ABSTRACT
In a geological setting such as in domain 18, plane failure may contribute to slope instabilities on different scales ranging from bench scale single mode plane failures to deep-seated step-path failure causing overall slope instability. A slope of the Cadia Hill Open Pit was identified to contain more large scale geological structures than originally expected. A slope index on a scale from 0-5 is introduced which is a function of slope/structure parameters and related predicted failure mechanisms. The chapter shows that large scale slope failure processes may be significantly influenced by high horizontal in-situ stresses. Possible slope failure mitigation measures, their practicality and costeffectiveness are assessed and the results considered in design and operational aspects as outlined by S. Pothitos et al. Main focus of the investigation was to study the impact of different slope angles and both geometrical and geomechanical structure parameters on slope stability.
