中文摘要：

以付村煤矿3上411工作面沿空巷道掘进期间受3上408工作面回采动压影响为研究背景,通过理论分析及计算得出窄煤柱的合理尺寸为4.74～5.53 m.利用FLAC3D软件对不同宽度煤柱条件下的8种方案进行数值模拟并对模拟结果进行对比分析,最终确定窄煤柱的最合理宽度为5m.

英文摘要：

Taking the gob-side entry driving of No.3up 411 mining face which influenced by the mining activity dynamic pressure of No.3.p 408 as studying background. Through theoretical analysis and calculation conclude that the reasonable size of narrow coal pillar is 4.74-5.53 m. Three-dimensio-nal fast lagrange analysis of continua （FLAC3D） is used to the numerical simulation of eight program under the condition of different the size of chain pillar and eompared the simulation results.