强度折减法在边坡稳定性评价中得到了广泛应用,它是以线性的Mohr-Coulomb准则为依据进行的。采用Hoek-Brown准则与强度折减原理相结合的方法,以某铁矿矿区的边坡为例进行稳定性分析研究,并对风化程度不同的岩层采用不同的强度准则,进行了对比分析。结果表明:Hoek-Brown强度准则适用于风化程度较小的岩层;当考虑地表荷载时,其作用范围的大小并不会影响边坡的稳定性,并且对于边界条件的影响也不明显。 Strength reduction method has been widely used in slope stability evaluation, which is based on the linear Mohr-Coulomb criterion. The Hoek-Brown criterion and the principle of strength reduction are used to analyze the stability of a slope in an iron ore mine. The strength of rock layers with different weathered degree is compared and analyzed. The results show that the Hoek-Brown strength criterion is suitable for rock layers with less weathering. When the surface load is considered, the range of its size does not affect the stability of the slope and its influence on the boundary conditions is not obvious either.