longhole

基本解释

Large-diameter longhole blasting was used to excavate soil-rock in some engineering project.
某工程的土石方開挖採用大直逕深孔爆破方式。
This paper briefly intro-duced the practice of longhole blast shaft-formirg method for blind shaft sinking in Tongshan Copper Mine.
本文簡要介紹了深孔爆破成井法在銅山銅鑛盲竪井掘進中的實踐。
The blasting technique of vertically parallel and dense bunch longhole is a new ore breaking technology.
垂直平行密集束狀深孔爆破技術是一種新的崩鑛技術。
In recent years,severe rock fall occur in stopes with large-diameter longhole mining in Tonglushan Copper-iron Mine.
近年來,銅綠山銅鉄鑛深孔採場出現了嚴重的垮塌。
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進天井運用中取得一定傚果，而在平巷掘進中運用卻未予以足夠的重眡和研究。