Crude bentonite was modified using cationic surfactant CPC (cetyl pyridinium chloride).The CPC modified bentonite was characterized by IR and XRD and used as adsorbent to study its removal of 2,4-Dichlorophenol from waste water.The optimum conditions such as adsorption time, temperature, amount of adsorbent and pH value were also determined.The study shows that CPC modified bentonite has both surface adsorption and distribution effect of 2,4-dichlorophenol , leading to an evident removal of phenol pollutants.
    Analysis of the Forms of Heavy Metals in the Soil Downstream of a Uranium Mine's Tailing Dam
    HU Rui-Xia, GAO Bai, SUN Zhan-Xue, FENG Ji-Guang, MENG Yi
    2009, 39(02):  160-162. 
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    Heavy metal pollution of soil is one of the major environment issues.The study of the form of heavy metals in soil can provide a reliable base for a scientific restoration of the soil polluted by uranium mines and lay a foundation for the control and management of soil pollutants.Four surface soil samples were taken from the area downstream of the tailing dam of a uranium mine and the chemical form distribution of the heavy metals in the soil such as Cd, Pb, Zn and radioactive U was studied.The result indicates that the Cd in the soil occurs mainly in exchangeable phase and carbonate phase that have strong biological activity and migration.Pb and Zn occur mainly in residual phase that has a poor bioavailability.U occurs mainly in association with Fe-Mn oxidation phase that has certain potential harzard to the ecosystem.
    Greenness Evaluation of the Process for Treating High Titanium Slags by Microwave Irradiation
    CHEN Guo, CHEN Jin, PENG Jin-Hui, GUO Sheng-Hui, LI Jun
    2009, 39(02):  163-167. 
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    The fuzzy comprehensive evaluation indexes, evaluation system and mathematical model for the greenness of the process for treating high titanium slags were established, involving resource consumption, environmental impact, cost, time and quality.The fuzzy comprehensive evaluation of the greenness of the process for treating high titanium slags by microwave irradiation was made through test examples and it was compared with the greenness of the conventional method.The result shows that the greenness of the microwave method is far better than that of conventional method and the microwave processing method meets with the development trend of green manufacture
    Adsorption of D261 Macroporous Resin for Cyanide
    HE Min, LAN Xin-Zhe, ZHU Guo-Cai
    2009, 39(02):  168-170+177. 
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    D261 macroporous adsorption resin is screened out with the cyanide absorption rate as the index.The effect of solution flowrate and concentration on the cyanide adsorption of D26 resin is investigated, the stripping conditions are determined and the adsorption mechanism is preliminarily explored by infra-red spectrometry.The results show that D261 macroporous adsorption resin can effectively adsorb simple cyanide and its dynamic saturated adsorption capacity is 26.64 mg/mL wet resin.The adsorption rate can be over 99% when a neutral strippant is used.D261 macroporous adsorption resin has the advantages of large adsorption capacity, high stripping rate, simple operation and no potential pollution and therefore, has good industrial application prospect for recovering cyanide.
    Tailings Resources Recycling and Its Legal System Construction
    ZHAO Mei-Zhen, LIU Wei-Ping
    2009, 39(02):  171-173+185. 
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    The paper describes various kinds of ways of and the problems in tailings resources recycling and points out that the recycling of mine tailing resource must adopt a recycle economic mode both technically and from legal system, analyzes the status quo and problems of the legal system concerning the tailing resource recycling and discusses the ecology, compatibility and sustainability of the relevant legal system.On this basis, it is pointed out that for an efficient exploitation of tailing resource, in addition to technical innovation, it is of great importance to establish a legal system of tailing resource recycling based on the Law of Tailing Resource Recycling so as to promote the exploitation and utilization of tailing resource by means of administrative enforcement of law and juridical enforcement.
    Study on Making Flotation Tailings of Bauxite Flame-retardant
    LU Qing-Hua, HU Yue-Hua
    2009, 39(02):  174-177. 
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    The tailing coated with antimony oxychloride that is flame retardant was produced by hydrolysis using the flotation tailings of bauxite from Xiaoguan, Zhengzhou, Henan.The characterization and flame retardancy performance of the coated tailing were made by means of scanning electronic microscopy (SEM), transmission electron microscopy (TEM) and X-ray diffraction (XRD), thermogravimetric analysis (DSC-TG),limiting oxygen index（LOI）and cone calorimeter（CONE）.The results show that the coated tailing has rough surface and non-uniform coating thickness; the coating phase is mainly composed of SbOCl and also some Sb4O5Cl2; the coated tailing will be thermal-decomposed at a temperature greater than 200 ℃ and has a better flame retardancy performance than SbOCl produced at the equivalent conditions when used for polyethylene flame retarding; and it also has a smoke suppression performance.
    Preparation of Sintered Porous Decorative Bricks with Coal Gangue
    SUN Xiao-Gang, XING Jun, QIU Jing-Ping, WANG Qing, NIU Lei-Lei, XU Shi-Da
    2009, 39(02):  178-180+185. 
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    Multi-colored sintered porous decorative bricks were produced at different calcination temperatures by integral tinting and one-step forming using the coal gangue from Liaoning Chaoyang Hualong Group as raw material and industrial colorants of iron red, iron yellow and chromium green and low grade braunite for tinting.The bricks thus made have compression strength higher than 67 MPa and fine colors.A new way has thus been explored for the comprehensive utilization of coal gangue.
    Study on the Composition Characteristics of Slag from Desulphurization and Slag Skimming in AnSteel
    WANG Li-Ying, HAN Yue-Xin, REN Fei, LI Li-Xia, ZHAO Chang-Ying
    2009, 39(02):  181-185. 
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    The composition characteristics of slag from desulphurization and slag skimming in AnSteel represented by Angang Group's First Steel Works was studied by size composition analysis, chemical analysis, XRD, SEM and iron phase analysis.The study result indicates that this slag's main valuable element is iron, whose content is as high as 54.18%, and its main harmful element is sulfur, whose content is 1.01%.Its main phases include metal iron, magnetite, ferrites, silicates and aluminates.The iron occurring in metal iron and magnetite amounts to 61.88% of the total iron and the sulfur mainly occurs in calcium sulfide and sulfate minerals.The iron is mainly distributed in coarse fractions while the sulfur in both coarse and fine fractions.