... on the extraction of geomechanical parameters of rock masses using 3D point clouds, such as the number of discontinuity sets and their orientations, the normal spacing and the persistence. In this contribution we use two novel open source programs: Discontinuity Set Extractor (DSE) aids to analyse 3D point...

... estimation by Palmström (1996) and the P 32 estimation by Dershowitz (1985). The first one considers the total number of discontinuities in a certain volume weighed by the joint persistence whilst the second method consider the joint area computed by a statistical analysis of the traces under the hypothesis...

... metals & mining orientation failure mode rock mass principal stress reservoir geomechanics strength non-persistent joint unconfined compressive strength failure mechanism laboratory test joint step angle rotation rock bridge Reservoir Characterization persistence lower slope...

... and the confining pressure, the persistence of a joint has a significant impact on the the strength of rocks. Limited progress has been reponed on theoretical and experimental approaches to strength of jointed rocks containing finite sized joints. McClintock & Walsh (1962), Jaeger & Cook (1979) and Hoek (1968...

... peut etre utiliser come detecteur des comportements dangereux des roches en analysant un ensemble d'indices observes sur terrain. L 'apparaission ainsi que la persistance des indices qui constituent Ie system d'alarme pour Foes Las (Alarm for Stability Hazard) dans huit cas ou des gradins perd leer...