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roof fall
释义
roof fall
Encyclopedia
工学
岩石地下工程灾害
释
roof fall
冒顶
矿井、隧道(洞)开挖时,采掘作业面或巷道的顶板在矿山压力作用下变形、破坏而脱落,造成顶部大面积垮塌的现象。
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