软岩交叉巷道开挖围岩稳定性数值模拟分析

Numerical simulation analysis of wall rock stability at intersection of tunneling in soft rock

本研究以北洺河铁矿为工程背景,针对采准切割工作中出现的软岩交叉巷道,运用FLAC3D对联巷交叉口进行三维数值模拟分析,研究交叉口围岩的力学、位移和变形破坏演化规律,并将控制点的位移监测值与计算值进行对比分析。研究结果表明:数值模拟方法必须辅以现场监控量测,才能客观正确地反映出地下工程在施工过程中围岩应力、位移及塑性区分布等特征,并为施工设计提供有效的参考依据。

There are many intersections in preparatory workings of soft rock tunnel at Beiminghe Iron Mine, 3D numerical simulation analysis of the intersection between link roadways based on software FLAC3D , in which the mechanics of wall rock ＆ displacement ＆ deformational and destructive law are studied, and compared the results between simulation monitoring ＆ practicality monitoring of control points. The results show that the numerical simulation methods must be supplemented by monitoring measurement on-the-spot, so as to reflect the distribution and other features of rock stress ＆displacement＆ plastic zones objectively and correctly in the process of underground engineering, and providing effective ref- erence for construction design.