巷道全断面开挖法中爆破技术参数的确定

Blasting parameter determination of tunnel full-face excavation

三桥大沟矿区水泥用灰岩矿巷道掘进采用全断面开挖法,对爆破方案、炮孔布置、单孔装药量、起爆网络等技术参数进行了阐述和计算。此法保证了整个巷道壁稳定、轮廓线平顺光滑,达到了巷道掘进的循环进尺要求,取得了较好的效果。

The full-face excavation method was used in roadway driving of Sanqiao Dagou limestone mining area.The blasting scheme,holes arrangement,single-hole charge,detonating network were expounded and calculated.These parameters ensured the tunnel well stable,contour line smooth.The roadway driving met the requirement of cyclic advance,and it got good effect.