地下洞室采空区涌水段开挖施工方法

Excavation construction methods for water gushing section of underground caverns goaf

采空区涌水段开挖施工前先进行深孔超前探排水孔钻探,探明掌子面前方及洞顶的水量大小,排水后再进行掘进施工。以"先探后掘"、"管超前、短进尺、弱爆破、少扰动、强支护"为原则,进行隧洞的开挖支护施工。

Before the excavation construction for water gushing section of underground caverns goaf,deep holes should be drilled first to make preparations for drainage in advance,ascertaining water quantity in front of tunnel face and on the top of caverns,draining water and then conducting driving construction. The principle of ＂ prospecting first,then driving construction,casing ahead of time,short drilling footage,weak blasting,less disturbing,strong supporting＂ should be followed,proceeding the excavation construction of the tunnel.