掘进巷道过断层补强支护围岩稳定性研究

Study on the stability of surrounding rock for the excavation roadway over fault reinforcement

为了解决中能煤业1308回风顺槽掘进时受断层影响变形大的问题,本文采用理论分析和现场实测相结合的方法,对巷道过断面的受力形式及支护进行了分析,提出了利用U型钢支架及复喷砼对原有的支护进行补强的加强支护形式。实测结果表明,采用加强支护后的巷道围岩表面位移量较小,巷道较稳定性,为安全开采提供了保证。

In order to solve the problem of large deformation under the influence of fault during 1308 return air tunneling in zhongneng coal industry, this paper analyzes the force form and support of roadway over section by theoretical analysis and field measurement, and proposed a strengthened support which is using U-shaped steel support and respraying concrete to reinforce the original support. The actual measurement results show that the surface displacement of the surrounding rock of the tunnel after strengthening support is small, and the tunnel is relatively stable, which provides a guarantee for safe mining.