Reducing vibration of the rock and safety effectively to apply "the guide hole" in smooth blasting. New equilibrium of rock can be achieved to apply bolting and shotcreting support. The rock is controlled successfully for application of "the guide hole" in smooth blasting and bolting or shotcrcting support in Mollasadra the water tunnel intake excavation,which would have a certain reference value to the same project.%采用加“导向孔”的光面爆破可有效地送减少围岩振动,降低了安全隐患.采用喷锚支护技术开挖和支护同时进行可使围岩尽快达到新的应力平衡.莫拉萨德拉引水隧洞进水口段开挖施工采用有“导向孔”的光面爆破和洞口开挖的喷锚支护成功地控制了围岩,对类似的隧洞施工提供了借鉴.
展开▼
