巷道掘进过导水断层水害防治技术研究

Study on the prevention and control technology of water damage of tunnel driving through water conducting fault

为了确保巷道掘进安全,在回风大巷掘进过DF21导水断层时,在充分分析断层导水性以及产状参数基础上,制定底板注浆封堵、止水帷幕封堵等防治水措施。回风大巷在掘进过DF21断层期间,仅顶板有少量淋水,确保了巷道掘进安全。现场应用表明,在巷道过导水断层时,采用注浆技术可以有效对断层导水通道进行封堵,并提高巷道围岩强度,注浆封堵导水通道方案可以满足巷道过导水断层需要。

In order to ensure the safety of tunnel driving,when the return air roadway is driving through the DF21 water conducting fault,based on the full analysis of the water conducting property and occurrence parameters of the fault,the prevention and control measures such as bottom plate grouting and sealing curtain are formulated.During driving through DF21 fault,only a small amount of water is poured into the roof of return air roadway,which ensures the safety of driving.The field application shows that the grouting technology can effectively block the fault water channel and improve the strength of the surrounding rock of the tunnel when the tunnel passes through the water guide fault,the scheme of grouting to block the water channel can meet the needs of the tunnel water guide fault.