... or thermal oscillation and the observable response (displacements) vary considerably; across the sliding region, with depth below surface, and in time. Large slopes and the instruments within them re- spond to local fluctuations in these factors and trig- ger phenomena, and as such average or assumed...

.... Two main approaches have been used to simulate these highly anisotropic materials: i) techniques which explicitly model the jointed nature of the material, e.g., Discontinuous Displacement Analysis (DDA), Shi (1998), Discrete Element Method (DEM), Cundall et al. (1978), and the Finite Element Method...

... Upstream Oil & Gas mechanism hammah discontinuity Strength Reduction total displacement fe-ssr method displacement contour rock mass blocky rock slope blocky rock mass fe-ssr analysis slope problem failure mechanism slope stability analysis element shear strength reduction...

... for the analysis and assessment of block stability. The mapping of outcrops and drill cores is the traditional method for the determination of relevant discontinuity data. finite block outcrop plane geometry Upstream Oil & Gas displacement rock face evaluation Artificial Intelligence...

...Assessment of laser-based displacement mapping in an underground openIng F. Lemy& S. Yang Engineering Geology, Department ofEarth Sciences, ETH Zurich, Switzerland T. Schulz Institute ofGeodesy and Photogrammetry, ETH Zurich, Switzerland ABSTRACT: Knowledge of the temporal and spatial evolutions...

... may be described as an active wedge and the support must be designed to stabilize this wedge. Upstream Oil & Gas Piezometer rock cut reservoir geomechanics strength cohesion air transportation displacement site investigation sequence investigation rock excavation Reservoir...

... rotation Reservoir Characterization displacement boundary condition freedom Archambault deformation dilatancy strength variation instability kink band upper platen 1 INTRODUCTION The stability of rock slopes, underground openings and other works in intensely foliated or jointed rock masses...

... method to allow for finite dis- placement and rotations of discrete deformable or rigid blocks, as well as complete detachment. The calculation applies a force-displacement law at the contacts and Newton s second law for the blocks. Local and global damping is necessary to keep the model under control...

.... This, however, may not always be appropriate, as failure may be initiated by the displacement of a smaller wedge within a larger and subsequent unraveling of the rock mass. This will be addressed in subsequent work. Another limi- tation is that the analysis is based on tetrahedral wedges formed by three...

... is that by making this assumption, we retain in feff a convenient means of comparing the sliding resistance of different sample configurations. constraint foundation plane envelope shear test Upstream Oil & Gas unconstrained block dilation shear strength Wellbore Design displacement monolith...

.... Midstream Oil & Gas lng pilot cavern gas monetization pilot cavern LNG liquified natural gas displacement rock cavern operation rock mass construction cavern instrument Pilot Plant drainage system temperature profile ROCK mass RESPONSE LNG storage cavern wall low temperature rock...

... that notable vertical displacement in the roof pillar did not occur 25 cm above the chambers. Figure 3. Cross section of model after its disassembly. Thus the physical modeling study made it possi- ble to: determine the development of rock subsi- dence above the actual mined stopes; establish an opportunity...

... by geomorphologic peculiarities (mixed face conditions, variable orientation or rock masses and structure) such as flysch materials. In addition, portal stability problems, and geometrical issues such as the effects of simultaneous twin tunnel excavation on radial displacements of each bore are also key...

... slope failure mechanisms requires an understanding of structural geology, groundwater, rock mass strength and insitu stress conditions. Stress relief associated with mining excavation leads to elastic rebound and ground relaxation displacements that typically dissipate with time, a process that is often...

... short fractures linked by an initially intact rock bridge. Figure 9 presents a cross section of the two options. AMP QMS ORE ORE Figure 8. 3DEC model based on Surpac Vision and photo- graphical data Figure 9. Fractures defining the instability. Secondly, it was assumed that the displacements along...

... and axial displacements in three orthogonal directions. Trials took place at intermediate depths, 600 meters underground, in areas with extraction ratios exceeding 80%, and lasted several months. The present paper focuses on a successful trial, showing regular stress changes within the sill pillar all along...

... in the sequence of Figure 3 and in Figure 4, developed at low velocity in the whole subaerial slope and in the near shore portion of the submarine slope. This movement produced large displacements without evolving into a destructive slide. Figure 3. Limits of the major instability phenomena occurred on December...

... A-A of Checkerboard Creek showing the limits of the current displacements, interpreted water table, major shears and faults and the depth of weathering. 2.2 Morphology and geology of Checkerboard Creek The bedrock of the slope is comprised of massive to weakly foliated granodiorite. These rocks overlie the easterly...

... Reservoir Characterization stope reservoir geomechanics transverse section time step elastic-viscoplastic model correlation safety factor machine learning Upstream Oil & Gas vertical section time-dependent displacement crosscut instrumentation actual reading scale factor...

... interface with rock mass. A new strategy is recommended to improve practice for design of underground construction based on automated design system TUNNEL and simple measurement of contour displacements during construction in the tunnel or in the tunnel prototype. 1 INTRODUCTION Most of the well known...