梯形断面巷道围岩破坏机理浅析

Analysis on the failure mechanism of surrounding rock of trapezoidal cross-section roadway

为了分析3206轨道顺槽梯形巷道两帮片帮原因,在假设巷道测压系数为1的情况下,借助弹性力学建立数学分析模型,分析了巷道高帮及低帮侧塑性区随巷道埋深的变化规律。研究结果表明:巷道高帮塑性区随着煤层倾角的增大逐渐增大,高帮塑性区范围大于低帮塑性区范围等规律,为指导巷道支护提供参考。

In order to analyze two walls caving reason of the trapezoid cross-section roadway of the 3206 rail cross heading, on the assumption that the roadway coefficient of horizontal pressure is 1, according to the elastic mechanics, established the mathematical analysis model, analyzed the plastic zone change rule of the roadway wall with the buried depth change. The results show that the higher wall plastic zone is larger than the lower wall plastic zone with the increase of the inclination angle of the coal seam, which provides reference for the support of the roadway.