... ABSTRACT: Joint roughness is one of the most important factors which decide the shear behavior of a rock mass. Conventionally, it is quantified into a parameter called Joint Roughness Coefficient (JRC) by visual comparison between Barton’s standard profiles and line profiles of a joint. Since...

..., hundreds of profiles were measured with JRC values calculated for each profile. Through this process, the variability of JRC values based on two-dimensional profiles across a surface is highlighted. Finally the effectiveness of cylindrical core scans is evaluated by comparing the roughness estimates...

... and failure profile in direct shear test and on the stress relaxation behavior in the post-failure region. Reservoir Characterization rock joint shear plane JRC viscous behavior normal stress strength specimen plane Upstream Oil & Gas direct shear test failure plane time-dependent...

...1 1. INTRODUCTION The surface morphology of rock joints [1] significantly influences both the rock mass strength and the flow conductivity. The Joint Roughness Coefficient (JRC) scheme was proposed together with the empirical equation of shear strength by Barton (1973) [2], which was illustrated...

... utilizing Joint Roughness Coefficient (JRC) profiles which were proposed by Barton and Choubey [2]. Discussion by various researchers [1, 3, 4] has revealed potential sources of errors in estimating JRC values by visually comparing discontinuity profiles with a rock discontinuity surface, including user...

... Abstract: The influence of different sampling spacing was investigated by applying the estimation of Joint Roughness Coefficient (JRC) and Profile Mean Angle (? p ) values based on the rock joint surface three dimension model. Laser scanner was employed to gather the original data of joint...

...), proposed the following approximation: peak = 0.004 L0.6 (2) Analysis of data published by Bandis et al. [8] indicates that the ratio peak/L is related to the JRC of the particular length of fractures tested, and that improved fit to the data is obtained with the following equation [7]: peak = L 500...

... ABSTRACT: The grout flow through rock mass discontinuities has usually been simulated with a laminar flow. In the laminar flow through a micro-channel, however, the flow is significantly dependent on the roughness of the channel surfaces. The effect of the joint roughness coefficient (JRC...

... Rock Mech equation JRC rock fracture Magnitude 1. INTRODUCTION The mechanical behavior of jointed rock masses is strongly affected by the behavior of fractures. Several empirical and theoretical constitutive models [1-19] were developed to simulate the behavior of rock fractures. Many...

... coefficient (JRC) is an accepted concept for the description of rock surface roughness. Laboratory procedures are available which allow JRC to be determined for relatively small samples of a rock surface. Fractal geometry is also useful for the description of roughness. A correlation has been found between...