Showing 141 - 160 results of 750 for search '"coal mines"', query time: 0.07s Refine Results
  1. 141

    Groundwater-Mixing Mechanism in a Multiaquifer System Based on Isotopic Tracing Theory: A Case Study in a Coal Mine District, China by Pinghua Huang, Xinyi Wang

    Published 2018-01-01
    “…Water inrush of mixed groundwater is the primary threat against safe production in coal mines. To study the mixing mechanism of a multiaquifer groundwater system, groundwater samples were collected from different strata in a typical North China-type coalfield (Chaochuan Coal Mine) and were then tested using environmental isotopes (18O, 2H, 3H, 13C, and 14C) and hydrochemical ions (Ca2+, Mg2+, Na+, K+, HCO3−, SO42−, and Cl−) as tracer agents. …”
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  2. 142
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    Coal Mine Gas Safety Evaluation Based on Adaptive Weighted Least Squares Support Vector Machine and Improved Dempster–Shafer Evidence Theory by Zhenming Sun, Dong Li

    Published 2020-01-01
    “…Gas safety evaluation has always been vital for coal mine safety management. To enhance the accuracy of coal mine gas safety evaluation results, a new gas safety evaluation model is proposed based on the adaptive weighted least squares support vector machine (AWLS-SVM) and improved Dempster–Shafer (D-S) evidence theory. …”
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  4. 144
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    Experimental Study on Comprehensive Real-Time Methods to Determine Geological Condition of Rock Mass along the Boreholes while Drilling in Underground Coal Mines by Ganggang Niu, Kai Zhang, Bosong Yu, Yanlong Chen, Yu Wu, Jiangfeng Liu

    Published 2019-01-01
    “…The geological condition is essential for mining design and disaster control in underground coal mines. The present research focuses on the real-time assessment method on rock mass condition during drilling boreholes. …”
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  6. 146

    Kinetic Column Evaluation of Potential Construction Options for Lessening Solute Mobility in Backfill Aquifers in Restored Coal Mine Pits, Powder River Basin, USA by Jeff B. Langman, Julianna Martin

    Published 2025-01-01
    “…Following open-pit coal mining in the Powder River Basin, landscape reconstruction includes the construction of backfill aquifers from overburden waste rock. …”
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    Research of Roof Anchorage Rock Beam Bearing Structure Model of Extra-Large Width Open-Off Cut and Its Engineering Application in a Coal Mine, China by Shengrong Xie, Qing Zhang, Dongdong Chen, En Wang, Junchao Zeng, Chunwei Ji, Xiaoyu Wu, Zaisheng Jiang, Feng Chen, Shunxing Qiao

    Published 2020-01-01
    “…In this study, a numerical model was built with FLAC3D for analyzing the characteristics of the effective prestressed field distribution in the extra-large width open-off cut roof in Xingdong coal mine, China. The numerical results obtained in this study demonstrate that an anchorage rock beam bearing structure (ARBBS) can be formed. …”
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  12. 152

    Formation Mechanism and the Height of the Water-Conducting Fractured Zone Induced by Middle Deep Coal Seam Mining in a Sandy Region: A Case Study from the Xiaobaodang Coal Mine by Xiaoshen Xie, Enke Hou, Shuangming Wang, Xueyang Sun, Pengfei Hou, Shibin Wang, Yongli Xie, Yongan Huang

    Published 2021-01-01
    “…The height of the water-conducting fractured zone (WCFZ) is a basic parameter related to water protection in coal mines and is also crucial for aquifer protection and mine safety. …”
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  13. 153
  14. 154

    Study on Fracture and Stress Evolution Characteristics of Ultra-Thick Hard Sandstone Roof in the Fully Mechanized Mining Face with Large Mining Height: A Case Study of Xiaojihan Coal Mine in Western China by Feng Ju, Meng Xiao, Zequan He, Pai Ning, Peng Huang

    Published 2018-01-01
    “…In this paper, the typical ultra-thick hard sandstone roof of the Xiaojihan coal mine was taken as an example. The structural and chemical composition characteristics were analyzed. …”
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