综采工作面沿空留巷支护技术研究应用

Research and Application of Support Technology for Retaining Roadway Along Goaf in Fully Mechanized Mining Face

为了保证1306工作面沿空留巷段的稳定,提出切顶卸压护巷技术,对留巷段采取“挡矸支架+柔模墙体+锚索+单体柱”联合支护。应用效果表明:切顶卸压后阻断了采空区应力向留巷段传递通道,实现了采空区顶板全部垮落;联合支护控制了留巷段围岩变形,防止了采空区矸石及气体向留巷空间涌入现象。

In order to ensure the stability of the 1306 working face retaining roadway along goaf section,the roof cutting and pressure relief roadway protection technology is proposed,and the retaining roadway section is supported by a combination of"gangue support+flexible formwork wall+anchor cable+single column".The application effect shows that after the roof cutting and pressure relief,the stress transmission channel from the goaf to the retaining roadway section is blocked,and the roof of the goaf is fully collapsed;The combined support controlled the deformation of the surrounding rock in the retaining roadway section,preventing the influx phenomenon of goaf gangue and gas into the retaining roadway space.