roof fall

常見例句

Thin rock strata of roof fall by full thick, procreant cranny reach the earth's surface and have clearly sidesteppedsubsidence.
在回采過程中，工作面礦壓顯現(xiàn)比較明顯，頂板基巖沿全厚切落，產(chǎn)生的裂隙通達(dá)地表并有明顯的臺階下沉。
Many problems existed when the original shallow hole shrinkage method was used in Gaobaoshan Gold Mine, roof fall in particular, because of the complex geology of its mining area.
高寶山金礦礦區(qū)地質(zhì)復(fù)雜，原有淺孔留礦法在生產(chǎn)中存在較多問題，特別是頂板塌落。
Based on the local, migratory and subsection characteristics of main roof fall of longwall face, the main roof was divided into some plate group, and plate group mechanical model was established.
針對長壁工作面頂板垮落具有局部、分段、遷移的時空特征，將長壁工作面采場頂板劃分成若干個相互鉸接的薄板，建立了薄板組力學(xué)模型。

But it sure can dish up some compensating amusement while we wait for the roof to fall in.
FORBES: Chronicling The Decline And Fall Of Entitlement Democracy
Biologists are still running modelling experiments to determine whether to save the Wedgwood or leaded crystal as the house smoulders and timbers fall from the roof.
ECONOMIST: Green.view: Finger on the spot The
Partly because of his stammer, brought on by a fall through a roof as a lad, and partly because people from Hesket didn't talk too much as a rule, he didn't care to meet strangers.
ECONOMIST: Edward Stobart