... mass, and the effect of confinement (backfill) on the brittle failure process,. During the experiment displacements, temperature, and acoustic emission events will be monitored through a loading cycle that starts in prepeak, i.e., elastic range and ends in the post-peak range. The rock mass...

... by the expression: v m = v + ((1 - 2v)/2)(1 - E m /E) (2) where: v m = poisson's ratio of the rock mass, and v = poisson's ratio of the core specimen. sinβcosβ coefficient rock mass modulus joint system displacement joint plane Poisson rock mass average joint length open joint reciprocal...

... available. hydraulic fracturing bolt 0 heave height metals & mining displacement Upstream Oil & Gas characteristic shotcrete rockburst damage TSL ejection fracture rock ejection rockbolt bolt mesh 0 procedure conventional support support media blasthole fibrecrete zone...

... & Gas material property Fluid Dynamics Simulation flow in porous media displacement rock joint specimen shear process joint surface roughness shear behavior dilation Reservoir Characterization aperture mechanical model direct shear test shear mechanical model transmissibility asperity...

... of a block of fractured rock in an in situ thermal test known as the Large Block Test (LBT). The results of a 3D DDA analysis are reported and the computed and measured deformations compared. 2. BASIC PRINCIPLES OF 3D DDA 2.1. Displacement and Deformation of a RockBlock In DDA, time steps are used...

... and stiffness of immediate roof members jointing in immediate roof cleat density in coal. roof displacement immediate roof Upstream Oil & Gas Thickness Modeling & Simulation displacement metals & mining weighting interval unsupported roof excavation soft roof Longwall...

... geomechanics complex reservoir metals & mining hydraulic fracturing Reservoir Characterization US government displacement explanation particle echelon fracture principal stress fracture pattern tension site Upstream Oil & Gas upward shear wing crack mechanism assemblage macroscale...

... deformation pattern only depends on the orientation of the fracture (anisotropic displacement field) and the volume of the fracture (intensity of the recorded tilts), the two being coupled. real time system Upstream Oil & Gas dimension Artificial Intelligence orientation hydraulic...

... simulation volumetric strain strain-induced permeability model Reservoir Characterization Fluid Dynamics pore pressure flow in porous media displacement viscosity Upstream Oil & Gas injection pressure injection test equation permeability model porosity permeability anisotropy permeability...

... Characterization overburden calibration Fluid Dynamics depletion Upstream Oil & Gas displacement compaction strain molenaar compaction forward prediction stiffness prediction complementary tool subsidence in-situ stress stress change ARMA/NARMS 04-639 Applying Geo-Mechanics and 4D: 4D...

... ranging from the micro-scale (via SEM and thin-section images), through the meso scale (via visual observati Modeling & Simulation displacement wellbore orientation reservoir geomechanics strength Upstream Oil & Gas prediction Reservoir Characterization orientation Pariseau...

... optical triangulation distance measurement device depth ratio subsidence phenomenon Interferometry Fluid Dynamics laser optical triangulation distance measurement Modeling & Simulation displacement subsidence model sensor model material subsidence profile subsidence factor cavity...

... from the wellbore so that the wellbore has no or little influence on the stresses and displacements due to the reservoir compaction on this surface. The calculated displacements on the cylindrical surface are then used as boundary conditions for a focused near-wellbore stress and strain analysis using...

... and gradationally. These discontinuities have effectively created a blocky rockmass. (available in full paper) structural geology metals & mining Upstream Oil & Gas shallow stope cross-section extensive hard rock mining displacement application pillar stability effect Canmet Surface Crown...

... predictions. This led the authors to question the link between the rock mass deformation modulus and the confining stress. A series of case histories, both idealised and from published measured data are demonstrated to check the validity of the modified technique. displacement characteristic line...

... ABSTRACT ABSTRACT: In tunneling, the prompt detection of weak zones ahead of the tunnel face is a key factor. It has been shown in the literature that tunnel wall displacements are sensitive to the presence of weak rock ahead of the tunnel face. In this paper, we investigate the influence...

... geotechnical difficulties and adequate counter measures during excavation problems related to tunnelling in brittle faults and the development of advanced support technology are demonstrated by case studies. structural geology displacement geological modeling Upstream Oil & Gas prediction...

... specimen, 3)Acoustic Emission and Fracture Surface Analysis. The major part of this paper will be devoted for part 1 of this study, however major findings in part 2 and 3 will be described briefly. Reservoir Characterization wedge indentor displacement metals & mining Engineering wedge...

... displacement relaxation stress reduction abutment relaxation compressive stress reduction excavation Pacific Rocks 2000, Girard, Liebman, Breeds & Doe (005) © 2000 Balkema, Rotterdam, ISBN 90 5809 1554 The impact of abutment relaxation on stability of underground mine openings Mark S. Diederichs...

... of the case presented shows that induced stresses around the excavation are greatly influenced by the post-peak characteristics of the fault. Artificial Intelligence strength stability analysis Upstream Oil & Gas displacement metals & mining peak displacement Simon criterion constant...