【摘要】 以麻家梁煤矿综放工作面区段煤柱为研究对象，通过理论分析、数值模拟等开展不同尺寸区段煤柱留设下巷道围岩应力、塑性区分布研究，确定合理的区段煤柱。基于极限平衡理论计算得到：麻家梁煤矿14202工作面区段煤柱合理尺寸为20～25 m。数值模拟结果表明：随区段煤柱尺寸的增大，煤柱内应力集中程度和范围逐渐减小；区段煤柱尺寸大于24 m，其内部出现弹性核，且弹性核范围随区段煤柱尺寸增大而增大，即可以24 m为临界尺寸优化麻家梁煤矿综放开采区段煤柱尺寸。以麻家梁煤矿现有区段巷道支护方案模拟分析24 m区段煤柱下巷道围岩应力、塑性区分布情况，表明24 m区段煤柱下支护前后应力、塑性区均呈现减小趋势，可保证巷道围岩的稳定性，且相比原40 m区段煤柱，可减少16 m煤柱尺寸煤炭资源浪费。更多还原

【Abstract】 The coal pillar in the fully mechanized caving face of Majialiang coal mine is taken as the research object, and the distribution of stress and plastic zone in the surrounding rock of roadway with different size coal pillar is studied through theoretical analysis and numerical simulation, so as to determine the reasonable coal pillar in the coal pillar section.Based on the limit equilibrium theory, the reasonable size range of coal pillar in 14202 working face section of Majialiang coal mine is 20 m-25 m.The numerical simulation results show that with the increase of coal pillar size, the stress concentration degree and range of coal pillar decrease gradually.When the coal pillar size is larger than 24 m, there is elastic core inside the coal pillar, and the elastic core range increases with the increase of the coal pillar size, that is, 24 m can be used as the critical size to optimize the coal pillar size in Majialiang coal mine. The distribution of stress and plastic zone in roadway surrounding rock under coal pillar in the 24 m section is simulated with the existing roadway support scheme in Majialiang coal mine. The results show that the stress and plastic zone before and after the support under coal pillar in the 24 m section show a decreasing trend, which can ensure the stability of roadway surrounding rock and reduce the waste of coal resources with the size of 16 m coal pillar compared with the original 40 m section coal pillar.更多还原