松软窄煤柱围岩破坏及控制技术研究

Study on the Damage Control Technology of Soft and Narrow Coal Columns

以青洼煤业松软窄煤柱巷道围岩控制为工程背景,综合分析21041巷综放沿空巷道围岩变形状况,确定采用5 m窄煤柱护巷,针对性提出"锚网索+注浆+桁架锚索"支护方案,并运用数值模拟、矿压观测等研究方式验证窄煤柱围岩控制效果。试验表明:5 m煤柱应力分布较均匀,承载力较强,围岩变形基本稳定,为相似地质条件巷道围岩控制提供借鉴。

Based on the surrounding rock control of soft narrow coal pillar roadway in Qingwa Coal Industry,the deformation of surrounding rock in the 21041 roadway is analyzed synthetically,and 5 m of narrow coal pillar retaining roadway is adopted,and the supporting scheme of "bolt mesh cable + grouting + truss anchor cable" is proposed,and the control effect of narrow coal pillar surrounding rock is verified by numerical simulation and ground pressure observation.The test results show that the stress distribution of 5 m coal pillar is uniform,the bearing capacity is strong,and the deformation of surrounding rock is basically stable,which provides reference for the control of surrounding rock of roadway under similar geological conditions.