大采高工作面沿空侧巷道超前区域围岩控制研究  

Research on the Control of Surrounding Rock in the Leading Area of Roadways along the Gob Side of Large Mining Height Faces

作　　者：翟春佳 邓亮 常毛毛 ZHAI Chunjia;DENG Liang;CHANG Maomao(Shaanxi Xiaobaodang Mining Co.,Ltd.,Yulin 719000,China)

机构地区：[1]陕西小保当矿业有限公司,陕西榆林719000

出　　处：《煤》2024年第1期18-21,共4页Coal

基　　金：中煤科工开采研究院科创创新基金重点项目(KCYJY-2021-ZD-02);天地科技开采设计事业部创新基金重点项(KJ-2021-KCZD-02)。

摘　　要：文章以小保当煤矿112204工作面开采为工程背景,采用理论分析、数值模拟、现场施工和电磁辐射监测的方法对其沿空侧的回风平巷超前段围岩稳定性进行研究分析,结果表明:112204工作面超前支承应力与邻近112203采空区侧向支承应力叠加影响,将导致支承应力叠加区内煤岩体极易发生失稳破坏;适当地增加支承应力叠加区内煤岩体的剪切破断角值和侧向围压值能够有效提升支承应力叠加区内煤岩体失稳破坏时所需的支承应力临界值;实施优化支护和注浆措施后,实体煤帮内电磁辐射均值降幅达64.6%,此时煤岩体失稳破坏程度大幅度改善,围岩处于较好的控制状态,能够很好地服务于112204工作面回采作业。This article takes the mining of the 112204 working face in Xiaobaodang Coal Mine as the engineering background,and uses theoretical analysis,numerical simulation,on-site construction,and electromagnetic radiation monitoring methods to study and analyze the stability of the surrounding rock in the advance section of the return air roadway along the goaf side.The results show that the superposition effect of the advance support stress of the 112204 working face and the lateral support stress of the adjacent 112203 goaf will easily lead to instability and failure of the coal and rock mass in the support stress superposition area;properly increasing the shear fracture angle and lateral confining pressure of the coal and rock mass in the support stress superposition area can effectively enhance the critical value of the support stress required for the instability and failure of the coal and rock mass in the support stress superposition area;after implementing optimized support and grouting measures,the average decrease in electromagnetic radiation inside the solid coal slope reached 64.6%.At this time,the degree of instability and damage of the coal and rock mass was greatly improved,and the surrounding rock was in a good control state,which can effectively serve the mining operation period of the 112204 working face.

关 键 词：支承应力 沿空巷道 超前区域 耦合注浆 电磁辐射 

分 类 号：TD353[矿业工程—矿井建设]