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针对7111大倾角沿空掘巷窄煤柱合理尺寸难以确定的问题,基于弹塑性极限平衡理论计算了煤柱宽度,运用FLAC~(3D)数值模拟分析了留设5 m窄煤柱时围岩应力分布规律和变形特征,提出了巷道围岩整体性控制措施及高强耦合体系的联合支护方式。
In view of the difficulty of determining the reasonable size of narrow coal pillar along gob-side entry in 7111 steep inclined roadway, the width of coal pillar is calculated based on the elastic-plastic limit equilibrium theory. The surrounding rock of 5m narrow coal pillar is analyzed by FLAC 3D numerical simulation Stress distribution and deformation characteristics of the surrounding rock roadway proposed a holistic control measures and high strength coupling system of joint support.