华苑煤业10号煤层回采巷道围岩支护稳定性研究

Study on Surrounding Rock Support Stability of Mining Roadway in No.10 Coal Seam of Huayuan Coal Industry Co.,Ltd.

为了解决因非对称力造成的巷道围岩大变形失稳,对原设计方案进行了改进,通过数值模拟的方法验证改进方案的可行性。结果表明,针对倾斜煤层,采用直墙半圆拱形巷道断面能够消除巷道顶板围岩中的应力集中现象,巷道顶板围岩破坏和下沉变形较原方案分别降低了42.85%和67.16%。

In order to solve the large deformation and instability of surrounding rock caused by asymmetric force,this paper improved the original design scheme,and verified the feasibility of the improved scheme by numerical simulation.The results showed that for the inclined coal seam,the stress concentration in the surrounding rock of the roadway roof could be eliminated by adopting the straight wall semi-circular arch tunnel section,and the destruction and subsidence deformation were reduced by 42.85%and 67.16%respectively compared with the original scheme.