Showing 741 - 750 results of 750 for search '"coal mines"', query time: 0.06s Refine Results
  1. 741
  2. 742

    A Study on Axial Compression Performance of Large Diameter-Thickness Ratio Concrete-Filled Gas Drainage Steel Pipe by Zi-Lu Liu, Zhan-Guo Ma, Ye Li, Peng Gong, Ke-Long Li, Wang Liu

    Published 2021-01-01
    “…A large number of gas drainage pipes are obsoleted in the coal mine gas drainage system, and it causes serious waste. …”
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    Article
  3. 743

    Evolution Characteristics of a High-Level Asymmetric Fracture-Seepage Community and Precise Coalbed Methane Drainage Technology during Mining of Outburst-Prone Coal Seam Groups by Hongbing Wang, Zhiheng Cheng, Tie Li, Liang Chen, Quanle Zou, Shengli Yang, Jialin Cao

    Published 2021-01-01
    “…For these purposes, by taking Shaqu No. 1 Coal Mine (Lvliang City, Shanxi Province, China) as a research object, this research studied migration and caving characteristics of overlying strata by combining physical similar material simulation, numerical simulation, and field measurement. …”
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    Article
  4. 744

    Analysis of PM10 trends in open-pit mining: Assessing emission controls and WHO guideline compliance by Roberto Rojano, Heli A. Arregocés, Gloria Restrepo

    Published 2025-02-01
    “…This study evaluated the concentrations, trends, and variability of PM10 particulate matter in two Air Quality Monitoring Systems (CorpoGuajira's_AQMS and Cerrejón's_AQMS) in an open-pit coal mine in northeastern Colombia from 2010 to 2020. …”
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  5. 745

    Mine Flooding History of a Regional Below-Drainage Coalfield Dominated by Barrier Leakage (1970–2014) by Joseph J. Donovan, Eric F. Perry

    Published 2019-01-01
    “…A 44-year record of water level fluctuations in a series of adjacent closed underground mines documents the history of closure and mine flooding in the Fairmont Coalfield, one of the oldest coal mining districts in the Pittsburgh coal basin, West Virginia, USA. …”
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  6. 746
  7. 747

    Research on the evolution and prediction of the heights of water-conducting fracture zones in overlying rocks during layered mining of extremely thick coal seams by MENG Hailun, CHENG Xianggang, QIAO Wei

    Published 2024-12-01
    “…Based on the geological conditions of the extremely thick coal seams in the Jurassic coalfields of Xinjiang, this research selected the parameters of the typical working face 9-15 (08) in the Liuhuanggou Coal Mine of the Zhunnan Coalfield in Xinjiang, quantitatively evaluated the development characteristics and evolution patterns of the overlying rock fracture fields under layered full-mechanized mining of extremely thick coal seams through numerical simulations and fractal geometry theory analysis. …”
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  8. 748

    The study of mechanical properties and fracture evolution of coal-rock masses under hard roof-soft floor conditions by Jiajun Li, Yin Zhang, Chenchen Yang, Jiaqi Liu, Yu Zhou, Chunlin Li

    Published 2025-01-01
    “…Abstract As the depth of coal mining in China continues to increase, the fracturing of coal rock masses has an increasingly complex impact on the surrounding rock roadways. …”
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