泥岩顶底板回采巷道变形特征及支护技术

Deformation Characteristics and Support Technology of Mining Roadway with Mudstone Roof and Floor

为解决木瓜煤矿泥岩顶底板回采巷道变形大的难题,在分析失稳原因的基础上,确定采用桁架锚索支护系统。研究表明,锚索桁架与顶板为线接触,可以显著改变巷道顶板围岩的受力状态,提高围岩的自承能力。结合工程类比和数值分析的方法确定了具体的支护参数,在10-1021巷应用取得了较好的控制效果。

In order to solve the problem of large deformation of mudstone roof and floor mining roadway in Mugua Coal Mine,based on the analysis of instability reasons,truss anchor cable support system is adopted.The research shows that the line contact between the cable truss and the roof can significantly change the stress state of the surrounding rock of the roadway roof and improve the self-supporting capacity of the surrounding rock.Combined with engineering analogy and numerical analysis,the specific support parameters are determined,and good control effect is achieved in the 10-1021 roadway.