... ABSTRACT Various devices such as Barton comb, optical and laser scanner are used to record surface geometries of rock joints for roughness measurement. Measurement resolution of the used device can vary significantly depending on settings and the nature of device. Ignoring the effect...

... joint specimen shear behavior shear stress reservoir characterization joint surface rock joint shear test displacement rock bolt cn condition peak friction coefficient deformation specimen normal stiffness initial normal stress upstream oil & gas normal stress boundary...

... metals & mining upstream oil & gas correlation rock joint cleat aperture coal cleat characteristic shear strength coal sample aperture normal stress residual cohesion university cohesion kpa friction angle residual friction angle ARMA 21 1379 A new approach for measuring...

... ABSTRACT: One key factor affecting the long-term stability of underground rock structure is the time-dependent behavior of the rock mass. It is the overall response of the viscous behavior of intact rock and rock joints or discontinuities. The unconfined relaxation tests on sandstone...

... Monte Carlo simulation Rock mechanics stability US government strength rock joint coefficient shear strength granite boulder field measurement probability friction angle slope pedestal 1. INTRODUCTION 1.1. Motivation for the Study As cities continue to expand, development within difficult...

... modeling for assessing the shear strength of rock joints may be realistic. Reservoir Characterization Wellbore Design US government roughness gravity dam wellbore integrity Upstream Oil & Gas Rock mechanics rock joint replica envelope apparent cohesion mechanical property fracture...

... ABSTRACT: Ultrasonic wave measurements have been used as a remote and non-destructive method to monitor the changes in state of stress and slip initiation in rock joints. Although ultrasonic precursors in the form of maximum transmitted amplitude have been reported for gypsum and Indiana...

..., asperity angles and filling material) play an important role in the failure mode. Wellbore Design displacement rock joint wellbore integrity Shear Characteristic normal stress specimen mechanical property Reservoir Characterization Upstream Oil & Gas Rock mechanics international...

... ABSTRACT: Shear behavior of rough rock joints is considerably complex, as the failure process is governed by non-uniform degradation of asperities. To investigate the nonlinear shear behavior of rough joints, a series of experimental and numerical tests were conducted on saw-toothed mortar...

... Symposium Upstream Oil & Gas feasibility mechanism Reservoir Characterization Nelson Simulation rock joint rock mass Plaster failure mechanism jointed rock mass compression Health & Medicine artificial jointed rock mass artificial joint material hirschfeld rock material mechanics...

... ABSTRACT: A comprehensive understanding of the shear strength and the mechanical behavior of rock joints is to some extent still missing today. Several attempts have been made to develop empirical and analytical shear strength criteria that explain this mechanism. One of the most important...

... shearing rates, in the VW region, the wear material significantly increases the mean separation between the two surfaces, resulting in a weaker joint. Reservoir Characterization wave velocity Artificial Intelligence shear strength rock joint stick-slip cycle Masoumi shear displacement rate...

... Reservoir Characterization Upstream Oil & Gas surface geometry direct shear test surface description Wellbore Design ultimate dilation joint surface rock joint plane asperity dilation response 1. INTRODUCTION Rock dilatancy is of high importance in influencing the hydro-mechanical behavior...

... that the estimated penetration radius in 2-dimensional radial flow analysis was well comparable to our experimental observation of cement grout injection in a rock joint replica. Our simulations of the coupled flow-deformation analysis showed that grout injection-induced joint opening may enhance a penetration...

... ABSTRACT: Current standard multi-stage direct shear test methods for rock joints do not consider the individually unique asperity profile and nature of the testing specimens. These techniques require either the shearing of a single sample under multiple normal loads, or the shearing...

... geomechanics Reservoir Characterization fracturing fluid proppant displacement Fluid Dynamics normal load natural fracture mechanical aperture fracturing materials complex reservoir aperture mechanism hydraulic fracturing Upstream Oil & Gas calculation tiny window lower surface rock joint...

... geomechanics geomechanics dilation fracture rock joint strength envelope friction coefficient Byerlee equation gas shale shear strength 1. INTRODUCTION Due to remarkable educational compartmentalization, there is widespread use of linear shear strength assumptions in the petroleum geomechanics...

... degradation direct shear test shear resistance artificial intelligence asperity mechanism rock mech discontinuity rock joint direct shear specimen simulation friction angle asperity damage reservoir characterization evolution geometry reservoir geomechanics specimen shear displacement 1...

... Abstract The typical shear behaviour of rock joints has been studied under a constant normal load (CNL) or zero normal stiffness condition, but recent studies have shown that this boundary condition may not replicate more practical situations, and that constant normal stiffness (CNS...

... of the cavability of the orebody. An asperity degradation model for rock joints has been developed that considers the progressive abrasion of a true roughness area over joint sliding. The magnitude of dilatancy is predicted to be decreased exponentially with the increase in shear displacements. The degradation...