倾斜煤层直角梯形巷道围岩应力非对称特征试验研究

Experimental Research of Asymmetric Characteristics of Surrounding Rock Stress in Right Angle Trapezoidal Tunnel of Inclined Coal Seam

以石炭井二矿工程条件为背景,采用相似模拟试验方法,对倾斜煤层直角梯形巷道围岩应力非对称特征进行研究,其目的是为该地区围岩稳定性控制提供科学依据。结果表明:巷道开挖后应力重分布呈现明显的非对称特性,应力向巷道低帮一侧集中,导致巷道低帮侧帮角及帮部产生明显的非对称变形破坏,低帮一侧为围岩稳定性控制的关键部位。

Based on the engineering geological conditions of the Shitanjing 2# mine, study on asymmetry characteristics of surrounding rock stress in right-angle trapezoidal roadway in inclined coal seam using indoor similar simulation test method, the purpose is to provide scientific basis for the stability control of the surrounding rock in this area. The results show that the stress re-distribution after roadway excavation presents obvious asymmetry, the stress is mainly concentrated on the low-side top corner of the roadway, causing obvious asymmetrical damage on both sides of the roadway,and the key to the stability control of surrounding rock is the low side.