longhole

基本解释

Large-diameter longhole blasting was used to excavate soil-rock in some engineering project.
某工程的土石方开挖采用大直径深孔爆破方式。
This paper briefly intro-duced the practice of longhole blast shaft-formirg method for blind shaft sinking in Tongshan Copper Mine.
本文简要介绍了深孔爆破成井法在铜山铜矿盲竖井掘进中的实践。
The blasting technique of vertically parallel and dense bunch longhole is a new ore breaking technology.
垂直平行密集束状深孔爆破技术是一种新的崩矿技术。
In recent years,severe rock fall occur in stopes with large-diameter longhole mining in Tonglushan Copper-iron Mine.
近年来,铜绿山铜铁矿深孔采场出现了严重的垮塌。
The sectional cutting method is effectively applied to longhole raising but less applied to tunnel heading.
分段掏槽法已在深孔爆破掘进天井运用中取得一定效果，而在平巷掘进中运用却未予以足够的重视和研究。