采空區落頂 的英文怎麼說
中文拼音 [cǎikōngqūlàdǐng]
采空區落頂
英文
gob caving-
The results of numerical analysis on mined - out area indicate that the roof at mined - out areas is unstable and the rock in the roof is easy to collapse in this mine
數值分析結果表明:夾溝礦采空區的頂板是不穩定的,頂板巖體容易發生垮落事故。
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