公路隧道周边眼聚能水压爆破技术应用

Polymeric hydraulic blasting technology application in periphery holes in highway tunnel construction

结合陈家山隧道Ⅲ级围岩掘进工程,对周边眼采用聚能水压爆破实践,对比了周边眼聚能水压爆破与传统光面爆破的差异,指出相比较于光面爆破,聚能水压爆破能够节约炸药量11%,炮眼留存率显著提高,进而实现了减少超挖,降低成本的目标。

Combining with the Grade III surrounding rock driving along Chenjiashan Tunnel,the paper adopts the accumulated water-pressure blasting of periphery holes,compares the differences in the accumulated water-pressure blasting of periphery holes,indicates the accumulated water-pressure blasting can save 11% of the powder in comparison with the smooth blasting,and the perforation retention is obviously improved,so as to realize the reduction of overbreak and lower the cost.