Loading...
Welcome to Metal Mine! Today is Share:
×

扫码分享

Table of Content

    15 June 2012, Volume 41 Issue 06
    Previous Issue    Next Issue
    Mining Technical Improvement for Deep and Difficult Mining Orebody in Southern District Ⅱ of Xishimen Iron Mine
    CHANG Shuai, REN Feng-Yu, ZHANG Fa-Sheng, ZHANG Fu-Hong
    2012, 41(06):  1-3+8. 
    Asbtract ( 1591 )   PDF  
    Related Articles | Metrics
    The southern district Ⅱ of Xishimen iron mine is gently inclined and medium thick orebody. In the deep mining，the dip angle and the thickness decrease and the unstable floor rock becomes thick. Sublevel caving is still in application，so there are some critical problems，such as single level mining and great loss of residual ore. According to the occurrence and the stability of rock mass，an improved sublevel caving scheme that loading in trench and ore drawing in drift is purposed in this paper. The results show that the new scheme meets conditions of rocks well and mining is safe and efficient.
    Reinforced Slope Rock Mass Disturbance Mode On Mining Hanging-wall Ore in Heishan Open-pit Mine
    WANG Jin-Long, WANG Pei-Tao, YANG Tian-Hong, YU Qing-Lei, REN Feng-Yu
    2012, 41(06):  4-8. 
    Asbtract ( 1358 )   PDF  
    Related Articles | Metrics
    Heishan open pit mine has turned into underground mine. The hanging-wall ore in western reinforced slope is a large size ore body，which would be mine by pillarless sublevel caving method. The process would disturb the stability of the rock mass. Studies should be made on the behavior of slope deformation and the formation of overburden cover. Based on the data from tests of 3D contact-free measuring system and point load instrument system upon the complex slope conditions in western area of Heishan open-pit mine，the generalized Hoek-Brown criterion is applied to estimate the deformation and strength parameters of jointed rock masses. Then the behavior of rock mass and instability of the slope is analyzed using RFPA，and it has important instructive meaning.
    Comparative Analysis of Supporting Effect on Split-set Bolt and GFRP Anchor Based on FLAC3D
    MA Sheng-Hui, WANG Wen-Jie
    2012, 41(06):  9-12. 
    Asbtract ( 1492 )   PDF  
    Related Articles | Metrics
    Most tunnels of Gaofeng Mining district are supported by split-set bolt. Because of corrosion split-set bolt failed，which is caused by tunnel condition and poor anti-corrosion measure. The secondary support is necessary, which increases supporting cost and labor intensity.  The advantage of glass fiber reinforced plastic (GFRP) anchor is light weight, high strength, non-corrosion and high fatigue limit. The supported by split-set bolt and GFRP anchor in Gaofeng mine was analysis by FLAC3D. The deformation of tunnel, rock mass stress field, plastic zone and safety were compared under the same support condition. Based on the analysis of support effect by FLAC3D, the research indicates that GFRP anchor can be used instead of split-set bolt in Gaofeng mine.
    Dynamic Liquefaction Analysis of Toushishan Tailing Dam
    ZHANG Jin, LE Tao, CAO Ji-Gang
    2012, 41(06):  13-15+18. 
    Asbtract ( 1312 )   PDF  
    Related Articles | Metrics
    The Toushishan tailing bond is a proposed new tailing bond, and according to specification requirements, its level identified as second class tailing pond. The tailing pond is in 8 degrees in quake zone, and its dynamic stability should be paying attention. The Toushishan tailings in a seismic dynamic liquefaction under the action of the calculation and analysis was calculated and analyzed. It can provide the reference for tailings dam in high intensity earthquake region design and management.
    Stop Structure Parameters Optimization of Deep Ore Body in Beiminghe Iron Mine
    HE Rong-Xing, REN Feng-Yu
    2012, 41(06):  16-18. 
    Asbtract ( 1454 )   PDF  
    Related Articles | Metrics
    Beiminghe iron mine is a contact metasomatic skarn type magnetite deposit，and the sublevel caving mining method was adopted. The sublevel height is 15 m and the drift interval is 18 m. These parameters have been used mining the upper orebody，and better technical economical effect was obtained. With the mining depth increasing in recent years，the ore loss rate increase gradually，so the mine needed a new structure parameter. 20 m sublevel height based on trend of subleve development was recommended in this paper，the principle of mining using at least three subleve and the factor of beneficial to recovery residual ore on footwall. Based on calculation using a new measured granular media flow parameter，20 m sublevel is better than the 18 m drift interval. In addition，the transition way of different sublevel is put forward.
    Application of Sublevel Open Stoping afterwards Filling Mining Method in Lilou Iron Mine
    TIAN Ju-Bo, CAI Bei
    2012, 41(06):  19-21+25. 
    Asbtract ( 1701 )   PDF  
    Related Articles | Metrics
    According to the low mining efficiency，high ore loss ratio and poor ventilation quality with the application of the shallow-hole room-and-pillar mining with delayed filling in Lilou iron mine，the sublevel open stoping afterwards filling mining method was adopted above the -200 m Level. The field test results show that the indexes of this mining method are good. And it not only improve the mining intensity，labor productivity and operation safety，but also improve the economic benefic greatly. It introduces the application of sublevel open stoping afterwards filling mining method above the -200 m Level. And it includes the stope structure，stopping technology，filling technology and blasting parameters.
    Estimation of Rock Joint Roughness Based on Modified Line-Roughness
    CHEN Shi-Jiang, ZHAO Zi-Hao, WANG Chao
    2012, 41(06):  22-25. 
    Asbtract ( 1283 )   PDF  
    Related Articles | Metrics
    Based on the asperity of a rough joint occurring on many scales，Joint roughness coefficient (JRC) is presented using the elongation rate (Er) and degree of the undulation(wd），and their relationship is established through the value of standard profiles suggested by ISRM. The elongation rate (Er) is used to show the roughness character offered by secondary asperity，while the degree of an undulation (wd) is used to reflect the roughness property at the first order. On the other hand，in virtue of the difficulties in calculating the value of curve length in engineering practice，this paper provides the program for obtaining the value of curve length based on the digital image of rock joints. It would be helpful for applying the method to describe the JRC in engineering practices.
    Analysis the Stability of Slope in Open-pit Mine by Strength Reduction Methods Based on Numerical Simulation
    CHEN Jia, TANG Kai-Yuan, ZHOU Xue-Fei
    2012, 41(06):  26-28+46. 
    Asbtract ( 1254 )   PDF  
    Related Articles | Metrics
    Based on the theory of finite difference strength reduction，numerical simulation was carried out on the stability of the open pit slope using FLAC. Some safety parameters have been reported under mutations of iteration numbers，non-convergence of the calculation，and the plastic zone connection. The result shows that the slope damage can be revealed to be non-convergence of the calculation in the numerical simulation，while the connection of plastic zone is only the necessary condition of the slope damage.
    Numerical Simulation on the Ways of Initiation of Fan Shaped Holes Blasting
    ZHAO Zhi, WU Jian-Xing, HOU Long-Fei
    2012, 41(06):  29-32+41. 
    Asbtract ( 1331 )  
    Related Articles | Metrics
    According to different ways of initiation on the blasting for sublevel stoping in the Lead-Zinc mine of Xitieshan，Geermu in Qinghai province，the numerical simulations about different ways of initiation were carried by making use of highly nonlinear explicit finite element analysis software. The stress distribution，the displacement change and the energy change were compared and analyzed when blasting by the way of orifice initiation or the way of bottom of the hole initiation. The simulated results show that the way of bottom of the hole initiation was better. When blasted by the way of orifice initiation，the high-stress state appeared earlier，the ore displacement was larger，the total energy was lower than that by that of bottom of the hole initiation. Then the way of orifice initiation was not conducive to the ore crushing. The analysis provides a theoretical basis for choosing the way of mining initiation.
    Strong Rock Presure Prevention of Abnormal Stress Concentration Region in Coal Mine
    GENG Yang-Mou, WANG Zhong-Wu
    2012, 41(06):  33-36+41. 
    Asbtract ( 1853 )   PDF  
    Related Articles | Metrics
    According to the production and geological conditions of No.3 seam West 5 working face in Muchengjian coal mine，the vertical stress distribution in the process of mining was analyzed using FLAC3D. Especially the advanced abutment pressure distribution law was analysis in detail，and the abnormal stress concentration region located a sharp corner of irregular coal pillar in front of working face tailgate，which vertical stress concentration factor is 2.75. Rockburst danger in abnormal stress concentration was monitored by electromagnetic emission (EME)，when the monitoring EME intensity value was bigger than the critical warning value 100mV，the coal materials relieve-shots were measured timely for weakening rockburst danger. Meanwhile，EME was used to check the effect until the monitoring index value was lower than the critical value. Finally，the safe production of working face was ensured.
    Support Technology with Bolt-mesh-anchor for Large Span Open-off Cut of Fully Mechanized Caving Face
    LI Yun, HAN Li-Jun, SUN Chang-Xing, DONG Ye-Mao
    2012, 41(06):  37-41. 
    Asbtract ( 1687 )   PDF  
    Related Articles | Metrics
    Combined with the geological conditions and mining technology of the mining face 11118 in Panbei Mine，a design program on the roof and walls of the tunnel about the large span mechanized mining face was provided，and the support parameters were optimized through the theoretical calculations and engineering analogy. For the large span fully mechanized caving tunnel，the coupling support technology of anchor-mesh-bolt-belt was raised to effectively solve the roof security problem and the convergence deformation problem of two sides in large span caving face. And the support ways were simulated by ABAQUS. The numerical results show that the rationality of coupling support technology in supporting tunnel that has the similar surrounding conditions.
    The General Relationship between Underground Mining Tunnel and Underground Space of other Geotechnical Engineering
    WANG Xiao-Ming
    2012, 41(06):  42-46. 
    Asbtract ( 1293 )   PDF  
    Related Articles | Metrics
    As an important part of the generalized geological field，there are many common attributes between the process of underground mining tunnel excavation or maintenance and other underground space development or utilization directly in geotechnical engineering. Based on the comprehensive summing up the relationship between mining engineering and other geotechnical engineering，the use form and classification of underground engineering，the general relationship between underground mining tunnel and underground space of other geotechnical engineering，from the medium of excavation and maintenance，the mutual relationship of supporting structure and surrounding rock，the three kinds of factors about the project stability are systematically discussed. Meanwhile，the important meaning of the technical reference between the mining engineering and other geotechnical engineering is explicitly pointed out.
    Application of TEM in Goaf Exploration underneath Open-pit Slope
    FENG Shao-Jie, YANG Zhan-Jun, LI Huan-Zhong, ZHANG Zhan-Bin, GUAN Yu, XIN Fang-Chao, YAN Hao
    2012, 41(06):  47-49. 
    Asbtract ( 1183 )   PDF  
    Related Articles | Metrics
    The basic principle of the transient electromagnetic methods (TEM) in goaf exploration was introduced. Combined with realistic problems in Fusun east open-pit mine which goaf cause the serious influence on safety production，old mining area of the north slope in open-pit mine was explored by TEM. According to the detection results，the dangerous abnormal area was determined. It avoids losses from the blind drilling，and it provides scientific basis for safety mining design and safety control of the open pit.
    Experiment on Coal-based Direct Reduction-low Intensity Magnetic Separation of a Refractory Iron Ore in Yunnan Province
    WANG Jing-Jing, YANG Hui-Fen, CAO Zhi-Cheng, XIAO Jing-Jing, WU Xiao-Dan
    2012, 41(06):  50-53. 
    Asbtract ( 1287 )   PDF  
    Related Articles | Metrics
    A iron ore of Yunnan is mixing iron ore, it is hard to separate by conventional recovery techniques for micro-fine iron ore. The method with coal-based direct reduction followed by low intensity magnetic separation is presented for this kind iron ore. The results show that the direct-reduction iron concentrate with grading 91.20% and recovery 87.05% is obtained under  the conditions of roasted ore by two-stage grinding and low intensity magnetic separation process with the weight ratios of iron ore/lignite/CaO as 100∶20∶10, the reduction roasting temperature of 1 200 ℃ for 50 min, the roasted ores-grinding fineness of 325 mesh 81.34% and 92.41% in the first and second grinding classification, two stage low intensity magnetic separation of 187.10 and 143.31 kA/m. The study offer the technical support for development and utilization of refractory iron ore.
    Experimental Research on the Reverse Flotation of Magnetic Separation Concentrate from Bolun Iron Mine by Cationic Collector GE- 609
    XIONG Xue-Heng, GE Ying-Yong, ZHANG Guo-Song, ZENG Li-Ming
    2012, 41(06):  54-56+63. 
    Asbtract ( 1279 )   PDF  
    Related Articles | Metrics
    Bolun roasted iron ore in Xinjiang by magnetic separation produces iron concentrates that have an iron grade of only about 60% but SiO2 content more than 10%. In order to increase the quality of iron concentrate, using GE-609 developed by Wuhan university of technology as collector, get the satisfactory results of the grade of concentrates and the recovery being 65.59% Fe and 95.94% respectively. However, the grade of reverse flotation tailings is still as high as 21.36%. With a process consisting of reverse flotation, middling regrinding and low  intensity magnetic separation, gaining the tailing containing Fe 14.87%. The iron concentrate of low intensity magnetic separation with Fe grade 38.12% can be returned to the flotation operation.
    Test Research on Beneficiation of a Low-grade Chromium Ore
    HU Yi-Ming, HAN Yue-Xin
    2012, 41(06):  57-60+67. 
    Asbtract ( 2513 )   PDF  
    Related Articles | Metrics
    Based on the exploratory experiment by the methods of separation in heavy liquid and high intensity magnetic separation，according to the gravity separation method carried out several flow-sheets to the low grade chromium ore containing Cr2O3 about 14%. The results show that after grinding the raw ore to the particle size at -0.076 mm 50%，then separating to +0.076 mm and -0.076 mm two size fraction，by gravity separation with shaking table，can get the concentrate with the grade of Cr2O3 at 45.64%，recovery at 67.99%. These provide a basis for reasonable utilization to this kind low grade chromium ore.
    Flotation Behavior of Ultrafine Hematite in Sodium Oleate Flotation System
    TAO Hong, ZHANG Qin, WANG Fei, ZUO Qian
    2012, 41(06):  61-63. 
    Asbtract ( 1336 )   PDF  
    Related Articles | Metrics
    Flotation behavior of ultrafine hematite and the effect of five types of depressors（sodium hexametaphosphate, sodium silicate, sodium pyro-phosphate, starch, sodium humate）on ultrafine hematite recovery in NaOl flotation system were researched. The results show that ultrafine hematite reaches to good floatability when the concentration of sodium oleate is 4×10-4 mol/L and pH value is 10. The five types of depressors all have obvious depression on ultrafine hematite flotation, organic depressors have a better depression effect than inorganic depressors, and the depression effects of the five depressors are in the order of starch＞sodium humate＞sodium pyro-phosphate＞sodium hexametaphosphate＞sodium silicate.
    Cu/S Separation Flotation Technique of a Copper Ore in Low-basicity Pulp
    ZHOU Yuan, WU Yan-Ling, LIU Cheng, GUO Wen-Feng
    2012, 41(06):  64-67. 
    Asbtract ( 1443 )   PDF  
    Related Articles | Metrics
    To resolve the problem of using only lime as depressor at Cu-S separation in a copper mine ore-dressing plant in Jiangxi, and bringing environment pollution when pulp pH above 12, causing scale on equipment and pipe, then using a new depressor DT-4# which was researched by Jiangxi University of Science and Technology instead of mostly lime. For the ore to carry on Cu-S bulk flotation and then regrinding and Cu-S separation flotation test, realized the effective Cu-S separation in low-basicity pulp（pH=8）and obtained copper concentrate with a copper grade 23.45% and recovery 90.38%, and sulfur concentrate with a sulfur grade 44.67%  and recovery 91.63%.
    Experiment Study on a Low Grade Copper-molybdenum Ores
    HU Zhi-Gang, DAI Shu-Juan, MENG Yu-Qun, SHAO Kun
    2012, 41(06):  68-71+78. 
    Asbtract ( 1286 )   PDF  
    Related Articles | Metrics
    Molybdenum and copper content in a copper-molybdenum ores is low, Cu-content is 0.081% and Mo-content is 0.19%. The disseminated size of Cu minerals is fine and symbiosis with molybdenum ores, that take difficult to separation of Cu and Mo. By using the flowsheet of bulk flotation of Cu and Mo, regrinding and re-concentrantion after mixed concentrate cleaned, and then separation of Cu and Mo, the experiment index of concentrate grade of Mo at 45.30%, the recovery of Mo at 84.16%, the concentrate grade of Cu at 14.28%, the recovery of Cu at 89.59% were got on the condition of the size of the first and the second grinding each -0.074 mm 70%, -0.045 mm 95%, using lime, sodium silicate as modifier, using butylamine black agent and kerosene as collector in the mix-flotation, using lime, water glass and SK as the modifier, using kerosene as collector in the separation flowsheet of Cu and Mo.
    Experimental Research on Flotation Processing Technology for Low Grade Ascharite Ore in Dandong
    CHENG Ren-Ju, ZOU Chun-Lin, LI Yan-Jun, LI Cheng-Xiu, DENG Shan-Zhi
    2012, 41(06):  72-74+78. 
    Asbtract ( 1521 )   PDF  
    Related Articles | Metrics
    In view of characteristics of low grade ascharite ore in Dandong, the study on flotation is carried out using sodium hydroxide as pH adjustment agent, sodium oleate as collector and compound agent FLM3 as inhibitor. In the crude ore B2O3 grade of 6.72%, the final concentrate grade of closed product is 12.65%, concentrate yields is 37.66%, and concentrate recovery is 70.88% by adopting a circuit of one roughing, two concentrating and one scavenging. The test index provides a basis for reasonably recovering these mineral resources.
    Flotation Separation Experiment of Copper from Lead Concentrate of Nanjing Pb-Zn-Ag Mine
    LUO Xian-Ping, ZHANG Jian-Chao, QIAN You-Jun, MIAO Jian-Cheng
    2012, 41(06):  75-78. 
    Asbtract ( 1322 )   PDF  
    Related Articles | Metrics
    In order to reduce the copper content of Nanjing Pb-Zn-Ag Ore lead concentrates and obtain qualified copper concentrate，adopted K2Cr2O7+CMC as lead combined depressants，Jiangxi university of science and technology researched and developed the LP-01 as copper collector to the lead concentrates on copper flotation separation in laboratory. The copper content of lead concentrate reduced from 1.01% to 0.41%，and access to the copper concentrate with grade 18.12%，recovery 61.05%. Based on the test in laboratory further industrial experimental was done，the lead concentrates with copper content reduced from 2.85% to 1.34%，and received copper concentrate grade 21.68%，copper recovery 56.39%. Industrial experiment also shows that the wastewater of copper concentrate and final lead concentrate containing Cr6+ can be recycled by the sodium sulfite+lime，thus maximum limit avoids Cr6+ pollution to the environment.
    Dressing Process of a Complex Cu-Pb-Zn Polymetallic Sulfide Ore in Inner Mongolian
    LI Wen-Juan, SONG Yong-Sheng, LIU Shuang, CAI Liao-Lu, ZHOU Gui-Ying
    2012, 41(06):  79-84. 
    Asbtract ( 1354 )   PDF  
    Related Articles | Metrics
    Due to the complex symbiotic relationship of copper, lead and zinc sulfide ores from Inner Mongolian a mining company, it's very difficult to separate. In order to develop these ores, carried out dressing tests by multiple schemes. The results show that, the conventional flotation process can't separate these ores, but the process of lead gravity separation-bulk flotation of copper and zinc then flotation separation can get the lead concentrate with grade 57.20%, recovery 54.18%, copper concentrate with grade 13.35%, recovery 57.11%, rich contain of zinc material with zinc content 18.78%, recovery 41.94%. Rich contain of zinc material can be sold with high grade zinc concentrate from other concentrators.
    Determination of Weight of Visible Water in Imported Iron Ore Fines by Flowmeter-draining Method
    ZANG Shi-Yang, WANG Zhen-Kun, LIU Qing-Shan
    2012, 41(06):  85-87. 
    Asbtract ( 1476 )   PDF  
    Related Articles | Metrics
    Practical flowmeter-draining method is created to determine the weight of visible water in imported iron ore fines at discharging port. In this method, total volume of visible water drained is determined by means of flowmeter. On-line sampling device of visible water is designed specially to obtain sample of visible water. Density of the sample and weight percentage of ore particles in the sample are determined in laboratories. Thus the weight of visible water in iron ore fines can be calculated. The representative sample of visible water is taken by using on-line sampling device, while boarding the ship and interrupting the discharge of visible water are not needed. This lays the foundation of the accuracy of new method|Imported iron ore fines|Determination of weight of visible
    Development of Mine Hydrological Dynamic Monitoring Information Visualization System
    LI Hua, LI Cun-Rong, WU Hao, HUANG Jie-Jun
    2012, 41(06):  88-91. 
    Asbtract ( 1285 )   PDF  
    Related Articles | Metrics
    Based on the hydrological dynamic monitoring information of the Donghuantuo mine，the visualization system about the hydrological dynamic monitoring information of the Donghuantuo mine was developed using the software engineering idea and the component development mode，and combining the Visual studio.net Visual development tool. This system can unified arrange，reasonably divide all of the data about the monitoring information and the mine environmental data. The system has the function of map query，three dimensional control，spatial analysis，drill management，data output，which satisfy the integration and three dimensional visualization of the mine hydrological information. And it also provide a quick reliable technical support to safe mine manufacture.
    Discussion on Monitoring of Uranium Tailing Pond Based on GPS Combined with Remote Sensing Images
    ZHU Yu-Feng, LU Tie-Ding, ZHOU Shi-Jian, ZANG De-Yan
    2012, 41(06):  92-93+101. 
    Asbtract ( 1397 )   PDF  
    Related Articles | Metrics
    Ministry of education studied the characteristics of the tailing pond ground of Xiangshan uranium field，Using remote sensing images of uranium tailing pond monitoring for consolidation planning，laying GPS monitoring stations，running state of tailing pond and its DAMS displacement monitoring. Monitoring results show that the tailing pond is not quite stable,the effective security measures of the improvement are needed to proceed.
    Application of GA-LSSVM in the GPS Elevation Anomaly Calculation
    ZHANG Xiang, DENG Ka-Zhong, FAN Hong-Dong
    2012, 41(06):  94-96. 
    Asbtract ( 1616 )   PDF  
    Related Articles | Metrics
    Against the shortcoming of the traditional GPS elevation anomaly calculation methods，used the GA-LSSVM to calculate the GPS elevation anomaly. The experiment shows that GA can select the suitable parameters of the LSSVM. In the case of limited sample，the GA-LSSVM model can overcome the disadvantage of the small sample，and obtaion the accurate results. By evaluating the accuracy of the results，the GA-LSSVM can be
    Complex Orebody Spatial Visualization Orebody Profile Triangulation Algorithm
    GU Qing-Hua, LU Cai-Wu, FENG Zhi-Dong
    2012, 41(06):  97-101. 
    Asbtract ( 1514 )   PDF  
    Related Articles | Metrics
    Profile splicing technology of 3D visualization modeling of complex ore body is studied. According to the complex orebody profile appeared in the section between the irregular location and scale，concave profile line，triangle between the splicing end concave profile lines within the triangle joint，branch composite and profile corresponding stitching. Minimum circumscribed rectangular box，concave profile line of the convex hull of projection and bump rejection method are put forward the corresponding profile stitching algorithm. Finally，the simulation has been carried and verified. The examples show that this algorithm constructs 3D orebody effectively，and it can also simulate the real complex three-dimensional structure and distribution of ore body accurately.
    Sulfur and Lead Isotope Compositions and Their Geological Implications of the Jiama Copper Polymetallic Deposit
    ZHOU Yun, TANG Ju-Xing, QIN Zhi-Peng, PENG Hui-Juan
    2012, 41(06):  102-105. 
    Asbtract ( 1458 )   PDF  
    Related Articles | Metrics
    The study of S and Pb isotopic data for the bearing-copper porphyries and metals in Jiama copper polymetallic deposit，show that the S isotope and Pb isotope compositions from ore minerals are similar to those from porphyries，and vary slightly. The sulfur isotope fractionation in the ore fluid almost reaches the equilibrium，showing the typical signature of mantle S. The uniform Pb isotope compositions for the deposit imply that the Pb isotopes may have the same origin and similar developing history. The Pb isotopes are plotted mostly between the mantle and orogenic belt evolution curves in the plumbotectonic framework diagram. The ore-forming materials in Jiama copper polymetallic deposit were mainly from magma. The ore-forming porphyry was formed due to upper-crust under the orogene，and the input of enriched mantle components.
    Eliminating Accelerated Flow Technique Used on Slurry Pipeline in PNG Ramu Nico Red Soil Ore Project
    DONG Li-Wei
    2012, 41(06):  106-108+112. 
    Asbtract ( 2461 )   PDF  
    Related Articles | Metrics
    The slurry pipeline in PNG Ramu Nico red soil ore project generated accelerated flow in the section of K44+300 to K45+400 on the test running stage when it completed，and it caused a displacement on vertical and horizontal direction of the pipeline on the section of K43~K45+800(about 3 km). The maximum displacement is up to 1.5 m，anchors of pipeline cracked，pine supports inclined，optical cable along the pipeline be snapped. In order to eliminate accelerated flow，an S-shaped transitional bend circuit laying method was suggested，and the pipe laying technology was modified at the same time. After modification，the pipeline did not generate accelerated flow on the next test running. It works well，and has a sound effect.
    Application of Dynamic Property Management of GIS in Open-pit Mine Truck Dispatching
    ZHANG Wei-Guo, SUN Xiao-Yu, WANG Yan-Bin
    2012, 41(06):  109-112. 
    Asbtract ( 1518 )   PDF  
    Related Articles | Metrics
    Open-pit mine truck dispatching system combines the advantages of Global Positioning System (GPS) and Geographic Information System (GIS)，and GIS information is mainly related to topography，road network，the key points,etc. The characteristics of the information are quickly changed by production，need to pass to and share by the mobile terminal wireless network，and require the simple functions. There is a systematic classification of GIS information about dispatching system for efficiency and quality to meet the system requirements and put forward the method of mine GIS dynamic property management according to the different categories to simplify the use of different means.
    Remote Monitoring and Energy Saving Research of Multistage Fan Station Ventilation
    JIA An-Min
    2012, 41(06):  113-119+159. 
    Asbtract ( 1577 )   PDF  
    Related Articles | Metrics
    Taken the areas of Dongguashan copper mine ventilation system as an engineering background，combined with self-developed Ethernet-DCON control unit，the DCON remote I/O control units and monitoring system software，the computer network communication technology，the fan frequency conversion control technology，as well as underground airflow and environmental parameters monitoring technology were applied，the fans of multistage fan station at all levels (including the fan start and stop and reversing control，frequency conversion control，operational status and parameters monitoring，etc.) were remote centralized monitoring. And the airflow parameters (airflow velocity and air flow volume) in main ventilation tunnels，underground atmospheric environmental parameters (temperature，humidity，concentration of O2，NO2 and CO) were automatic and continuous monitoring.
    Numerical Simulation of Concentration Distribution and Coal Slurry Settlement Flow Field in Thickener
    JIA Kai, WANG Yong-Tian, GONG Hao
    2012, 41(06):  120-123. 
    Asbtract ( 1331 )   PDF  
    Related Articles | Metrics
    Pro/E software was used for geometric modeling of coal slurry settlement thickener and according to the principle of computational fluid dynamics，used RNG k-ε turbulent model and the mixture multiphase model to simulate the internal flow field in thickener and the coal slurry settlement distribution. The conclusion from the simulation was used to fit the mathematical model formulas of coal slurry settlement distribution，providing an easy way for an optimal structure design of thickener from theory.
    Several Principles on Safety of Specific Design in Metal and Nonmetal Mine
    JIANG Ren-Yi, YANG Xu, ZHANG Ming-Feng
    2012, 41(06):  124-126+136. 
    Asbtract ( 1604 )   PDF  
    Related Articles | Metrics
    According to the problems and mistakes in safety of specific design in metal and nonmetal mine，several principles were put forward in this paper，such as compliance，integrity，operability，partition and period，maximization of personal safety，corresponding or correlation，compatibility，principal，foresighted，etc. Following the principle in the design is favorable to avoid or reduce the problem and mistake，and it may be referred in the design by designers later.
    Experimental Study on Consolidation Mining Area of Pavement of Mining Solid Waste Materials
    ZHENG Jian-Jun, LIU Zhan-Quan
    2012, 41(06):  127-128. 
    Asbtract ( 1414 )   PDF  
    Related Articles | Metrics
    The iron ore tailings mud and gravel drift mine is the main emission solid waste Bayanobo West Mine Concentrator. Tailings mud instead of sand，drift gravel instead of graded gravel，RCC process was adopted in the mine road construction. It improves the mine haulage road traffic，and extends vehicle service life.The trial achieved its optimum moisture content and the largest proportion of indicators, and 28 d compressive strength of more than 18 MPa industrial test road in the mining area on the main transport ramp, a total of 4, the road length of 66.5 m, width 9.0 m, covering an areaabout 600 m2 with feeding amount a total of 165 t - tailings mud the average strength of roller compacted concrete pavement core samples of concrete strength test results, in more than 18 MPa.
    Study on the Mine Microseismic Monitoring in Closed Distance Lower Coal Mining
    QU Cheng-Min, HE Feng, FENG Guan-Yi
    2012, 41(06):  129-132+141. 
    Asbtract ( 1443 )   PDF  
    Related Articles | Metrics
    The closed distance coal seam mining has large proportion in China，and recoverable mining coal reserves，which less than 10 m layer distance in Mugua mine of Lvliang，amounting to total reserves of 80%. So the rock microseismic study of under closed distance coal seam mining technology is of the important practical significance. The closed distance lower coal mining in Mugua mine，the technical problems were tunnel supporting of 109 working face and the reasonable width of coal pillar. Based on the microseismic monitoring theory，the in-situ monitoring method is used in the return airway strata break of time and space position，energy and microseismic distribution form characteristics with working face impelling，the 109 working face of mine pressure distribution rule and lateral strata break law and damage degree were determined. It provides scientific data with determining the reasonable coal pillar width，the closed distance of the coal resources realized safety and efficiency mining.
    Application of BMS Seismic Monitoring System in the Seabed Mining
    ZHANG Kai-Cheng
    2012, 41(06):  133-136. 
    Asbtract ( 1193 )   PDF  
    Related Articles | Metrics
    The composition and network layout of seismic monitoring system in Xinli mining area of Sanshandao gold mine was introduced. Based on the seismic event data processing，the analysis method was studied. According to the corresponding relationship of waveform and production activity，the waveform of detect events classification was studies. And it can ensure the recognition on time and the event classification preservation. Based on the quantitative earthquake parameters，especially the application of contours，regression curve and time variation curve and the corresponding relation，it provides a new method for forecasting the failure of underground mining tunnels and the pillar.
    Research Advances in the Ecosystem Services of the Reclaimed Mining Areas
    WANG Jing, WEI Zhong-Yi
    2012, 41(06):  137-141. 
    Asbtract ( 1172 )   PDF  
    Related Articles | Metrics
    Ecosystem service functions and its valuation around the world were reviewed in this paper. The conception and the characteristics of the ecosystem services in the reclaimed mining areas were proposed，and it classified service functions as product supplying，ecological regulating and cultural educating. Meanwhile，the research analyzed the problems in current research. For example，the research on formation mechanism of this ecosystem services，the evaluation theory and methods need to be improved，but the valuation is inaccurate. So the future research on this valuation should be focused on the theory exploration and method improvement，commencing with the microcosmic formation mechanism to carry out valuation research on different scales and types of ecosystem services in the reclaimed mining areas. By considering sufficiently the factors influencing its value，the means，method and technique of evaluation were improved，which make the results more comparative and practicable. It provides the theoretical basis and technical support for developing and utilizing mineral resources，and achieving the sustainable development of eco-mining.
    Application and Design to Emergency Evade Chamber
    BAI Chao-Xuan, ZHOU Xu, YANG Lu-Hai
    2012, 41(06):  142-144+148. 
    Asbtract ( 2208 )   PDF  
    Related Articles | Metrics
    The goaf, gas, explosion smoke, water and other dangerous hidden accidents frequently occur in mines. To avoid these fatal accidents, it has a very deep meaning to build the mine safety six systems.According to the Jianchaling Nickel Mine rock is broken, the stability is poor, the middle of the segmented, the hierarchical roadway longer features, underground hedge chamber construction in the vicinity of the haul road and ramp connections. The middle of the transportation roadway layout permanent hedge chamber, different hierarchical set up a temporary hedge chamber. Introduces the main points of the main project of the permanent and temporary hedge chamber and ancillary facilities and it also has some referential value to other mines which construct mine safety evade chamber..
    Study on the Surface Subsidence Rule in Roof Caving under Complex Conditions Based on UDEC
    ZHANG Guo-Quan, SHENG Jian-Long, SUN Ming-Wei, HAN Feng
    2012, 41(06):  145-148. 
    Asbtract ( 1236 )   PDF  
    Related Articles | Metrics
    The underground mining work by mining industry company is restricted by the surface subsidence of mining area，which is an  important factor. In mining process，looser rock mass gradually fill mined-out area and pass up to surface. Consequently，the structures and facility over the land were damaged. Taken east area in Jinshandian iron mine as an example，the UDEC was used to simulate the surface movement caused by the mining area of -130 m level or above and -270 m ore bodies excavation engineering in 2# ore body. The laws of surface were studied. It provides theories for following work.
    The Management System of Solid Waste for Mine Enterprise Based on GIS
    WANG Jin-Hua, LI Fu-Ping
    2012, 41(06):  149-151+164. 
    Asbtract ( 1475 )   PDF  
    Related Articles | Metrics
    Based on more than ten mines of Hebei Iron & Steel Group, the GIS component development model was chosen. Based on the spatial data, property data, management information of tailings, waste dump, concentrating mill, the management system of mine enterprise solid waste was designed. Visual management of solid waste's combination with chart was achieved. It also creates a new model by qualitatively or quantitatively analyzing solid waste data of multiple regions. And it provides a new information service for the management of tailing resource's exploitation and the evaluation decision of application prospects. 
    Reelection of Tailings after Flotation from Sijiaying Iron Mine
    ZHANG Qing-Feng, HAN Xiu-Li, ZHENG Wei-Min
    2012, 41(06):  152-155+164. 
    Asbtract ( 1450 )   PDF  
    Related Articles | Metrics
    According to the different properties of the flotation tailings from two concentrators of sijiaying iron mine, adopted different process to reelection. The results show that the flotation tailings from one concentrator by the process of grinding-middle intensity magnetic separation-reverse flotation can get the iron concentrate with yield 14.15%, iron grade 66.05%, recovery 52.21%, the other concentrator by the process of classification-grinding-high gradient high intensity magnetic separation-centrifugation for gravity concentration can get the iron concentrate with yield 12.64%, iron grade 63.53%, iron recovery 39.34%. The test results provide the scientific basis for improving the availability of resources and adding the economic benefits for enterprise.
    Hydration Characteristic of Cementitious Material of Steel Slag Concrete Used for Artificial Reefs
    WANG Zhong-Jie, NI Wen, GAO Shu-Jie, ZHU Li-Ping, QIAO Chun-Yu
    2012, 41(06):  156-159. 
    Asbtract ( 1403 )   PDF  
    Related Articles | Metrics
    An Artificial reef characterized by its high strength was prepared. Its cementitious material is composed of -0.088 mm steel slag stabilized by a hot-simmering method and blast furnace slag from Ansteel company; its fine and coarse aggregates are also steel slag stabilized by a hot-simmering method with sizes from 0.088 mm to 19 mm. By analyses of X-ray diffraction, field emission scanning electron microscope, differential thermal and infrared absorption spectrum for the hydration characteristic of the cementitious material, it can be found that a large amount of calcium silicate hydrate which mainly contributes to the early strength characterized by its low-alkalinity and a small amount of ettringte are both formed at early hydration stage. With the development of the hydration process, the calcium silicate hydrate and ettringite which is filling in the gaps of the hydration system are increasing continually. Therefore, the long-term strength can be improved by calcium silicate hydrate and ettringite. 
    Mechanism of Desulfurization of Direct Reduction Simultaneous Desulfurization of  Magnetic Concentrate from a Sulfur Tailing
    SUN Hao, SUN Ti-Chang, GAO 恩Xia, LIU Zhan-Hua, GUO Qian
    2012, 41(06):  160-164. 
    Asbtract ( 1249 )   PDF  
    Related Articles | Metrics
    Using the XRD and SEM method to analyze desulfurization mechanism of Huimin lignite and desulfurizer SH for low intensity magnetic concentrate with high sulphur concent of sulfur tailings in Inner Mongolia by using direct reduction roasting. The results show that the influence of reducing agent on the desulfurization has certain effect, the reason is that high temperature reduction atmosphere which formed by Huimin lignite can make pyrite and magnetic pyrite generating elemental sulfur and carbonyl sulfur in volatile gas state, metallic iron and troilite without magnetic, sulfur in volatile gas state and the grinding magnetic method to separate troilite and iron is the way to desulfurization. SH has promotion effect to the desulfurization. The mechanism is the desulfurizer SH and the pyrite and magnetic pyrite in direct reduction roasting process reacts iron and calcium sulfide without magnetic, through the grinding magnetic method to separate calcium sulfide and iron, so as to achieve the desulfurization target.