关键词: 平巷掘进, 掏槽方法, 爆破参数, 爆破效果

Abstract: In view of low efficiency in Tunneling and cutting of the limestone drift of Yangmei minmetals，the cutting blasting effect theory is used to analyze the problems existing in drift excavation. Then，combining with the literature and the actual engineering，the reasonable blasting parameters are determined. Finally，the comparative analysis on the blasting effects performed in homogeneous limestone drift with three cutting patterns of the rhombus cut，the single helix cut and the triangle cut are made. The conclusion is that the single helix cut blasting technique in homogeneous limestone drift excavation in Yangmei Minmetals realized the efficiency of borehole up to above 90% and reduced the hole number and the unit consumption of explosive to be a reasonable level.

Key words: Drift excavation, Cutting method, Blasting parameter, Blasting effect