“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	Sir Gawain and the Green Knight Sir Geoffrey Rudolph Elton Sir Geoffrey Wilkinson Sir George Cayley Sir Halford John Mackinder Sir Hans Wolfgang Singer Sir Harold Walter Kroto Sir Henry Cliffard Darby Sir Herbert Butterfield Sir Hersch Lauterpacht Sir Hiram Stevens Maxim Sir Humphry Davy Sirian companion siriometer Sir Isaac Newton Sirius Sirius satellites Sir J.J. School of Art,Bombay Sir John Hubert Marshall Sir John Soane's Museum Sir John Warcup Cornforth Sirkka Turkka Sir Louis-Hippolyte LaFontaine SIR man-machine dialogue system Sir Martin Ryle

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