含软弱夹层对巷道围岩承载结构的影响分析

为研究软弱夹层对巷道围岩承载结构和稳定性的影响,采用相似材料模拟和理论分析相结合的方法,通过三种不同方案对比分析了不同支承结构下含软弱夹层巷道围岩受力与变形情况,揭示了含软弱夹层巷道围岩稳定控制机理,并通过现场实测进行验证。结果表明:①巷道顶板和帮部破坏程度明显大于肩部;②采用方案三联合支护能够有效提高巷道围岩应力和承载力;③联合支护方案能够使软弱夹层与上、下硬岩层之间协同耦合承载,减少巷道围岩变形。

Analyze the influence of soft interlayer on the bearing structure of roadway surrounding rock

] In order to study the weak interlayer effect on the bearing structure and stability of the roadway surrounding rock, based on the similar material simulation and theory analysis method, through three different schemes comparison analysis under different supporting structure stress and deformation of roadway surrounding rock containing of weak intercalations, reveals the mechanism of roadway surrounding rock stability control, including weak intercalated and validated by the measured on site.The results show that: 1) the damage degree of roof and side of roadway is obviously greater than that of shoulder;2) the combined support of scheme 3 can effectively improve the surrounding rock stress and bearing capacity of the roadway;3) the combined support scheme can make the weak interlayer and the upper and lower hard rock stratum synergistic coupling load bearing, reduce the roadway surrounding rock deformation.