关键词: 超欠挖, 光面爆破, 控制图法

Abstract: In consideration of the changeable geological condition and mechanical peoperty of adjoining rock, tunnelling progress is always out of complete, control and regarded as a dynamical performance, wkich can therefore only be dealt with by some dynamical control method. Taking ××× Tunnel on Chengdu-Chongqing Highway being constructed in Sichuan Province as an example, this paper presents the control chart method in tunnel excavation, a good method for reducing over-and-under excavation effectively and attain better effect of smooth wall blasting, by adopting the control chart method of Japanese Totle Quality Control Method to thoroughly control tunnel construction which is conducted by drilling-and-blasting method. This method is applicable to the construction of mountain tunnels and underground caves.

Key words: over-and-under excavation, smooth wall blasting, control chare method