“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	block ideal block impurity band infrared detector blocking blocking coefficient blocking effect blocking filter blocking-generator Blocking Hands blocking high blocking network blocking of compressor blocking of indicator blocking oscillator blocking project in ancient China blocking receive blocking sand-barrier blocking set blocking-tube oscillator blocking-up blocking view block in replication block iteration block iteration method block-layer block length

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