..., a possible area of instability is hig- hlighted. The topographical information was ob- tained through airborne photography and digitized under the Surpac Vision environment. Figure 2 presents a close up of the instability area defined in Surpac Vision. One may observe the possible instability region...

... strength slope failure evaluation rock slope failure Reservoir Characterization quarry face instability shear strength joint attitude rock mass structure operation rock block friction angle Upstream Oil & Gas specimen MPa shear test 1 INTRODUCTION Open pit quarry...

... and dip direction) on a block by block basis. An algorithm has been developed that automatically detects possible kinematic slope instabilities. The spatial distribution of potential instabilities can thus be assessed for a given ultimate pit. The resulting mine design (inter-ramp slope, overall slope...

... mine sites were visited by NIOSH researchers. Bench mining of the floor had been carried out at 18 of the 31 mine sites visited. Evidence of increased instability of the pillars at or near the perimeter of the benched areas was ob- served at six of these mines. The observed instability was in the form...

...1 INTRODUCTION The instability of engineered and natural slopes is often of high importance due to potential for loss of life and property. The GroundProbe Slope Stability Radar (SSR) was developed to aid in the manage- ment of risks associated with unstable slopes. This paper describes the use...

... and a feedback loop for ongoing optimization of instrumentation system de- sign and interpretation protocols. This paper de- scribes an ongoing project to develop a decision- support system for large slope instability monitoring and management. A case history (Downie Slide) is used to highlight some...

...1 INTRODUCTION Digital elevation models (DEMs) are used in many hazard assessment methods, including landslides and rock instabilities. Slope angles are used for stability estimation, e.g. infinite slope stability models (Die- trich et al. 2001). Kinematic tests are used to esti- mate...

... ABSTRACT ABSTRACT: This paper investigates the conditions favourable to the development of a kink zone instability in jointed rock masses in relation with: 1) the rate of deformation and 2) the boundary conditions. Numerical simulations using the distinct element code UDEC have shown...

... (SLM). Parametric studies were performed to determine the factors causing instability and controlling the failure processes. The factors can be classified into internal and external factors. Internal factors can be subdivided into main and sub factors. The basic SFi value is evaluated from...