无切巷无切井一次爆破拉槽法

Cutting—in Method for First Blast Without Cutting—Drift and Cutting—Raise

本文较详细地叙述了无切巷无切井一次爆破拉槽法的方案和施爆工艺,解决了矿体上盘围岩破碎掘凿切割巷道困难的难题,取得了显著的经济效益。

This paper made a more exhaustive review for the schemes of first blast cutting-in method without cutting-drift and cutting-raise, and it's blasting technology. It solved the questions of driving cutting-drift in the broken surrounding-rock zone of the top wall, and gained obvious economic benefit.