Permeability of the Coal Seam Floor Rock Mass in a Deep Mine Based on In-situ Water Injection Tests; Permeabilität des Kohlefözliegenden in einer Tiefbaugrube auf Basis von Injektionstests; Permeabilidad de la masa de roca del piso de la veta de carbón en una mina profunda basada en pruebas de inyección de agua in situ; 大采深矿井煤层底板渗透性现场注水试验;

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