岩石平巷 hard heading
- 一般情况下,在岩石平巷掘进工作面的涌水中,在多台凿岩机集中打眼之前,固体颗粒含量最少。
Under normal circumstances, Drifting in the rock face of the gushing water, in the concentration of multiple drill rock drill before the solids content of at least. - 本文在总结先拱后墙平巷掘进经验的基础上,根据岩石力学理论和平巷掘进原理,提出了平巷掘进的悬拱法。
Based on the theory of rock mechanics and the principle of drifting, the author proposed the suspension arch method of drifting in unstable strata. - 岩石开挖后无支护而且安全的时间长度,即拱桥作用的时间,对于整个平巷掘进工艺循环有着很大的影响。
The length of time the rock safely can be left unsupported will greatly effect the overall drifting-operation cycle.
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