光面爆破在达康隧道双侧壁导坑法施工中的应用

Smooth blasting technology of double wall pilot tunnel method in the application of the Dakang tunnel construction

结合达康隧道在施工掘进过程中光面爆破技术在双侧壁导坑法的实际应用情况,分析了光面爆破的原理,并对光面爆破设计方案作了详细论述,有效控制了隧道的超欠挖,减少了爆破对围岩的扰动,加快了掘进速度,控制了施工成本,取得较理想的爆破效果。

Combining with the actual application situation of smooth blasting technology in double side drift method of Dakang tunnel in construction tunneling process,this paper analyzed the principle of smooth blasting,and described in detail the smooth blasting design scheme,effective control of the tunnel back break,decreased the disturbance of blasting to surrounding rock,speeding up the tunneling speed,control of the construction cost,obtained ideal blasting effect.