基于Hoek-Brown准则的边坡开挖岩体力学参数研究

将边坡开挖弱化因子引入广义Hoek-Brown强度准则，并对其进行定量表述，以研究爆破开挖对边坡岩体力学参数的影响程度．工程实例表明：开挖对不同边坡岩体的力学参数的影响程度不同，对坚硬岩体的影响比对软弱岩体的影响大；开挖弱化因子与变形模量、黏结力和内摩擦角呈线性相关，与抗拉强度呈指数相关．

Hoek-Brown criterion-based study on mechanical parameters of excavated slope rock masses

For discussion of the influences of explosive excavation on the mechanical parameters of rock masses, the slope excavation softening factor was introduced into the general Hoek-Brown strength criterion, and a formula for its calculation was also given. Practices show that the degree of the influence of slope excavation on the mechanic parameters varies with the kind of rock masses, the influence on the sound rock mass being greater than that on the soft one, and that the excavation softening factor is of linear relationship with the deformation modulus, cohesion and internal friction angle, and is of exponential relationship with tensile strength.