预裂爆破在软岩路基开挖中的应用

The Application of Pre-splitting Blast in Excavation of Road Fou ndation in Soft Rock

西康线小河站区段岩石松软破碎 ,为确保边坡的稳定性 ,在其路基开挖中采用了预裂爆破技术。施工中采用不耦合装药和空气间隔装药 ,取得了较理想的爆破效果 ,其经验可供在类似条件下进行预裂爆破时参考。

The rock mass in the xiaohe station section of Xikang Ra ilroad line is fair soft and broken.In the excavation of road foundation,pre-sp litting blast technique was used to ensure the stability of slopes,uncoupled cha rging and air-deck charging were adopted in operation so as to achieve reasonabl e blasting results.The experience can be used for reference in per-splittin g blasting under similar circumstances.