关键词: 坚硬顶板, 链臂锯, 切顶卸压, 围岩应力

Abstract: In order to solve the problem of difficulty in controlling the surrounding rock of the roadway along the goaf in the third panel of Tashan Coal Mine of Datong Coal Mine Group, Datong Coal Mine Group has developed the chain-saw cutting roof pressure relief technology. In this paper, the application effect of pressure relieasing with chain-saw is studied in the field. The research shows that as the mining of the 8311 working face advances, the coal pillar and coal body deep stress in roadway 2312. It shows the form of increasing first, then decreasing, and finally stabilizing, and the peak stress of the surrounding rock in the test section of the chain-saw joint is generally smaller than that of the test section without the roof cutting operation, indicating that the pressure relief effect of the chain-saw cutting roof is good. The research in this article has guiding significance for the popularization and application of cutting roof and pressure relief with chain-saw.