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    Failure and development height of overlying rock of a water flowing fracture in goaf under a karst aquifer by Lulin Zheng, Xiong Liu, Qing Qiu, Youwen Tian, Weide Ren, Jin Xu, Xiaokun Wang

    Published 2025-01-01
    “…This study focuses on the Longfeng Coal Mine, northern Guizhou coalfield. Samples of rock from the roof coal seam were obtained by drilling and coring and examined under a scanning electron microscope. …”
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