42206工作面切顶卸压沿空留巷技术应用

Application of Pressure Relief by Roof Cutting in Gob-side Entry Retaining at 42206Working Face

为解决当前矿井采掘衔接紧张问题,以西铭矿42206工作面现场条件为基础,对坚硬顶板工作面沿空留巷巷旁充填体承载机理进行分析,提出采用切顶卸压方法对坚硬顶板载荷进行卸压,并设计了沿空留巷与巷内补强支护方案。根据现场试验结果,采用该方案后成功留巷700 m,42206工作面回采后,沿空留巷巷道围岩稳定,未出现剧烈矿压现象,表明该方案可行。

In order to solve the problem of the current tight connection between mining and excavation at 42206 working face of Ximing Colliery,the author proposes the method of pressure relief by roof cutting to relieve the load of the hard roof by analysis of the bearing mechanism of the filling body next to the gob-side entry retaining at hard-roof working face,together with the design of reinforcement support plan of the gob-side entry retaining,whose field test results show that the scheme has a certain feasibility with 700 m roadway retained,stable surrounding rock and no severe rock pressure phenomenon.