Showing 781 - 800 results of 954 for search '"Coal mining"', query time: 0.05s Refine Results
  1. 781

    “Relief-Retaining” Control Technology of Floor Heave in Mining Roadway with Soft Rock: A Case Study by Ai Chen, Xuebin Li, Xuesheng Liu, Yunliang Tan, Ke Xu, Honglei Wang

    Published 2021-01-01
    “…The return airway of no. 130203 working face in Zaoquan Coal Mine of Ningdong Mining Area in Northwest China is the research object in this study. …”
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  2. 782

    The Study on Large-Diameter Drilling Prevention Method of Rock Burst in the Xinxing Coal by Gao Xu, Zuo Minghui, Shu Yanmin

    Published 2021-01-01
    “…Based on the engineering background, the 41051 working face of the 65th coal mine in Qitaihe Xinxing Mine was regarded as the engineering background, by using of the comprehensive research methods such as theoretical analysis and calculation, FLAC3D numerical simulation, physical parameters of coal and rock in laboratory, and the field industrial measurement, to research on the large drilling relieving rock burst mechanism and parameter setting in reasonable. …”
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  3. 783

    Experimental Research on Performance of New Gas Drainage Borehole Sealing Material with High Fluidity by Xin Guo, Sheng Xue, Chunshan Zheng, Yaobin Li

    Published 2021-01-01
    “…To ensure the sealing effect of gas extraction borehole in underground coal mine and improve the concentration of gas extraction, a kind of high-flow sealing material which can be injected into the microcracks around borehole was developed. …”
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  4. 784

    Stability Mechanism and Control Factors on Equipment Removal Area under “Goaf-Roof-Coal” Structure by Zhongshun Chen, Yong Yuan, Cheng Zhu, Wenmiao Wang

    Published 2021-01-01
    “…In order to solve this problem, the stability mechanism and its control factors during the LM equipment removal were investigated by using comprehensive methods including theoretical analysis, numerical simulation, and field validation based on the working conditions of Panel 31102 in Liangshuijing Coal Mine. The numerical simulations demonstrate that four different failure zones, shear failure zone, tension failure zone, partly elastic zone, and plastic failure zone, appear around the area due to the position of rock and the arrangements of the supports. …”
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  5. 785

    Cutting-Caving Ratio Optimization of Fully Mechanized Caving Mining with Large Mining Height of Extremely Thick Coal Seam by Kai Wang, Tong Zhao, Kaan Yetilmezsoy, Xiaoqiang Zhang

    Published 2019-01-01
    “…Engineering application showed that the optimal cutting height of Xiegou Coal Mine was 4 m, the cutting-caving ratio was 1 : 2.75, and the recovery rate could reach more than 85%, which was the most reasonable.…”
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  6. 786

    Prevention Technology for Strong Mine Pressure Disaster in the Hard-Roof Large-Mining-Height Working Face by Hongfei Duan, Lijuan Zhao

    Published 2020-01-01
    “…Considering Tongxin Coal Mine as the engineering background, the stress distribution law of the surrounding rock and the overburden rock damage characteristics of a large-mining-height working face under the hard roof were investigated. …”
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  7. 787

    The Study of Key Stratum Location and Characteristics on the Mining of Extremely Thick Coal Seam under Goaf by Gaochuan Guo, Yongkang Yang

    Published 2021-01-01
    “…This method was used to determine the position of interlayer key stratum of overlying strata in Xiegou coal mine. And the results agree with that of the engineering practice. …”
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  11. 791

    Risk Prediction Algorithm of Social Security Fund Operation Based on RBF Neural Network by Linxuan Yang

    Published 2021-01-01
    “…On this basis, the prediction model based on the improved ANT colony-RBF neural network is established, and the MATLAB software calculation tool is used for accurate calculation, which makes the prediction results of coal mine safety risk more accurate and provides more reliable decision basis for decision makers. …”
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  12. 792
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  18. 798

    Numerical Simulation of Mechanical Characteristics of Roadway Surrounding Rock under Dynamic and Static Loading by Ce Jia, Sheng Li, Chaojun Fan, Jinbao Tang

    Published 2021-01-01
    “…In this study, the 2802 transportation roadway in Zhangcun Coal Mine is selected as the engineering background. …”
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  19. 799

    Parameter Optimization of Constant Pressure Grouting Technology for Borehole Sealing with Inorganic Noncondensable Material in Tectonic Coalbed of South China by Zhao Pengtao, Wang Haiqiao, Wang Long, Wang Xinlei, Ma Hongyu

    Published 2023-01-01
    “…Adopting the constant pressure grouting technology with the slurry, the average drainage concentration of boreholes in Puxi coal mine is 51.5%, and the average gas flow rate is 0.005 m3/min, which are 1.35 times and 1.67 times than those with the cement grouting method.…”
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  20. 800

    Prediction of Compressive Strength of Geopolymer Concrete Based on Support Vector Machine and Modified Cuckoo Algorithm by Daming Zhang, Fangjin Sun, Tiantian Liu

    Published 2021-01-01
    “…Coal gangue-based geopolymer concrete is an environmentally friendly material made from coal gangue, solid waste from the coal mine. Compressive strength is one of the most important indexes for concretes. …”
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