光面爆破技术在紫木凼金矿主平巷掘进中的应用

摘要

The application of smooth blasting in the excavation of main drift in Zimudang Gold Mine obtained an outline that basically agrees with design requirements with insufficient excavation not more than 0 .3 m and excessive excavation not more than 0.5 m.Due to the tatter structure of loose rock bodies after blasting,trace of semi-hole is hard to remain in the drift walls and there are no big loose rocks; trace of semi-hole can be found in medium-sized rocks and there are few,if any loose rocks.Compared to ordinary blasting,smooth blasting makes mitigated wallrock disturbances.%将光面爆破技术应用于紫木凼金矿主巷掘进爆破施工中,应用结果表明,开挖轮廓尺寸基本符合设计要求,欠挖不大于0.3 m,超挖不大于0.5 m;爆破后由于松软岩体破碎结构,巷道帮壁上较难保留半孔痕迹,但无大的危岩浮石;中等岩石存在半孔痕迹,无危岩浮石或很少危岩浮石.与普通爆破相比,围岩扰动减小,效果明显.