ABSTRACT
35 Landslide Hazards POTENTIAL SLOPE FAILURES Most failures of rock slopes are related to planar weaknesses with unfavourable orientations. Wedge failures most likely where line of intersection of two fracture planes dips < <|> and daylights in slope. Best interpreted graphically by stereoprojectlon. Hazard zones. A failure potential can be recognized, but incomplete data on buried rock structure means that stability analysis can only be estimated, and risk assessment is subjective dependent on strengths and structures assumed. Time of failure cannot normally be predicted except that it will probably be during or just after a rainstorm. Size and speed of future event is rarely predictable. Small unsafe slopes may be economically stabilized. Large unstable slopes are best avoided if possible.
