【摘要】 介绍了岩巷施工中，中深孔定向断裂爆破的工艺过程，并将施工结果与中深孔光面爆破进行了分析比较，该技术不仅有其优越性，而且有显著的经济效益。更多还原

【Abstract】 It introduces the technological process of fractured directional blasting by holes in medium depth, and analyzes and compares the constructed results with that of the smooth - hole in medium depth blasting. This tech. has its advantage and remarkable economic benefits.更多还原