光面爆破在引水隧洞工程施工中的应用

Application of smooth blasting in construction of diversion tunnel

本文以辽西北供水工程为背景,分析了工程所在地的地质条件,因开挖段岩石裂隙发育,自稳能力差,硐室爆破等大药量爆破方式会对洞线周围岩体造成过大扰动,不利于安全生产管理,故决定采用光面爆破方法进行施工。遵循“弱爆破、短开挖、强支护、早闭合、勤量测”的原则,对爆破施工参数进行设计,不仅保证了施工安全,同时也加快了施工进度。对现今隧洞爆破施工作业具有一定借鉴意义。

Based on the background of water diversion project in western Liaoning Province,this paper first analyzes the geological conditions of the project site.Due to the development of rock fissures in the excavation section,poor self stability ability,chamber blasting and other large explosive blasting methods will cause excessive disturbance to the surrounding rock mass around the tunnel line,which is not conducive to safety production management,so smooth blasting method is adopted for construction.According to the principle of“weak blasting,short excavation,strong support,early closure and frequent measurement”,the blasting construction parameters are designed,which not only ensures the construction safety,but also speeds uPthe construction progress.It has a certain reference significance for the present tunnel blasting construction.