... mechanics isrm13 Upstream Oil & Gas rock slope rock block Rockfall Incident RAINFALL-INDUCED AND STRUCTURALLY-CONTROLLED SLOPE FAILURE AND ROCKFALL INCIDENTS ALONG PART OF WERKA DESCENT ROAD AND REMEDIAL MEASURES, NORTH WEST OF SAUDI ARABIA * B. H. Sadagah Faculty of Earth Sciences, King...

... of rock blocks defined by the rock mass discontinuities, considering the installed water pres- sures and the dam loads. More recently, Goodman & Powell (2003) applied Shi and Goodman s Block Theory to identify moveable blocks in concrete dam foundations. All these tech- niques, based on simple block...

... & Gas acquisition center open pit rock block antenna installation fracture dangerous site Harmonising Rock Engineering and the Environment Qian & Zhou (eds) © 2012 Taylor & Francis Group, London, ISBN 978-0-415-80444-8 Monitoring of cracks opening in the walls of deep pits Victor Oparin...

... ABSTRACT Isolated rock block methods have been widely used to evaluate the stability of underground excavations in blocky rock masses. However, these methods are generally based on geometrical considerations, ignoring the underground conditions and considering simplified translational...

... complete failure process of key blocks in a rock tunnel. Based on the developed 3-D NMM, a rock block falling from the side and roof of a horseshoe-shaped tunnel is studied. 12 discrete blocks are created, from which the most critical key blocks are found. The falling process of the key blocks detaching...

... geological origin and stability, the four recognitions below are obtained. (1) Most of the accumulation is composed of big rock blocks and gravel-bearing soil, dominated by big rock blocks. So there is a rock block arching in the accumulation. But domain 2 has obvious different structure from other domains...

... loading is applied in the form of constraining seismic displacement time history. The fracturing of the rock slab and the transition from continuous rock to discrete rock blocks are modelled by the Numerical Manifold Method (NMM) coupled with a fracturing algorithm based on the Mohr-Coulomb criterion...

.... The study shows that the DDA, which accounts for the block kinematics, provides a very different factor of safety as compared with Sarma's method. More realistic reaction forces around each rock block can be obtained by the DDA. The DDA's result shows two possible directions for the relative movement...

... blocks on slope is important, and it is also important to estimate travel distance of the rock blocks and their velocities at any points on the topographical map (Jaboyedoff et al. 2005). Estimations of them affect protection measures against rockfall. Often numerical simulations are conducted...

... ABSTRACT It is known that the time from the generation of the displacement to the collapse of the rock block is very short. Therefore, to evaluate the stability of the rock blocks quantitatively, it is necessary to find a sign that appears before the generation of the displacement. The rock...

..., this technique considers all kinds of the trace length distributions; contained dissecting and transecting trace lengths. Joint were statistically modeled based on field-surveyed data and the stability of rock blocks were analyzed around a tunnel in Korea using the BLOCSTAB program developed by Song et al. (2001...

... In the upper part of the planned location of the portal of a highway tunnel, there was a steep rock cliff with several unstable rock blocks. It seemed that the risk of those rock blocks to fall was very high. The cut-out to stabilize the rock cliff was monitored with various measuring...

... fracture characterization numerical method avalanch mechanical property Upstream Oil & Gas dissipation avalanche gravity centre stiffness dynamic friction coefficient Reservoir Characterization strength runout coefficient rock block deposit planar rock slide rock avalanch...

... dieser Probleme zu bestimmen. Stability of a rigid block on an inclined plane In rock slopes, the simplest failure modes are sliding and toppling. Sliding occurs due to a translation movement of a rock block or a rock mass along a plane failure surface. Toppling involves rotation of rock blocks...

... fracture through the rock blocks; (b) sliding along joint planes; and (c) mixed split-sliding mode of type (a) and type (b) In mixed split-sliding mode, the failure process of a rock mass initiates by slip along the pre-existing joint surfaces and follows by fracturing through the individual rock blocks...

... and its rock blocks slide along the primary structural planes with the mechanical properties of the rock blocks unaffected basically and no secondary structural planes generated, (3) the scope and shape of the disturbed zone are well coin- cident with those of the damaged area of tension and shear. RESUME...

... not be modelled using simple models like c.g, slip circle method, The complex interaction between rock blocks must be taken into con- sideration. I The global factor of safety of jointed rock can be calculated using the "shear strength reduction" technique. This technique in a finite clement or a finite...

... oil recovery equation 2 fracture recovery rock block Discrete fracture network approach for thermally assisted gravity segregation: . . enhanced oil ~ecovery .. , Methode basee sur les reseaux discrets de fractures appliquee a rarnelioratlon du taux de recuperation du petrote par separation par...

...Vertical and inclined impacts of rock blocks on a rock shed model ". ~ Impacts verticaux et inclines de blocs sur un modele de toit de galerie de protection Vertikale und schraqe Einschlage auf ein Model einer Schutzgalerie '" S.MONTANI STOFFEL, V.LABIOUSE & F.DESCOEUDRES, Laboratoire de Mecanique...

...; the discontinuum approach and the continuum approach. The discontinuum approach takes the behaviour of discrete rock block into direct consideration during the analysis. On the other hand the continuum approach takes into account the pseudo- continuous body, the behaviour of which is equivalent to jointed rocks...