深井软岩巷道多重扰动影响下合理布置位置和支护方案优化

Reasonable Layout and Support Scheme Optimization of Deep Soft Rock Roadway under the Influence of Multiple Disturbances

针对受多重扰动影响的深井软岩巷道支护难题,进行了巷道合理布置位置和支护方案优化研究。以丁集煤矿西三采区三条集中大巷为工程背景,采用工程地质调查、室内试验、数值模拟和现场监测等方法,系统研究了受采空区应力重分布和巷道掘进相互扰动等多重影响下西三采区大巷的布置层位、巷道间距及支护方案。数值模拟结果表明,西三采区集中大巷合理布置层位应选在距上覆13-1煤15m层位,掘进巷道水平间距应大于30m。在此基础上,又进行了巷道支护方案优化工作,得到了优化支护参数,并将研究结果应用于工程实际,通过现场监测表明,巷道布置位置和支护方案优化结果可实现巷道围岩稳定、确保采区安全生产。

Aiming at the support problem of deep well soft rock roadway affected by multiple disturbances,the reasonable layout of roadway and the optimization of support scheme were studied.Taking the three main roadways in the West Third mining area of Dingji Coal Mine as the background,the layout,roadway spacing and support scheme of the main roadways in the west NO.3 mining area are systematically studied under the multiple influences of stress redistribution in the goaf and disturbance of roadway excavation by means of engineering geological survey,indoor test,numerical simulation and field monitoring.The numerical simulation results show that the reasonable layout of the main roadway in the west NO.3 mining areas should be 15m away from the overlying 13-1 coal,and the horizontal distance of the driving roadway should be more than 30 m.On this basis,the optimization of roadway support scheme was carried out,and the optimized support parameters were obtained.The research results were applied to the engineering practice,and the field monitoring showed that the roadway layout position and the optimization results of support scheme could help to achieve stability of roadway surrounding rock and ensure the safety of mining area.