小断面水利勘探平硐爆破掘进技术

在环境复杂的小断面水利勘探平硐爆破施工中,为充分利用机械设备,降低爆破成本,在确定炮孔深度的情况下,通过对掏槽孔方式及布孔孔数、断面布孔位置及布孔总数、起爆技术等多项技术的多次施工试验,总结出一种适合小断面坚硬岩平硐掘进的爆破方法。工程施工表明,该方案取得了较高的炮孔利用率和掘进速度,带来了较好的爆破效果和经济效益。

Blasting excavation technology of small section water exploration adit

In order to make full use of mechanical equipment and reduce blasting cost of small section water exploration adit blasting construction in complex environment,the depth of hole was determination,the repeated construction test of cutting mode and hole number,section hole arrangement position,the total number of holes and blasting technology were taken.The blasting method suitable for small section of hard rock tunnel excavation was summarized.The construction showed the scheme could reach high hole utilization ratio and excavation speed that brought very good blasting effect and economic benefit.