西固煤业回风立井涌水分析及对策措施

Analysis on gushing water of reture air shaft and tunneling technology in Xigu Coal Mine

分析了西固煤业回风立井掘进中涌水特征及涌水原因，针对掘进遇到的流砂层、砂砾石层水文地质情况，采用壁后注浆硬化井壁、掘进工作面止缓式预注浆的堵水施工技术，解决了该井筒穿过第四系涌水流砂层的施工难题。

The characteristics and the causes of gushing water of reture air shaft in tunneling in Xigu Coal company are analyzed. The technology of wall grouting hardening and water shut - off construction of slow - type grouting tunneling is used to the problems such as quicksand layer in tunneling and sand gravel layer. The difficult problem has been solved that the shaft goes through the fourth gushing water quicksand layer.