false roof是什么意思

网络释义

用法例句

The false top is that the existence pole exchanges weak caving rock stratum between the coal seam and direct top,In the coal mining,it may often happen.

通过对平岗煤矿5#煤在托伪顶回采时发生的局部冒顶事故原因的分析,提出了解决该问题的防治措施。

Kailuan Qianjiaying Coal Mine summarizes a suit of conjoint method of roof solidified and fore support,that settles problem of thick false top and creates finer economy benefit and society benefit in the process of production and practice.

开滦钱家营煤矿在生产实践中,总结了一套伪顶加固和超前支护相结合的方法,解决了伪板厚的问题,创造了好的经济效益和社会效益。