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Keywords: shear behavior
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Proceedings Papers

Paper presented at the 57th U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2023
Paper Number: ARMA-2023-0520
... of resolution may result in misestimation of effective roughness because resolution determines how precise details are captured by the measurement. To improve our understanding on the proper resolution for roughness measurement, effect of micro-scale asperities on the shear behavior of rock joints...
Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-2318
... 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...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-1980
... fracture growth in shale formations. complex reservoir shale shear stress direction Upstream Oil & Gas hydraulic fracturing presentation shear failure shear stress shear device Shear Anisotropy shear behavior shale formation shear test fracture surface shear angle shear fracture...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-220
... 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...
Proceedings Papers

Paper presented at the 52nd U.S. Rock Mechanics/Geomechanics Symposium, June 17–20, 2018
Paper Number: ARMA-2018-832
... theory and damage mechanics, is proposed to simulate experimentally observed shear behavior of shale. The proposed model is formulated to predict the quasi-brittle behavior of shale in the pre-peak stage as well as the strain softening post peak behavior which is believed to be caused by the growth...
Proceedings Papers

Paper presented at the 46th U.S. Rock Mechanics/Geomechanics Symposium, June 24–27, 2012
Paper Number: ARMA-2012-457
... ABSTRACT: This paper investigates the shear behavior of rock joints in a direct shear test using PFC2D. PFC2D is a distinct element software in which the rock is represented by a dense packing of non-uniform sized circular particles bonded at their contacts and damage process under loading...
Proceedings Papers

Paper presented at the 45th U.S. Rock Mechanics / Geomechanics Symposium, June 26–29, 2011
Paper Number: ARMA-11-226
.... Instrumentation located near the wedge recorded the movement of the rock mass. Upstream Oil & Gas normal load bonding percentage reservoir geomechanics strength shear behavior residual shear strength concrete-rock interface shear strength structural geology displacement direct shear test...
Proceedings Papers

Paper presented at the DC Rocks 2001, The 38th U.S. Symposium on Rock Mechanics (USRMS), July 7–10, 2001
Paper Number: ARMA-01-0823
... degradation dilation PhotoModeler asperity Rock Mech shear behavior coefficient fracture permeability Rock Mechanics in the National Interest, Elsworth, Tinucci & Heasley (eds), ¸2001 Swets & Zeitlinger Lisse, ISBN 90 2651 827 7 Numerical simulations of mechanical and hydraulic behaviors of rock...
Proceedings Papers

Paper presented at the DC Rocks 2001, The 38th U.S. Symposium on Rock Mechanics (USRMS), July 7–10, 2001
Paper Number: ARMA-01-0791
..., the validity of the model is presented. The model shows typical shear behavior, namely, the shear stress increases, decreases (softening), and then gradually reaches the residual state. Moreover, variations in joint surface roughness are predicted with this model. INTRODUCTION Barton's empirical equation...
Proceedings Papers

Paper presented at the The 32nd U.S. Symposium on Rock Mechanics (USRMS), July 10–12, 1991
Paper Number: ARMA-91-1105
... model material JRC value Upstream Oil & Gas shear behavior Wellbore Design model joint ram rain cutting speed artificial joint material type identical surface characteristic artificial extension joint Rock Mechanics as a Multidisciplinary Science, Roegiers (ed.) ¸ 19910alkema...
Proceedings Papers

Paper presented at the The 31st U.S. Symposium on Rock Mechanics (USRMS), June 18–20, 1990
Paper Number: ARMA-90-0237
... ABSTRACT: A mathematical model is presented to determine the effect of boundary conditions on the shear behavior of a dilatant rock joint. The model relates the normal load-deformation response of a joint to its shear load-deformation and dilatant behavior. INTRODUCTION In two recent...
Proceedings Papers

Paper presented at the The 30th U.S. Symposium on Rock Mechanics (USRMS), June 19–22, 1989
Paper Number: ARMA-89-0107
... displacement shear behavior Goodman shear test Reservoir Characterization leichnitz stiffness boundary condition rock mass normal stiffness Rock Mechanics as a Guide for Efficient Utilization of Natural Resources, Khair (ed.) ¸ 1989 Balkema, Rotterdam. ISBN 90 6191 871 5 Effect of boundary...
Proceedings Papers

Paper presented at the The 26th U.S. Symposium on Rock Mechanics (USRMS), June 26–28, 1985
Paper Number: ARMA-85-0395-1
... an underground structure, it is required that the realistic behavior of rock joints be known for a meaningful analysis. Many investigators have worked on the refinement of the constitutive relationship for a jointed rock mass. In this investigation, an attempt was made to examine the direct shear behavior...
Proceedings Papers

Paper presented at the The 11th U.S. Symposium on Rock Mechanics (USRMS), June 16–19, 1969
Paper Number: ARMA-69-0105
... of the phenomenon of rock mass failure under stress. Probably one of the most complete investigations of the problem to date has recently been made at the University of Illinois. The study resulted in establishing a first useful working hypothesis of the shear behavior of a regularly jointed rock mass, proposed...

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