采用预留光爆层进行二次爆破的技术在石质边坡开挖中的应用

在石质边坡的开挖中,采用预留光爆层进行二次爆破的技术进行爆破施工,可以达到两种良好的施工效果:一是减少路堑边坡及路堑基床下部岩石的爆破松动,从而降低爆破作业对石质边坡稳定性的破坏;二是提高开挖边坡的平顺性,减少超欠挖,从而降低施工难度,提高施工进度。

In the excavation of stone slope, two good construction results can be achieved by using the technique of reserved smooth blasting layer for secondary blasting. One is to reduce the blasting loosening of the cutting slope and the rock in the lower part of the cutting bed. The second is to improve the smoothness of the excavated slope, reduce the over-underexcavation, reduce the construction diff iculty and improve the construction schedule.