为有效治理含水陷落柱的导水致灾现象,以平朔井工一矿4108工作面为背景,根据井下实际地质生产条件计算防水煤柱极限平衡宽度,从理论层面初步确定防水煤柱留设宽度,同时利用UDEC软件对不同宽度的煤柱塑性破坏进行数值模拟分析。模拟结果表明:当煤柱宽度达到40m时,煤柱内的屈服区和周边裂隙带基本保持稳定,根据煤柱稳定性对弹性区宽度应大于14m的要求,防水煤柱宽度应留设40m;在煤柱宽度与弹性区宽度关系上,煤柱内弹性区的宽度随着煤柱宽度的增加而增加,当煤柱宽度大于40m时,煤柱内屈服区与塑性区的宽度已基本稳定。4108工作面采用设计的绕过陷落柱方案,优化了绕过陷落柱工序,有效降低了煤炭资源的损失。

To effectively manage the water diversion-induced disaster phenomenon of water-bearing collapse columns, this study focuses on the 4108 working face of Pingshuo Jinggong No.1 Coal Mine.It calculates the limit equilibrium width of waterproof coal columns based on the actual geological production conditions under ground.The study aims to determine the width of water proof coal columns theoretically and uses UDEC soft ware to simulate and analyze the plastic failure of coal columns with varying widths.The simulation results in dicate that when the width of the coal column reaches 40 m, the yield zone and surrounding crack zones inside the coal column remain essentially stable.According to the stability requirements of a coal column, the elastic zone's width should exceed 14 m, while the waterproof coal column's width should be maintained at 40 m.The width of the elastic zone within the coal column increases as the coal column width increases.When the width of the coal column exceeds 40 m, the width of the yield zone and the plastic zone within the coal col umn remains relatively stable.The 4108 working face adopts a designed bypass collapse column scheme, which optimizes the process of bypassing collapsed columns and effectively reduces the loss of coal re sources.