ABSTRACT
Chapter 7 discusses the stability of plane failure where the rock slope contains a joint(s) that strikes parallel to the slope face and dips out of the face. The stability of these slopes is analysed using limit equilibrium methods (LEA) where the ratio of the resisting forces, defined by the cohesion and friction angle of the sliding surface, to the driving forces is the factor of safety. It is demonstrated how the LEA equations can be modified to include bolting and ground water forces. An example of probabilistic stability analysis to calculate the probability of failure is included. Also discussed is the stability of ‘dip slopes’ where the slip surface striking parallel to the face does not daylight in the face. Example problems are included.
