大断面软岩巷道稳定性研究与控制

Study on Stability and Control of Large Section Soft Rock Roadway

针对阳煤五矿五采区南回风巷围岩强度较低、巷道稳定性较差等问题,通过FLAC3D数值模拟,分析不同岩性巷道开挖后的应力规律与塑性区分布,研究大断面软岩巷道的变形机理,并对巷道原有支护方案进行优化。由试验巷道现场监测结果可知,优化方案可有效控制试验巷道变形,巷道的整体稳定得到有效保障。

Aiming at the problems of low strength of surrounding rock and poor stability of roadway in south return wind roadway of No.5 mining area of Yangmei No.5 Coal Mine,the stress law and distribution of plastic zone after excavation of different lithologic roadway are analyzed by FLAC3D numerical simulation,the deformation mechanism of large section soft rock roadway is studied,and the original supporting scheme of roadway is optimized.It can be seen from the field monitoring results of the test roadway that the optimization scheme can effectively control the deformation of the test roadway and the overall stability of the roadway is effectively guaranteed.