深部松软破碎顶板回采巷道围岩控制及支护技术研究

Study on Surrounding Rock Control and Support Technology of Deep Soft and Broken Roof Mining Roadway

针对121101工作面回采巷道松软破碎围岩支护困难以及易发生大变形的问题,基于工作面顶板岩层的赋存条件及回采巷道的原有支护方案,提出了内外层锚杆组合的优化支护技术。数值模拟及现场监测结果表明:采用该优化支护方案后,巷道顶板、底板、两帮最大变形量分别约为30 mm、14 mm、34 mm,实现了对松软破碎顶板回采巷道围岩的有效控制。

In view of the difficulty and the large deformation of the soft broken surrounding rock in the mining roadway of the 121101 working face,based on the occurrence conditions of roof rock and the original supporting scheme of the mining roadway,the optimal support technology of the combination of internal and external anchor rods is proposed.The numerical simulation and field monitoring results show that the maximum deformation of roof,floor and two sides of roadway is about 30 mm,14 mm and 34 mm respectively after the optimized support scheme is adopted,which realizes the effective control of surrounding rock of the roadway.