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    15 February 2014, Volume 30 Issue 02
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    The Current Situation and Thinking of the Tin Ore Resources Development and Utilization All Over the World
    ZHANG Fu-Liang, YIN Teng-Fei, ZHOU Nan
    2014, 30(02):  1-4+10. 
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    The strategic value of tin resources is very important,besides that,the tin reserves all over world decline year by year in recent years.Therefore,many producer countries are faced with the predicament of subsequent resources replacement.The distribution characteristics of tin resources,changes of tin resources reserves,pure tin production and tendency of the tin market pattern all over the world are analyzed in depth.Especially,the current situation of the development and utilization of tin resources in our country is discussed in detail.In addition,some suggestions of the development and utilization of tin resources are given in line with the actual situation in our country.
    Application of the Deep Hole Blast Shaft Forming in Chambishi Copper Mine
    SHI Fa-Wu, LIU Xiao-Hui, WANG Yi-Ming, ZHANG Jin-Jun, HU Wen-Da
    2014, 30(02):  5-7. 
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    Sublevel subsequent filling with downward deep hole ore blasting mining method was used in 700~900ml in Chambishi Copper Mine. According to the construction of cutting shaft, the deep hole step blasting to form cutting shaft is put forward. Blast hole parameters,charging structure,denotation way are designed and calculated.The practical blasting effects show that,deep hole step blasting has perfect applicability in Chambishi copper mine.So,it can provide some reference for some relative engineering.
    Application of Sublevel Caving with Sill Pillar in Laochang Iron Mine
    DOU Guang-Wen, ZHANG Cheng-Ming
    2014, 30(02):  8-10. 
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    The 29-4 orebody is the first mining body of new district construction of Laochang branch of Yunnan Tin Company Limited.Trackless equipment is firstly used to ore removal and the rail transportation method is adopted to exploit in sublevel caving with sill pillar.According to the application results,the good production effects is obtained.In addition,in view of the in insufficient of the production process,some valuable improvement measures are taken.
    Application of Small Sublevel Open Stope method of Steeply Inclined Thin Veins
    ZHOU Xu
    2014, 30(02):  11-13. 
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    The shallow hole shrinkage method has the advantages of the structure of mining area,recovery process and equipment configuration are relatively simple,the ore can be conducted gravity haulage,the ore tonnage and grade can be adjusted easily,the cost is low,therefore,it is widely used to deal with the steeply inclined thin veins.However,disadvantages of the shallow hole shrinkage method such as low efficiency of mining,high dilution rate,poor operation safety conditions should be improved in time.The shallow hole shrinkage method is adopted to deal with the inclined thin veins in a lead and zinc silver mine,according to this practice engineering situation,research on the application of the small sublevel open stope method is done.The production capacity is ensured and loss rate of ore dilution is reduced by mining in many sublevels that are divided in line along the vein angle. Effect of the application results is good and provide some reference for the relative engineering practice.
    Ore Drawing Test of the Large Parameters of Dahongshan Iron Mine Phase II
    YU Zheng-Fang
    2014, 30(02):  14-16. 
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    Ore drawing is the core of Non-pillar sublevel caving. In order to ensure the cohesion of production process phase I and phase II of Dahongshan iron mine and meet the requirements of the large parameters recovery,the stoping indicators under the condition of all parameters combination and the best ore interval and route parameters are acquired by conducting of experiments of the large parameters ore drawing and monomer and three-dimension ore drawing.So,the test results can provide some basises of theoretical guidance for the actual production situation.
    Research on Failure Characteristics of the Overlying Strata of Full-mechanized Caving Mining of the Thick Coal Seam under Thick Unconsolidated Aquifer
    LI Jing-Jing, FANG Teng-Jiao, HUA Le, ZHAO Tao
    2014, 30(02):  17-19+24. 
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    In line with the geological situation,methods of analog simulation,numerical simulation,empirical formula and field measurement are adopted to do some research on the failure characteristics of overlying strata during the full-mechanized caving mining of thick coal seam under thick unconsolidated aquifer so as to obtain the height of the caving zone and fissure zone of the overlying strata.According to the contrast results,the results of the analog simulation and numerical simulation are close to the actual measurement data.However,the height value of fissure zone that is calculated by the empirical formula is lower than the actual value.So,13.5 meters and 68 meters are the hight value of the caving zone and fissure zone respectively.The above research results can provide some basises for designing and retaining of collapse prevention coal and rock pillars in mining area.
    Optimize the Flocculants for the Sulfur Concentrate Pulp by Using Steady Settlement Model
    WANG Cong-Fei, ZHANG Qin, WANG Yong-Long, TAO Hong
    2014, 30(02):  20-24. 
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    The influence of different flocculants on the settlement performance of sulfur concentrate pulp from Jinshandian iron mine was studied, and evaluates the effects of dosage，temperature. Settlement-Area Ratio of concentrated pool was calculated on different test conditions, and considered it as flocculating settlement characterization. The results have shown that all the flocculants can strengthen the settlement of sulfur concentrate, then the satisfied one 41216 was selected from many flocculants and it attained good application effect. With the increasing amount of flocculants, the Settlement-Area Ratio was decreased, and chosen 25 ℃ can do the best.
    Ca, Mg, Al, Si Content on the Sintering Process of Iron Ore from Xiang-steel
    WEN Xiao-Ping
    2014, 30(02):  25-28. 
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    In order to adapt to the requirements of Xiang-steel development strategic, reducing production costs, raw material contain iron for sintering was merged with some additional low-quality iron ore with low-grade, high aluminum and silicon content. In order to find a reasonable technology of mine merge, reducing disadvantage causing by sintering process and blast furnace smelting process, CaO, MgO, Al2O3, SiO2 content on various indicators during sintering was studied through sintering test by using on-site sintering raw material from Xiang-steel, which provide technical basis for reasonable mine merge of low-quality iron ore from Xiang-steel.
    Tests and Manufacture Practices of Recover Sulfide from a Copper Tailing in Qinghai
    HU Xiu-Mei, ZHENG Li-Qiang
    2014, 30(02):  29-32. 
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    In order to make full use of resources and reduce the impact of tailings emission on the environment, recovery of copper and sulfur from a copper tailing from Qinghai province, positive flotation tests under faintly acid and weakly alkaline conditions were conducted separately, and well separation index was achieved. Weakly alkaline condition was finally chosen for on-site process of recovery copper and sulfur from tailings and high quality of copper and sulfur was obtained.
    Comprehensive Recovery Test of a Copper-iron Ore from Xinjiang
    ZHU Guo-Qing, GUO Shun-Lei, WANG Feng-Shui
    2014, 30(02):  33-36. 
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    A copper-iron ore from Xinjiang Qiemo with iron grade of 50.92%, copper grade of 0.31%, sulfur content of 3.46%, desulfurization of iron concentrate and comprehensive recovery of copper and sulfur test was conducted in order to reduce sulfur content in iron concentrate and comprehensive recovery and utilize of copper and sulfur. According to comparison of the separation process, iron concentrate with 67.12%iron grade, 76.39% iron recovery, 0.26% sulfur grade, sulfur concentrate with 23.86% sulfur grade, 79.28% sulfur recovery, copper concentrate with 15.74% copper grade, 70.66% copper recovery was achieved by chosing combination of medication and first flotation and then magnetic separation process. Iron concentrate could reach the quality requirements and comprehensive utilization of this type of ores was achieved.
    Analysis on the Metallogenic Model and Geological Features of Maoling Gold Deposit in Liaoning Province
    YANG Hong-Zhi, CHEN Hong-Peng, LIU Chang-Chun, LV Jun-Chao , BI Zhong-Wei, XU Jia, ZHANG Sen, ZHAO Yan
    2014, 30(02):  37-43. 
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    Maoling gold deposit is discovered in 1980s,it is the oversize gold deposit in the rift valley of Liaoning and Jinning province,and the characteristics of the gold deposit is multi-stage,low grade and large reserves.The stratum of the gold deposit is belongs to Gaixian group of Paleoproterozoic liaohe group,besides that,the stratum of the gold deposit is the ore rock.The Mesozoic Wolongquan orebody and Maoling orebody are the main orebody in the mine area,and they are similar with each other.Wolongquan orebody has the close relationship with ore-forming.The mining structure is divided into Lvliang toughness-plastic structure and brittle fracture structure since the Mesozoic era.Maoling gold deposit can be divided into three metallogenic belts,Development of the first metallogenic belt that the No.9 orebody is located is best and the reserves of the first metallogenic belt is largest of all the metallogenic belts.Type of the ore-bearing hydrothermal is CO2+NaCl+H2O , and the chracteristics of the ore-bearing hydrothermal are low salinty,low degree of mineralization and acidity are analyzed by the analysis on S,Pb,H-O,C-O and ore primary fluid inclusions.According to the analysis results,the temperature of the ore-beraing hydrothemal is determined to 153~391 ℃,the ore-forming age is less than 192 Ma.Maoling gold deposit is regarded as the metamorphic tempreature veinlet disseminated type hydrothermal gold deposit,and the metallogenic model of it is summarized. Geological characteristics|Geochemical characteristics|Ore-bearing hydrothermal| Metallogenic model
    Governance of Aqueous Composite Super Soft Rock of Jurassic System of Heshituoluogai Mining Area in Sinkiang
    ZHANG Jian-Gong, LI Dong-Fa, WANG Jian-Jun
    2014, 30(02):  44-47+51. 
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    In order to deal with the stability control problem of aqueous composite super soft rock of Jurassic system of Heshituoluogai mining area in Sinkiang,taking the +550 m level bottom of Shajihai coal mine as an example,the coupling support system of constant resistence large deformation anchor rod(rop) is adopted and some new methods and approches are put forward to solve above problems in line with the analysis results of stability of surrounding rock in the mining area by using the methods of field observations,theoretical analysis and indoor test.According to the research results,perfect effects are acquired and it can provide some reference for the relative engineering practice in the future.
    Design of the Improvement of A Non-ferrous Metal Mine Ventilation System
    MA Cui-Lin
    2014, 30(02):  70-73+77. 
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    In order to make all the indexes of the ventilation system meet the requirements of “the metal non-metal mines safety regulation”,the design work of the improvement of a non-ferrous metal mine ventilation system is carried out from the perspective of the selection of the ventilating shaft and ventilation pattern,the calculation of the mine air and air pressure,the choice of model of the main fan and motor.According to the designing scheme,the air volume and air pressure can be adjusted by the ventilation structure and the short circuit and air leakage are controlled effectively.Therefore,the designing scheme of this paper can provide some reference for the ventilation system optimization improvement of some similar mines.
    Research on the Technique of Surrounding Rock Stability of Goaf
    FENG Fan, CHEN Dao-Zhi, HU Chao-Wen, ZHANG Yang-Yang
    2014, 30(02):  74-77. 
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    High density resistivity method is one of the most important techniques of exploration of goaf and underground water.Besides that,it is the one that is combined with the electric sounding and electrical section.Furthermore,it has the advantages of low cost,high efficiency,rich information,easy to explain and high precision.In view of the specific situation of a magnetite,the rock stability of underground goaf is detected and analyzed by adopting the high density resisitivity method.The sections are detected by using the Wenner Schlumberger device.Research of two-dimension inversion of the high density resisitivity datas are conducted effectively by combining with the Res2dinv software.According to the research results,it is concluded that,the stability of Underground surrounding rock is so good that there is no need to take some measures to fill the goaf.In addition,the factors that affect the accuracy of detection of the high density resistivity method are discussed in depth.
    Analysis on the Elastic and Plastic Values of Roadway Surround Based on the Correction Hoek-Brown Criteria
    PENG Rui, ZHAO Guang-Ming, MENG Xiang-Rui
    2014, 30(02):  78-80+89. 
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    The range of plastic zone and support deformation of the surrounding rock of roadway are obtained by combining with the derivation method of plastic solution of surrounding rock of roadway and the Hoek Brown strength criteria considering the intermediate principal stress.According to the results of the theoretical derivation,radius of plastic zone of surrounding rock of roadway and the expression of displacement are acquired.In addition,the plasticity index has the relationship with the initial two-dimensional compressive stress of surrounding rock,rock mass quality,parameters of geological engineering and the supporting reaction force.The Hoek-Brown strength criteria considering the intermediate principal stress has the qualification to analyze the plastic zone of surrounding rock of roadway so as to acquire more accurate results.Therefore,the above research results is conducive to the engineering practice.
    Blasting Design and Safety Measures of the Steep Slope in Open-pit Mine
    GU Hong-Jian, HUANG Kai-He, YI Hai-Bao
    2014, 30(02):  81-83. 
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    Taking the slope of a open-pit mine for instance,the blasting designing scheme of the steep slope under the complex environment,and the corresponding safety measures are taken at the same time.The harmful effects of blasting construction is controlled effectively.The damages of the rolling stones on the dwelling houses and farmland below the steep slope are voided validly.Besides that,good economics and social benefits are obtained.
    Research on the Influence of Pre-splitting Fissure to the Frequency of Blasting Vibration Signals
    LI Huan-Jun, QU Shi-Jie, LI Yan, QI Jia-Xiang
    2014, 30(02):  84-89. 
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    The data of pre-splitting blasting experiment and measured blasting vibration are used to analyze the change features of the blasting vibration signals of both sides of pre-splitting fissure from frequency domain at the basis of Pre-splitting blasting theory.The power spectrum and scale energy figure of blasting vibration signals of both sides of pre-splitting fissure are obtained by adopting the Fourier transform and continuous wavelet transform.According to the contrast results,the main frequency bands of high frequency component of the blasting vibration signals become wider,while the energy of low frequency component of the blasting vibration signals is attenuated sharply,besides that,the main frequency bands tend to develop to the high frequency component.
    Development method of the High Power Emulsion Explosive of Continuous Production
    WU Ben-Zhi, DUAN Jia-Rong, WANG Zi-Jun-
    2014, 30(02):  105-106+109. 
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    Development method of the high power emulsion explosive is described and Comparison of the formula and performance of the high power emulsin explosive and the ordinary emulsin explosive are conducted.According to the contrast results,cost of the high power emulsin explosive is low,besides that,due to the high power emulsin explosive do not contain the high explosive and aluminum power,so it can be produced safety.In addition,the high power emulsin explosive can be produced continuously,therefore,it has a broad application prospect.
    Experiment on the New Paste Filling Materials under the Shaft
    ZHANG Hai-Shan, YANG Xin-Hua, LI Jian-Peng, ZHAO Bo-Feng, ZHENG Huai-Jun
    2014, 30(02):  107-109. 
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    The slag power,plaster,clinker are mixed together with different proportion so as to do the experiment on the strength of paste block net pulp.The grade of slag cement strength is divided in line with the net pulp strength grade to conduct the experiment on the strength of blending the paste backfilling.The above experiment results proved that,the development of lead slag cement is feasible.However, due to the cementing activity of lead slag is weak,so,it is ideal that,part of the portland cement can be replaced with lead slag in the process of mine filling to improve the cementing activity of the mixed gelling materials,reduce the cost of mine filling and meet the requirement of mine filling strength.