深埋隧道内小净距地下洞室群钻爆开挖技术

结合云山隧道3#斜井地下风机房小洞室群的开挖施工,根据《爆破安全规程》中交通隧道安全振动速度标准的要求,施工中区别洞室断面大小与毗邻净距等因素,选用合理开挖顺序及施工方法,通过爆破振动监测和爆破参数优化确保既有洞室围岩稳定,探讨地下风机房小净距洞室群开挖减震控制措施。

Drilling and Blasting Excavation Technique on the Construction of Underground Small Spacing Cavern Group in Deep-depth Tunnel

This article, based on the excavation of cavern group of No. 3 underground inclined shaft ventilator room in Yunshan tunnel, according to the tunnel traffic vibration velocity safety standards in ＂blasting safety regulations＂ , as well as the distinction of the cavity profile size and adjacency distance and other factors, introduces the choice of reasonable excavation sequence and construction method, insurances of the stability of existing underground cavern surrounding rock through blasting vibration measurement and parameter optimization and investigate shock absorption measures on underground small spacing cavern group ventilator room excavation.