极浅埋深井筒过强富水断层防治水技术研究

Research on Water Prevention and Control Technology of Ultra Shallow Well Bore with Strong Water-rich Fault

新维煤矿主井筒开掘至165~250m段揭露富水断层F175,井筒围岩软弱、裂隙发育,易引起河水倒灌及大量淋水对井筒稳定造成较大威胁。本文根据工程地质条件,提出采用架设矿工钢支架、背接金属网、超前注浆及喷浆封闭与二次模筑钢筋防水混凝土相结合的联合支护方法,完成过断层水患防治工作,达到理想效果,为同类井筒施工提供有益经验和借鉴。

The water-rich fault F175 is exposed from the main shaft to 165~250m in Xinwei Coal Mine.The surrounding rock is weak and the fractures are well developed.According to the engineering geological conditions,this paper puts forward the combined support method of pre-grouting,i-shaped steel frame,Steel Mesh,connecting bar and shotcreting,which combines the pr imar y support with the secondar y formwork reinforced waterproof concrete,the work of prevention and control of water disaster through fault is completed,and the ideal effect is achieved,which provides benef icial experience and reference for similar shaft construction.