扩底空腔掏槽爆破的试验研究

Fxperimentai Research of the Hole Bottom—Enlarged Cavity Blasting for Cut

本文阐述了在中硬或极坚硬矿岩的平巷掘进中应用扩底空腔掏槽爆破技术,能确保将爆破效率提高到90％以上,从而加快循环进尺,经济效益显著。

The paper describes that the hole bottom—enlarged cavity blasting for cut, when used in drifting in medium hard or very hard rock, can be sure to raise the blasting efficiency up to over 90%. As a result, the advance per round is accelerated and remarkable economical benefits are achieved.