... Abstract The mechanical behaviors of rock joints with and without rock bolt are essential for ensuring the safety of rock engineering and determining support scheme in jointed rock masses. This paper experimentally investigated the shear behavior of unbolted and bolted artificial rough joints...

... Abstract: Anisotropy shear behaviors of shale are obvious as many bedding planes exist in shale. Determining the shear failure behavior of shale is essential for predicting fracture growth geometry and shear fracture permeability. This paper investigates the mechanical properties of bedding...

... 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...

... 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...

... normal loading condition. However, it is widely accepted that the shear strength of rock joints is controlled by the inherent stiffness of the rock. In this paper, experimental study of the shear behavior of joint under constant normal load (CNL) and constant normal stiffness (CNS) were undertaken...

.... At surface and shallow depth, failure often occurs by shearing along existing discontinuities. Therefore, understanding the shear behavior of rock joints is a basic requirement to describe the complex behavior of jointed rock masses. With the rapid progress of computer technology, many attempts have been...

.... 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...

... and cyclic shear behaviors were numerically simulated and compared with the test results of rough rock joint specimens. Characteristic shear behaviors of rock joint could be well simulated by utilizing the degradation of first and second order asperities. Variations of joint permeability with the shear...

..., 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...

... 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...

... 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...

... 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...

... 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...

... 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...