“roof fall”的概念、定义、翻译、参考文献-科学参考

单词	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。
随便看	inchplant incidence incidence algebra incidence angle incidence axiom incidence axioms incidence calculus incidence coefficient incidence condition incidence correspondence incidence curve incidence density incidence formula incidence geometry incidence graph incidence group incidence mapping incidence matrix incidence matrix of a block design incidence matrix of a graph incidence number incidence pair incidence-preserving map incidence-preserving mapping incidence rate

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