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Table of Content

    15 March 2010, Volume 39 Issue 3
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    New Progress on Comprehensive Utilization and Emission Reduction of Mine Tailings
    CHANG Qian-Fa
    2010, 39(3):  1-5. 
    Asbtract ( 1663 )  
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    The status of China's mine tailings and its hazard are summarized, the difficulties and problems in comprehensive utilization of tailings and emissions reduction are analyzed, and seven approaches and new progress on the comprehensive utilization and emissions reduction of tailings are introduced, thus putting forward the corresponding measures and recommendation.
    Final—Pit Optimization for Jiajiapu Iron Mine
    GU Xiao-Wei, GE Shu, FAN Li-Jun, WANG Qing, ZHANG Bin
    2010, 39(3):  6-8+39. 
    Asbtract ( 1916 )  
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    In the design of the final pit for Jiajiapu mine of Benxi Iron and Steel Company, a software package, SmartMiner, was used to optimize the final-pit and to conduct pit-limit analyses. This case study indicates that application of optimization can play an important role in obtaining the best finalpit design, and the pit has a high sensitivity with respect to economical conditions (product price in particular）when the objective is to maximize the total economic gain. Pit-limit analysis is also a valuable procedure in determining the phase pit limits.
    Optimization Research of Accumulated Bauxite Ore Blending in Yard Based on Xpress-MP
    YANG Shan, CHEN Jian-Hong, YANG Hai-Yang, LIU Ji, YONG Xue-Yan
    2010, 39(3):  9-11. 
    Asbtract ( 1991 )  
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    According to the characteristics of the accumulated bauxite and the demands of production technology, the mathematical model for non-quantitative and quantitative ore blending in yard was constructed. After calculation by optimizing simulation software Xpress-MP with operation research, the optimal scheme of ore blending was determined. The mathematical model is of great importance to keep the sustainable utilization of the bauxite resources, instruct the production and operation of the mines and improve the economic benefit of enterprises.
    Particle Flow Numeral Simulation Investigation on Influence of  Lateral Opening Angle on Ore Drawing With Sublevel Pillarless Caving
    WANG Pei-Tao, YANG Tian-Hong, LIU Xiao-Bo
    2010, 39(3):  12-16. 
    Asbtract ( 1942 )  
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    With sublevel caving as the research object, the paper studied the laws in the ore drawing process with the changes of the lateral opening angle. Based on PFC2D, the movement of particles and the pressure field, especially lateral pressure of the funnel are all simulated and analyzed. As is shown, the lateral pressure rises with the increase of the angle of the lateral opening; the limit equilibrium cove forms and disintegrates much more frequently when the angel of lateral opening is lower.
    Selection and Optimization of Activators for Cementitious Materials Filled with Yellow Phosphorus Slag
    LIAO Guo-Yan, LI Xi-Bing, ZHAO Guo-Yan
    2010, 39(3):  17-19+99. 
    Asbtract ( 2185 )  
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    According to the physical, chemical and thermodynamic characteristics of yellow phosphorus slag as well as its activity principle, based on a large number of indoor tests and the compressive strength of fill in different period, the influences of types of alkali activator, dosage of alkali on compressive strength of cementitious materials filled with yellow phosphorus slag and its hydration reaction mechanism are analyzed. The results show that the yellow phosphorus slag is improved under NaOH and CaO activators, and the best dosage of that two alkalis are 5% and 8% respectively. The hydration product of yellow phosphorus slag includes C-S-H, in addition, the sulfate of the phosphogypsum also played a certain role in stimulating.
    A New Method of Fan-shaped Deep Hole Blasting Self-cutting With No Cutting Raise
    MING Shi-Xiang, YUAN Meng, LU Bing-Qiang
    2010, 39(3):  20-33+93. 
    Asbtract ( 2103 )  
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    Cutting groove is one of the important processes of the pillarless sublevel caving method. The quality of the broached groove greatly influences the effect of blasting and mining, but because of the poor construction security in the mining area with soft and breaking orebody, cutting groove is difficult and its quality is hard to be ensured. The fan-shaped deep-hole blasting self-cutting with no cutting raise is a safe, simple and dependable cutting method which has a broad promotion and application value.
    Depressurized Support Method and Application in the Development Working of High Stress Area
    WANG Wen-Jie
    2010, 39(3):  23-25+144. 
    Asbtract ( 1912 )  
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    With the underground mining depth increased, the development working failure is more and more serious because of high ground pressure. It is of significance to keep those development workings stable. Based on the theoretical analysis and the tests, the depressurized support can be adopted to keep the development stability in the high stress area or some area that are seriously affected by mining stress. In this way, the high stress can be released by depressurized mining. Based on the stress reduced degree, the suitable support form and parameters can be chosen so as to keep the development working stable by depressurizing the support. And the industrial application results show that the depressurized support technology can effectively control the deformation of surrounding rocks in tunnel and keep the tunnel stable.
    Study on Sedimentation Rules of Full Tailings in Beneficiation of Nanjing Lead-Zinc-Silver Mine
    ZHANG Chun-Lei, WANG Shun-Cai, WANG Fang-Han, MIAO Jian-Cheng, CAO Wei-Qin
    2010, 39(3):  26-28+85. 
    Asbtract ( 1736 )  
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    The sedimentation properties of full tailing was studied by sedimentation column test, and test results showed that the sedimentation procedure can be easily divided into self-weight sedimentation phase and self-weight consolidation phase by loglog coordination of sedimentation velocity and time. The self-weight sedimentation phase takes about 3 h. The density and concentration increase with sedimentation time increase. Within the first hour, the sedimentation is slow, while between one hour and four hours, the tailing sedimentation varies fast. After 24 h, each index in the sedimentation procedure comes to be steady. With the depth increase, the density and concentration increase as well. 
    Stability Analysis on Temporarily Horizontal Ore Pillar under Complicated Geological Conditions
    JIANG Wen-Wu, XU Guo-Yuan
    2010, 39(3):  29-31+65. 
    Asbtract ( 1798 )  
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    For the reality of multi-level mining in Jinchuan No.2 mine under the complicated geological and mining conditions, three-dimensional finite difference code, the mechanism, on which temporary pillar support controlled redistribution of the ground pressure and convergence displacement in mined-out structure, was found, and the change in distribution of the pillar's stress and deformation was obtained as the horizontal pillar was thinned and disappeared due mining in sublevel downwards. The results showed that at the beginning of pillar formation, it played important role in controlling the convergence between the hanging wall and footwall surrounding rock of mined-out range, but obvious stress concentration occurred in the conjunction of the pillar and surrounding rock. After recovering the pillar, the convergence deformation of the footwall increased obviously in comparison with the hang wall's deformation, but it could not caused catastrophic ground pressure movement.
    Application of Subsection Stoping with Sublevel Open-stop Mining in Jiling Iron Ore
    WEI Xue-Song, QIAO Deng-Pan
    2010, 39(3):  32-35+79. 
    Asbtract ( 1875 )  
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    Jiling iron ore-body which belongs to Gansu Jinchang iron industry group is a gently inclined medium-thick ore body. The main mining method for it is sublevel stoping with its sublevel height of 10m and medium-length hole blasting. The ore recovery is about 50% and the dilution is about 29%, which have been maintained for many years. Research showed that there are many problems of the sublevel stoping process, such as large excavation volume of the footwall waste rock, large amount of ore drawing loss, and the top pillar can not be recovered etc. In light of the problems above, the sublevel stoping by step-stoping was applied in Jiling iron. The practice shows that the recovery can be increased from 50% to 68%～70%,and the dilution rate can be decreased from 29% to 17%～20%, so the economic benefits are greatly significant. The process provides a reference to the similar mine.
    Analysis on the Rock Slope Stability with Strength Reduction Based on Equivalent Mohr-Coloumb Criterion
    LI Yue, YANG Yong-Sheng
    2010, 39(3):  36-39. 
    Asbtract ( 1978 )  
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    The traditional Strength Reduction Technique (SRT) was based on the linear Mohr-Coloumb criterion, and the analysis result is reliable for the general soil materials. However, to the rock material whose stress-strain characteristic is nonlinear, the Generalized Hoek-Brown criterion is much more accurate. In this paper, the Equivalent Mohr-Coloumb criterion was adopted, and it takes the advantage of Generalized H-B and M-C criterion into consideration. And in combination with Golden Section Search Algorithm to calculate the Safety Factor of an open pit slope, the slide surface was also searched automatically, and the possible failure mode analysis was carried out based on the stress-strain relation. All of these works provided a basis for the following slope reinforcing design.
    Study on Bio-dephosphorization for High Phosphorus Oolitic Hematite ore of Western Hubei
    BAO Guang-Ming, GONG Wen-Qi, HU Chun, HUANG Teng, LI Yu-Biao, XIN Zhen-Kai
    2010, 39(3):  40-42+56. 
    Asbtract ( 1666 )  
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    The main factors of affecting the removal of phosphorus for high phosphorus oolitic hematite ore by the synergistic effect of Acidithiobacillus thiooxidans (At. t) and Acidithiobacillus ferrooxidans (At. f) were studied. The results showed that when At. t was mixed with At. f at a ratio of 2∶〖KG-*2〗1, the dephosphorization rate can reach 88.7%. Experimental study on the influence of the initial pH and pulp concentration indicated that in the pH range of 1.8～2.5, the bacterial dephosphorization level was high, whereas, the effect of bio-dephosphorization is depressed with the pulp concentration of above 5%.
    Experimental Study on Rotary Magnetic Roasting for a High-phosphorus Oolitic Hematite and Limonite Ore
    XIAO Jun-Hui, ZHANG Yu
    2010, 39(3):  43-47. 
    Asbtract ( 1880 )  
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    The pilot tests ofΦ800 mm×9 000 mm rotary magnetic roasting are carried out for a Sichuan high phosphorus oolitic hematite-limonite ore. The new Pharmacy (LCP) which is developed by our own, was added into roasting process, leading to an ideal effect of phosphorus reduction. Through the tests, an integrated process condition was obtained as follows: roasting temperature at 1 000 ℃, roasting time at 45  min, coke content of 8%, coke size of -1 mm, pellet diameter of -30 +10 mm, LCP amount of 10%, first stage grinding fineness of -0.100 mm 100%, the weak magnetic field intensity B1 = 0.30 T, second stage grinding fineness of -0.045mm more than 80%, the weak magnetic field strength B2= 0.12 T. Under these conditions, a good index can be achieved with iron grade of 65.93%, phosphorus grade of 0.225%, iron recovery of 78.91%. The success of the process provides a new thought for development and utilization of high-phosphorus refractory iron ores.
    Research on the Process of Roasting Magnetic Separation-Acid Leaching for Oolitic Hematite Ore
    LIU An-Rong, TANG Yun, ZHANG Qin, YANG Qiang
    2010, 39(3):  48-52. 
    Asbtract ( 2282 )  
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    The process of roasting-magnetic separation and acid leaching was adopted to deal with oolitic hematite ore in Hezhang, Guizhou, and the influence of the roasting-magnetic and acid leaching element on iron increase and phosphorous reduction was investigated. The results show that roasting temperature and grinding fineness have an obvious effect on iron increase and phosphorous reduction. With the roasting temperature increasing, iron grade and recovery were all first increasing and then decreasing, while phosphorus content was first decreasing and then increasing. With grinding fineness increasing, iron grade was first decreasing and then increasing, while iron recovery was first increasing and then decreasing and phosphorus content was reducing gradually. Using acid leaching would reduce the phosphorus content to 0.20% below in the roasting - magnetic concentrate. When the ore was roasted for 40 min with 5.00% coal powder amount at the temperature of 800 ℃, after first grinding then adopting a flow-sheet consisting of one-roughing and one-cleaning magnetic separation, an iron concentrate grading 59.21% at a recovery of 70.32% with phosphorus content of 0.43% was obtained. When acid leaching for magnetic separation concentrate was adopted, an iron concentrate grading 60.43% with phosphorus content of 0.18% was obtained.
    Study on the Beneficiation Technology of a Hematite-Limonite Ore of Shanxi
    ZHANG Ling-Yan, YANG Xiang-Feng, WANG Fang, HONG Li, WEI Ting-Ting, CHEN Hui-Jie
    2010, 39(3):  53-56. 
    Asbtract ( 2121 )  
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    Iron minerals in an iron ore of Shanxi are mainly limonite and hematite, and gangue minerals are mainly bauxite, kaolinite, mica, phosphate rock and so on. The ore is characterized by fine dissemination size of iron minerals, embedding with gangue minerals, being difficult to dissociate, so it belongs to refractory iron ores. Specular iron ores are mixed with this Shanxi iron ore. When the ratio of Specular iron and hematite-limonite was 2∶〖KG-*2〗5, an iron concentrate grading of 60.15% at a 52.28% recovery was obtained through a closed-circuit flow of one-roughing with shaking tables, one-cleaning, and tailing concentrate back to the rough beneficiation.
    Research on LKD New-type Anionic Reverse Flotation Collector
    SONG Ren-Feng, GUO Ke, ZHANG Chang-Kui, MENG Guang-Dong, LI Wei-Bing
    2010, 39(3):  57-61. 
    Asbtract ( 1927 )  
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    Application of the anionic reverse flotation collector in China is studied. The method of fatty acid modified with ozone (O3）by oxidation becoming the synthetic collector was introduced. On this basis, flotation tests with single modified anionic reverse flotation collector, of combining with the modified anionic reverse flotation collector and LKD new-type anionic reverse flotation collector were investigated.
    Experimental Research on Sulfur Removal from an Iron Concentrate by Column-type Desulfurization Process
    CHEN Tian-Xiu, DI Ai-Feng, ZHANG Jian-Qiang, XU Chao, DING Qi-Peng
    2010, 39(3):  62-65. 
    Asbtract ( 1983 )  
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    A desulfurization research on the magnetite concentrate with a sulfur content over 0.4% was conducted by flotation column. The ideal operational conditions had been investigated through the systematic flotation column tests in the lab. The results are as follows: grinding fineness of -200 mesh over 96.8%, the dosage of xanthate 240 g/t, Na2S 800 g/t, CuSO4 200 g/t, 2# oil 200 g/t. On these conditions, the sulfur content in Fe concentrate can be reduced to 0.084% after once flotation column test. However, the sulfur in Fe concentrate is still more than 0.2% by a flotation process of one-roughing, two-cleaning and one-scavenging.  
    Processing Mineralogy Research of Picacho Celestite in Qinghai
    WANG Shu-Ya, LONG Guang-Ming, QI Mi-Xiang, YANG Zhan-Shou, LI Jia-Sheng
    2010, 39(3):  66-71+110. 
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    The process mineralogy study was made to identify the mineral composition, occurrence forms, structure and texture, and the liberation degree of Picacho celestite from Qinghai. It is a useful reference for developing celestite ores in this area. The strontium mainly occurs in the forms of strontium sulfate. Carbonate mineral is the main gangue mineral. The liberation degree of celestite is more than 80% when the grinding fineness is between 100 and 200 mesh.
    Preparation of Nanometer Chiolite with Expired Phosphoric Acid-based Polishing Agent
    GUO Chang-Ming, LI Xuan-Hai, LI Hua-Sheng, DENG Yu-Ying, LI Hao
    2010, 39(3):  69-71+110. 
    Asbtract ( 2348 )  
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    A novel technology on direct preparation of nanometer chiolite from expired phosphoric acid-based polishing agent is investigated. With the reaction temperature 50 ℃, reaction time 40 min, stirring rate 200 r/min, dosage of hydrofluoric acid sodium hydroxide at 1.2 and 1.0 times of stoichiometry respectively and state time 1 day, the removal rate of aluminum in expired phosphoric acid-based polishing liquid reaches up to above 90%, and the productivity of chiolite is about 8%~10% of the polishing liquid with pellet diameter of chiolite about 25~30 nm. Compared to the traditional processing craft with expired phosphoric acid-based polishing liquid, the novel technology can not only make the expired phosphoric acid-based polishing liquid regeneration, but also can easily get the excellent product with high purity. It will be an ideal perspective in application and dissemination. 
    Improvement of Determination Method of Loss On Ignition of Iron Ores
    ZHANG Ai-Zhen, CHEN He-Hai, REN Chun-Sheng
    2010, 39(3):  72-73+90. 
    Asbtract ( 1860 )  
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    This method widened the detecting range of loss on ignition（LOI)of iron oreAccording to different types of iron ore，several factors which influence on the determination such as moisture，Fe(II)-oxidizing etcwere analyzed and more accurate determination results were obtained after adjustment
    Approach for Calculating Groundwater Evapotranspiration and Infiltration and its Error Analysis
    ZHANG Fu-Qun, SUN Li-Na, JIN Cheng-Zhu
    2010, 39(3):  74-76+102. 
    Asbtract ( 2120 )  
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    In the areas with high precipitation and low temperature, zero flux plane method is not fit for calculation of groundwater evapotranspiration and infiltration. To resolve this problem, a suit one should be selected. First of all, several methods to calculate groundwater evapotranspiration and infiltration are introduced such as zero flux plane method, instant profile method, orientated flux method and Penman equation, et al. and its principals, calculation expressions, the applying conditions and the effects of these methods. By the primary analysis of observation of lysimeter, the methods above mentioned are used for calculation and error analysis of groundwater evapotranspiration and infiltration. The results showed that the method to calculate the groundwater evapotranspiration and infiltration should be selected according to the local natural conditions, lithologic characters and groundwater tables. The selected method directly affects the precision in calculation. In addition, the calculating limit and the accuracy of the tensiometer are important factors that result in calculating errors.
    Hydrogeochemical Conditions of In-situ Leaching Uranium Exploration for Shihongtan Deposit
    LIU Jin-Hui, SUN Zhan-Xue, ZHOU Yi-Peng, LI Xue-Li, SHI Wei-Jun
    2010, 39(3):  77-79. 
    Asbtract ( 1750 )  
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    According to the hydrogeochemical features of high mineralized underground water in Shihongtan deposit, the hydrogeochemical principles were applied to analyze the reasons for CaSO4 precipitation by acid in-situ leaching and CaCO3 precipitation by alkaline in-situ leaching. Based on this, the optional hydrogeochemical conditions for both of methods were obtained by the simulation calculation and lab tests. The above study is of importance for in-situ leaching exploration of sandstone type uranium deposits under high mineralized underground water.
    Geological Characteristics of the Sunyelin Copper Deposit in  Liwu Copper Mine of Sichuan Jiulong
    XIA Xiang-Biao, TANG Gao-Lin, FENG Xiao-Liang, ZHANG Hui-Hua, WU Zhen-Bo, LI Tong-Zhu
    2010, 39(3):  80-85. 
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    Sunyelin copper deposit in Sichuan Jiulong is located in the north of Jianglang magma - metamorphism core complex, and is one of mining areas in Liwu copper mine. The Geological Characteristics of Sunyelin copper deposit was analyzed from the stratum, structure, wall-rock alteration, ore-body characteristics and ore nature. By deep proof with drilling, the extension variation in depth on S-3 and S-4 ore-body was studied. It was showed that wall-rock had a strong alteration. And its grade and thickness of the stratoid ore-body vary in depth. There are multi-storied ore-body with low grades. Metallization is connected with silicified quartz reef, sericitization and garnet, and so on. Thus there is a good prospection for hunting copper deposits surrounding the Sunyelin copper deposit.
    Ore-controlling Structure System of Dayin’gezhuang Gold Deposit in Jiaodong Region
    LI Zi-Ying, ZHANG Rui-Zhong, ZHOU Chun-Sheng, QIN Wen-Kai, QIN De-Dian
    2010, 39(3):  86-90. 
    Asbtract ( 1963 )  
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    Based on the field geological prospecting and exploration and mining information of the Dayin’gezhuang gold deposit, its ore-controlling structure system is deeply discussed from three aspects as the ore-controlling compositions, forming process and evolvement mechanism. Ore-forming rules of deposits including distribution of ore bodies, occurrence position, shape and local enrichment rule, were summarized. According to this rule, good ore-prospecting targets will be found in this mine.
    New Ideas of Solving Dust Cohesive Force of the Electrostatic Precipitator
    ZHANG Yong-Liang, TANG Min-Kang
    2010, 39(3):  91-93. 
    Asbtract ( 2210 )  
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    This paper analyzes the necessity and application of ESP in environmental protection in our country, briefly introduces ESP research status at home and abroad, pointing out challenges and current main problems of technical aspects facing by ESP application. From summing up a large number of foreign researches, it is pointed out that the most important factor of impacting ESP is dust cohesive force. The idea of adjusting the cohesive force between polar plate and dust is put forwards from the perspective of dust polarization theory and polar plate electronic work function. According to theoretical study above, the latest research that selects a coating used in cohesive force surface to adjust dust cohesive force is proposed.
    Problems and Solutions to Developing Automatic Deformation  Monitoring Software for Surveying Robot with GEOCOM
    MAO Ya-Chun, WANG 恩De, CHEN Yong-Sheng, YANG Yi-Zhou
    2010, 39(3):  94-96+121. 
    Asbtract ( 1674 )  
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    The function of modules in the second development platform GEOCOM provided by Leika Instrument Company and the meaning and utilization of relevant parameters of main modules are introduced. The technical problems encountered frequently in second developing with GEOCOM are also illustrated and the solutions are put forward. The experiences in writing controlling software for surveying robot with GEOCOM are summarized.
    Application of the Portable XRF Instrument in Mineral Exploration
    TANG Ai-Xiong, PANG Rong-Hua, FANG Fang, ZHANG Zun-Zun, XU Chang-Ming
    2010, 39(3):  97-99. 
    Asbtract ( 1668 )  
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    In wild mineral exploration, some elements can be obtained by observing crystal mineral in certain condition, but most elements can only be obtained by analysis of samples. Even, some elements need to be determined by analyzing its associated or symbiotic elements. In this prospection, it is through measurement of Au's associated elements, namely As, Pb with the portable X-ray fluorescence analysis instrument that the sectional elements' relative contents in this district are determined. And according to X-ray Analyzer Instrument's result about soil and water samples, the background value of the projected area is determined and the favorable region of gold and multi-metal mineralization is marked off. 
    Research on Technical Framework of Chamber Blasting Designing Visualization System
    WANG Xiao-Qing, ZHANG Yun-Peng, GAN De-Qing, LIU Ya-Jing, WANG Min
    2010, 39(3):  100-102. 
    Asbtract ( 1747 )  
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    The paper introduced a general chamber blasting designing visualization systemThis system was designed with VC++6.0 and OpenGL in Windows environment，in combination with the database of Access and the technology of ADOThe paper stated the design conception of the system and the operation method of the main modules.
    The Tracking and Locating System of Underground Mining Personnel based on Zigbee and CAN Technology
    SHENG Zhan-Shi, CHEN Ya-Ping, DONG Guo-Gui, WANG Guo-Jun
    2010, 39(3):  103-105. 
    Asbtract ( 1978 )  
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    Due to the imperfect orientation system of mining personnel, the tracking and locating system for mining personnel is proposed based on Zigbee and CAN technology. Then, the constitution of system and the design of hardware and software about the reader in corn are introduced in detail. The advanced RSSI orientation algorithm is adopted to solve the problems of orientation. Through experiments on underground mine, the system can realize the correct orientation of the mining personnel.  
    Application of 3D Geological modeling in Mineral Resources Development
    ZHANG Xiao-Kun, ZHANG Hao
    2010, 39(3):  106-110. 
    Asbtract ( 2241 )  
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    Three-dimensional visualization modeling technology of geological bodies (3DGM for short）in mining not only promotes the management and sharing of geological information, but also makes guidance to exploration and layout of mining engineering to ensure the scientific of mine design, reduce hazard and advance development efficiency of solid mineral. Therefore it takes on extensive application and important value at mineral resources development. The paper summarizes the technology of 3DGM, which included the purpose and key process of 3DGM in mining. Meanwhile, the application and significance of 3DGM in the development of mineral resources are introduced in brief.
    Discussion on the Application of High-pressure Roller Mill
    XUE Min
    2010, 39(3):  111-112+138. 
    Asbtract ( 2107 )  
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    Based on studies of the experiment and the production of high-pressure roller mill, application conditions for high-pressure roller mill techniques are introduced. And products by high-pressure roller mill in Dagushan iron ore are explored to improve the grinding conditions, increase processing capacity, and promote production efficiency, thus providing a technical support for the next improvement.
    Effect of Different Grinding Media on the Pulp Potential during Chalcopyrite Milling
    WANG Qin-Qin, SONG Yong-Sheng, LI Wen-Juan
    2010, 39(3):  113-115+125. 
    Asbtract ( 1595 )  
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    The relationship of pulp potential and its value of the fresh pulp and the pulp after 24 h of chalcopyrite with different grinding media are studied. Through determining the concentration of Fe2+ and dissolved oxygen (DO), the variety factors of pulp potential in chalcopyrite grinding at pH 4.67 is explained. The electrochemical interaction between iron and chalcopyrite under different pH is observed by galvanic current measurement.
    Effect of Formation of Granular Pearlite on Mechanical Properties of Troostite Classifier Blade
    JIANG Liang, ZHANG Yun-Peng, CHEN Yu-Hong, HAN Fei, MA Jian-Jun
    2010, 39(3):  116-118+179. 
    Asbtract ( 2377 )  
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    The microstructure of granular pearlite on the bottom of classifier blade are compared with that of lamellar pearlite on the middle. The forming reasons of the former and both mechanical properties' difference were studied. The research results showed that at the experimental temperature range, the pearlite spheroidization process is more absolute with the normalized temperature rising. Both hardness and impact toughness of the granular pearlite are better than that of lamellar pearlite, but the latter has a better wear resistance. 
    Application of Polarization Analysis to Microseismic Three-dimensional Positioning based on Matlab
    XIA Yuan-Yuan, LI Shi-Xiong, 吕Qing-Yong , PING Jian
    2010, 39(3):  119-121. 
    Asbtract ( 2136 )  
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    Microseismic Source location software is mainly based on the TDOA location algorithm using P -wave or S-wave travel time measured by detectorThe polarization analysis is often used to the seismic waveform noise eliminating measured by detectorIn fact，the microseismic source can be determined according to the three-component of p-wave vibration in the space stationOnly the direction of one ray can be obtained from station sites to the position of source，according to the principle of the same direction of vibration and propagation of p-wave to determine the space location of the station sites from the vibration sourceIt is clear that the intersection in all directions-ray position is the focal pointIn Combination of the advantages of Matlab software in the matrix calculation，polarization analysis can reflect the advantages of the calculation speed and positioning accuracy with relatively strong practical applicationAccording to the simulation algorithm，the polarization analysis method can be used to locate the position of micro-seismic events within the range of accuracy，thus providing another research direction for the positioning method
    Application of FTA in Analysis of Blasting Fly Rock Accident
    ZHANG Yi-Ping, ZENG Zhao-Kai, WU Gang, WANG Shui-Rui, WANG Hong
    2010, 39(3):  122-125. 
    Asbtract ( 1804 )  
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    On the basis of comprehensive analysis of blasting fly rock factors，the fault tree analysis methods was used to find out the minimum cut sets of influencing top eventsBy calculating the structure importance of essential event，the main factors of blasting fly rock fault were determined，and then the safety measures were also put forwardIt has a vital significance for reducing the accident of surface blasting
    Study on the Surface Subsidence Coefficient during the Mining of Metal Ore-body
    ZHAO Bing-Chao, YU Xue-Yi
    2010, 39(3):  126-128+170. 
    Asbtract ( 1849 )  
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    Aiming at characters of complex geologic condition on metal mines and its changeful mineral configuration, and in combination with the advantage of no-need correct on mined-out area under polar coordinates about calculating math model for surface subsidence, the math model with polar coordinates based on the theory of probability integral is introduced. Through analyzing the character of non-continue movement and deformation of sidestep subsidence in mining, and the mechanics of the overburden failure, it is concluded that the coefficient of surface subsidence is the subsection function for predicting the exploration of metal mines. It can fully explain the phenomenon of sidestep subsidence and non-continue movement and deformation, and provide a basis for further research on the surface damage character and rules during metal minerals mining. So it has a guiding meaning for on-site project.
    Analysis of Coal Mine Eco-Environmental Impact Assessment
    NIU Meng, ZHANG Yu-Xiu, WANG Yang-Jun, YANG Qian
    2010, 39(3):  129-133. 
    Asbtract ( 1998 )  
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    The factors of the eco-environmental impact assessment of coal-mine area from Qinshui county of Shanxi province are discussed. The ground depression caused by mining was predicted using the probability integral model. The soil and water loss was calculated according to the analogy method .The eco-environmental impacts of ground depression, soil and water loss were also evaluated. Some suggestions on reducing the negative impacts from mining are putting forward. The result has an important role in improving environment and sustainable economic development.
    Seepage Field Simulation and Numerical Analysis of Stability of Metal Mine Tailings Dam
    MIAO Hai-Bo, YIN Kun-Long, GUO Fu-San, LIU Chang-Chun, LI Xue-Wen
    2010, 39(3):  134-138. 
    Asbtract ( 1913 )  
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    Based on the introduction of the general process about the stability analysis of metal mine tailings dam, a gold mine tailings dam in Yangping Town, Linbao City is selected as an example. SEEP/W, the seepage analysis module of GEO-Studio, is applied to simulate the changing regularity of seepage field when the length of the dry beach is 30m, 50m or 100m respectively on the condition that the initial dam is impervious or pervious. Accordingly, SLOPE/W, the stability analysis module, is used to calculate the most dangerous sliding surface and stability factor in each condition. The results show that when the initial dam is impervious, the saturation line intersects tailings dam surface, and the groundwater will flow out from the dam surface; When the initial dam is pervious, the saturation line is lower than the initial dam and does not intersect the dam surface, in result, the groundwater will not flow out from the dam surface. In each condition, the stability coefficient is larger than the safety factor in the specification and when the initial dam is pervious the safety factor is larger than the factor when the initial dam is impervious. It also indicates that the tailings dam is stable, and it will be favorable for the stability of the tailings dam if the water permeability of initial dam is good.
    Investigation on the Finite Element Analysis of Soil Liquefaction in Mine Coupled with Theorems
    ZHU Quan-Jie, OuYang-Zhi-Hua
    2010, 39(3):  139-141+163. 
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    Mud flows phenomena in mines are extremely complex，and it is difficult to solve the problem relaying on research of soil liquefactionIn this paper，the numerical simulation of mine rock-body and the soil liquefaction is made with a dynamic non-linear coupled solid and liquid constitutive equation on the platform of OpenSeesAnd the complicated mine mud flows phenomena are analyzed by the non-dimensional analysisThe analysis results are validated with the practice，which directly show the effect of the non-dimensional values on the soil liquefactionThis may provide a fundamental basis for safe mine production
    Fault Tree Analysis of Roof Falling Accident in Mine
    WANG Wen-Cai, CEN Wang, BA Lei
    2010, 39(3):  142-144. 
    Asbtract ( 1601 )  
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    Based on the fault tree analysis of the roof falling accident in mine production systems，the various factors of causing cave-chip are found out，the qualitative analysis is carried out，and the importance of each event in roof can be determinedThrough the fault tree qualitative analysis（FTA)，the dangerous，harmful and serious consequences of accident can be evaluated to grasp the law of accident and to point out the responding preventive measures so as to eliminate accidents
    Study on Plant Optimization of Ecological Restoration of Metallurgical Mine Wasteland
    TAN Hui, ZHONG Tie, HE Xiao-Lei, LI Shu-Qin
    2010, 39(3):  145-147. 
    Asbtract ( 1553 )  
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    Taking the topical metal mine in south of China, Washan dump, as an example, the combination of the water and soil conversation and the plant restoration were present to realize the ecological restoration. Potted experiments of Species selection were first carried out to select suitable plants, and then these plants were planted in the mining wasteland. The results showed that these plants selected in the potted experiments such as Amorpha, Albizzia, Bahia grass, Bermuda grass grew well, and can be used as the optimal plants species in vegetation restoration for similar dump and mine.
    Investigation on the Removal of Zinc from Wastewater by Steel Slag
    YAO Hai-Fei, WU Yin-Wen, YANG Hui-Fen, JIN Long-Zhe, LIU Jian
    2010, 39(3):  148-153. 
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    Through measuring pH value of the filtrate after reaction, the concentration of Zn 2+ in solution，the effects of steel consumption, initial concentration of solution, pH value of solution, reaction time, the oscillation speed, reaction temperature on removal of zinc from wastewater were investigated. The results show that when steel slag with the particle size of -5 mm is chosen and under conditions of 4 g/100 mL of the steel consumption, 150 r/min of the oscillation speed at the temperature of 30 ℃ and for reaction time of 60 min, the removal rate of zinc from wastewater with Zn concentration of below 500 mg/L at pH value between 4 and 14 can be up to above 99%.
    Study on Disposal of Oily-containing Wastewater by Modified Bentonite
    GUAN Jun-Fang, YE Han, HU Xue-Feng, CAO Ming-Li, YANG Wen
    2010, 39(3):  154-158. 
    Asbtract ( 1789 )  
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    Adsorption of oily-containing wastewater was studied by using modified Ca-bentonite of the Erzhou three products as adsorbing agent. The factors of adsorption were studied, such as the liquid-solid contact time、the dosage of sorbent、initial concentration of solution、emulsification machine content and so on. The changes of adosorbent were analyzed by infrared spectrpscopy. The result indicates that the adsorption of the 1831-bentonite is the best one,and the best craft of adsorption is that the time of 1 h,the dosage of 3 g/L,the solution concentration of 50 mg/L,the detergent volume of 0.1 ml/L,and its clearance rate is more than 95%.
    Study on Treatment of Petroleum-Contaminated Soil with Coal Adsorption
    LI Ru, WANG EnDe
    2010, 39(3):  159-161. 
    Asbtract ( 1644 )  
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    Taking the petroleum-contaminated soil in Liaohe Oilfield as a case, the process of treating the contaminated soil with coal adsorption and lignite were investigated. The optimum adsorption conditions were obtained as the granularity of coal adsorption of less than 100 μm, quality rate of the lignite and the petroleum -contaminated soil of 1∶5, the temperature of reaction at 60 ℃，the stirring intensity of 600 r/min for 60 min. Under this condition, the removal rate of petroleum from the soil was over 65% and 70%. The result indicated that it was feasible to some extent to treat the petroleum -contaminated soil with coal adsorption.
    Comprehensive Utilization Study of Iron Tailings in Dashihe Iron Mine of ShouSteel
    GAO Zhi-Ming
    2010, 39(3):  162-165+186. 
    Asbtract ( 1993 )  
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    In light of the fact that small amount of strongly magnetic iron-bearing minerals exists in tailings of Dashihe Mine and plenty amount of reserves, the recovery process for magnetic iron-bearing minerals from the tailings was studied. As a result, a process consisting of beforehand magnetic-separation and two-section millings and several magnetic separation and re-concentration was adopted, which obtained a concentrate with a grade of 67.32% and a recovery of 18.91% from tailings containing of 11.50% iron. On this basis, experimental research on screening the building sand was carried out, and the process of land production by filling the remnant iron tailings into sea was discussed. 
    A Study and Suggestion on Thrifty and Comprehensive Utilization of Metal Mineral Resources in Chifeng
    SUN Yan, CHEN Jian-Ping, WANG Xun-Lian, MENG Xi, CHEN Zhen-Ping
    2010, 39(3):  166-170. 
    Asbtract ( 1806 )  
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    Chifeng, lying on the border between Middle-south Daxing'anling and the northern metallogenic belt of North China platform, is an important mineral town in Inner Mongolia, north China. Under the analysis of the characteristics and the current exploitation situation of metal mineral resources in Chifeng, the problems in thrifty and comprehensive utilization of metal minerals are studied, such as the problems in associated minerals, low grade minerals and low-level utilization of ore tailing. Then, the specific technological directions and management suggestions are put forwards.
    Study on Comprehensive Utilization of Copper Ore Tailing
    WANG 苹, DONG Feng-Zhi
    2010, 39(3):  171-173. 
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    With the purpose of comprehensive utilization of copper tailings, a reasonable process and some parameters are determined to further get copper concentrate from copper tailings by flotation process. The grade of the copper concentrate reaches up to 15.83%, and the recovery to 72.61%, improving the utilization efficiency of resources. Then the copper tailings are used as the main raw material and the gangue as cementing agent to produce fired bricks for buildings. And some researches on the mixture ratio, sintering temperature and holding time are carried out. Then the optimum conditions are determined as the ratio of the copper tailings and gangue 7∶3, the sintering temperature 950 ℃, and the holding time 1.5 h. The strength of the product can reach the MU20-class of the GB5101-2003 quality standards.
    Experimental Study on Preparation of Concrete Reactive Admixture with Kaolin Tailings
    HU Pei-Wei, YANG Hua-Ming, CHEN Wen-Rui, LIU Xue-Su, HUO Cheng-Li
    2010, 39(3):  174-179. 
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    Kaolin tailing is a kind of solid waste generated from mineral separation. The concrete admixture prepared with kaolin tailing through mechanical milling and the addition of chemical activator was primary researched. The results show that the activity of kaolin tailing can be increased dramatically through adding the chemical activator, where the activator must contain CaO or Ca(OH)2, and can include Na2SO4 or CaSO4, selectively. The 28-day compressive strength ratio of concretes reaches up to 97% after 20%~30% reactive kaolin tailing replace 10%~20% cement, and then the workability of concrete will not be affected. This technique not only reduces the amount of cement and engineering cost, but also changs waste into valuables and prevents environmental pollution with significant economic and social benefits.
    Study of β-semi-aquatic Phosphogypsum as Iron Ore Tail Cement Filling Solid Material
    Lv-LiHua , REN Jing-Cheng, SUN Tian-Hu
    2010, 39(3):  180-182+184. 
    Asbtract ( 1749 )  
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    The β-semi-aquatic phosphogypsum as gas hard cementitious material has been widely used in building materials. This test studies β-semi-aquatic phosphogypsum' waterproof performance, condensation performance and the influence of the consumption of β-semi-aquatic phosphogypsum on iron ore tailings fillings. The result shows that its cementitious materials' softening coefficient is increased to be 0.82 through waterproof modified. At the same time, its mobility diameter is 150 mm, and the beginning and final setting time can be regulated from 2 h to 8 h. When β-semi-aquatic phosphogypsum and iron ore tailings is at the ratio of 1∶7, the compressive strength of 1 d, 3 d, 7 d reaches 0.65 MPa, 0.75 MPa, 1.30 MPa respectively, which fully meets the technology requirements and performance indicators of cement filling.