不连沟煤矿特厚煤层综放面采空区自燃"三带"分布规律
불련구매광특후매층종방면채공구자연"삼대"분포규률
Distribution Law of Spontaneous Combustion "Three Zone" in Goaf of Fully Mechanized Top Coal Caving Mining Face in Ultra Thick Seam of Buliangou Mine
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