关键词: 强富水含水层, 弱胶结, 巷道掘进, 长距离定向钻探, 注浆加固

Abstract: In order to solve the problem of water disaster prevention and control, tunnel support during tunnel excavation under the water-abandence and weak cementation aquifer, long distance directional drilling technology was used to prospect the water yield property and drainage the water from aquifer. For the area with thin aquiclude, drilling and anchor bolt grouting was used to the roof aquifer reinforcement and reconstuction. For the area that tunnel roof is broken, U-shape steel shed was used to strengthen tunnel support. Though the practiceal verification, the water flow have significantly reduced after the comprehensive prevention and control technology for tunnel excavation, and the water disaster and roof accident were avoided. The prospecting and drainage of tunnel water filling source with long distance directional drilling, water-conductive channel sealing with drilling and anchor bolt grouting, cooperate with U-shape steel shed and tunnel support with U-shape steel shed can be ensure the safety of tunnel excavation under the complex hydrogeological condition.