盘区辅助回风巷护巷煤柱宽度尺寸研究

Width of coal pillar in panel auxiliary air return roadway

为了保证神树畔煤矿31盘区辅助回风巷的安全施工,在总结31104工作面矿压监测数据的基础上,采用煤柱载荷估算和极限平衡区理论计算出护巷煤柱尺寸合理范围;综合实测分析和理论计算取值后,以煤层地质条件和巷道布置为背景,通过数值模拟10m、15m、20m、25m护巷煤柱条件下护巷煤柱内部得应力和变形规律,研究结果表明:31盘区辅助回风巷受一侧采动影响后,按20m留设护巷煤柱可以满足生产需要。

In order to ensure the safe construction of the panel 31 auxiliary air return roadway in Shenshupan Coal Mine,on the basis of summarizing the ground pressure monitoring data of 31104 working face,the reasonable size range of coal pillar for roadway protection is calculated using coal pillar load estimation and limit equilibrium zone theory;after comprehensive actual measurement analysis and theoretical calculation,taking the geological conditions of coal seams and roadway layout as the background,the internal stress and deformation laws of roadway protection coal pillars under the conditions of 10 m,15 m,20 m and 25 m roadway protection coal pillars are studied through numerical simulation,the results show that:under the influence of mining on one side,20 m roadway protection coal pillars can meet the production needs.