【摘要】 结合某隧道塌方的实例,通过现场实验和理论分析,得到了隧道塌方的主控因素是围岩的结构强度,指出改善围岩的物理力学特性,提高围岩的自承能力及其整体性是控制隧道塌方的主要措施,运用二维离散元程序软件对帮部岩性弱结构、两种位于顶板不同深处的顶板岩性弱结构模型进行数值模拟,再现了隧道顶板岩层离层、弯曲、沉降、开裂直至塌方的全过程。更多还原

【Abstract】 The author combining with the instance of someone tunnel collapse accidence,and through the experimental and theoretical analysis the key factors of the tunnel collapse are the structural strength of the rock.The main tunnel collapse control measure is that improving the physical and mechanical characteristics and improving the integrity of self-supporting ability of the surrounding rocks is put forward.Weak lithological structure mode of side walls and two weak lithological structure modes of roof in the different position are numerical simulated using two-dimension UDEC3.1 software,which reappears the overall process from absciss layer,bend,sedimentation,craze to roof fall.更多还原