陡缓节理切割形成的平面滑移型危岩稳定性分析

Stability Analysis on Dangerous rock of Plane Sliding Mode Formed by Cutting of Steep or Gentle Joints

通过建立以陡、缓2组节理切割形成的危岩体平面滑移失稳模式的工程地质模型,分析典型失稳模式的特征,并结合静力平衡分析和数值模拟的方法研究节理倾角、边坡坡角、裂隙水深度、结构面强度等因素对危岩体稳定性的影响,为危岩体崩塌成灾预判和危险性预估评价提供依据。研究结果表明:影响围岩稳定性的敏感因素由大到小依次为裂隙水、内摩擦角、坡角、陡倾角、缓倾角和黏聚力。

The engineering geological model of plane-sliding rock cut by steep and gentle joints was established to analyze the characteristics of typical rock unstable modes. Combined with the static equilibrium analysis and numerical simulation method, influence of joint angles, slope angle, fissure water depth, structure surface strength and other factors on the stability of rock was studied. The results show that the sensitive factors from large to small in turn were fissure water depth, internal friction angle, slope angle, steep joint angle, gently joint angle and cohesion.The research results provide effective support for possibility prediction and hazard pre-assessment on collapse of dangerous rock.