Guizhou Wenjiaba Mining Industry Co.

以文家坝一矿6号煤层为背景,通过理论分析、数值模拟分析地应力最大主应力水平时地应力方向对缓倾斜煤岩层中巷道围岩的变形特征的影响规律和机制。结果表明,地应力最大主应力水平且垂直巷道时,倾斜煤岩层内沿倾斜层面的应力诱导效应被增强,地应力分布对巷道变形控制不利,即增大巷道水平收敛变形,加剧底、顶板内水平应力集中。

Taking the 6th coal seam of Wenjiaba No.1 Mine as the background, through theoretical analysis and numerical simulation, the influence and mechanism of the direction of geostress on the deformation characteristics of roadway surrounding rock in gently inclined coal layers at the maximum principal stress level are analyzed. The results show that when the maximum principal stress of geostress is horizontal and vertical to the roadway, the stress inductive effect along the inclined plane in the inclined coal rock layer is enhanced, and the distribution of geostress is unfavorable to the deformation control of the roadway, that is, increasing the horizontal convergence deformation of the roadway and exacerbating the horizontal stress concentration in the floor and roof.