Abstract: To overcome the shortcomings of finite element method and particle flow method in simulating the stability of soil-rock mixture (SRM) slope, a new method for generating random finite numerical models of SRM is presented, and models of SRM slope generated by this method are used to analyze the influence of rock block proportion on SRM slope’s stability by using strength reduction method. The results show that: with the increase of rock block proportion, the feature of heterogeneously distributed internal stress field and multiple sliding surface gradually strengthens; the stability factor of SRM slope gradually improves with the increase of rock block proportion. The stability factor of SRM slope increases slowly when the rock block proportion is less than 40%, but increases rapidly when the rock block proportion is between 40% and 55%, and then basically remains unchanged.

Key words: SRM, slope, rock block proportion, strength reduction method, stability analysis