Results 121 to 130 of about 274 (138)

Numerical analysis of underground tunnel deformation: a case study of Midroc Lega-Dembi gold mine. [PDF]

Sci Rep
Jilo NZ, Assefa SM, Assefa E.
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An investigation on the correlation between the joint roughness coefficient (JRC) and joint roughness parameters

Construction and Building Materials, 2020
Abstract Correlation of the joint roughness coefficient (JRC) and various parameters for joint roughness evaluation was investigated in this study. A high-resolution 3D laser scanner was employed to precisely record roughness characteristics of 16 tensile fractured rock joints with different sizes.
Milad Abolfazli, Ahmad Fahimifar
exaly   +3 more sources

A new approach for quantifying the two-dimensional joint roughness coefficient (JRC) of rock joints

Environmental Earth Sciences, 2021
The joint roughness coefficient (JRC) is the key factor in predicting the peak shear strength of a rock joint. In this paper, we present a new approach for quantitatively calculating the JRC of two-dimensional rock joints. First, the two dimensionless indexes of cumulative relative relief amplitude (CRRA) and weighted average gradient (WAG) are defined
Jiandong Niu, Sun Xiaoyun
exaly   +2 more sources

Estimation of the joint roughness coefficient (JRC) of rock joints by vector similarity measures

Bulletin of Engineering Geology and the Environment, 2017
Accurate determination of joint roughness coefficient (JRC) of rock joints is essential for evaluating the influence of surface roughness on the shear behavior of rock joints. The JRC values of rock joints are typically measured by visual comparison against Barton’s standard JRC profiles. However, its accuracy is strongly affected by personal bias.
Shigui Du, Man Huang, Jun Ye
exaly   +2 more sources

A new index to describe joint roughness coefficient (JRC) under cyclic shear

Engineering Geology, 2016
Abstract Rock joint roughness coefficient (JRC) is an important parameter to determine the shear strength of unfilled hard rock joints. It is of great significance to acquire a representative value of JRC. For irregular undulated joints, the JRC has a strong directivity and surface inclination can reflect the roughness difference under the condition ...
Shengwen Qi
exaly   +2 more sources

Technical Note Estimation of the Joint Roughness Coefficient (JRC) by Visual Comparison

Rock Mechanics and Rock Engineering, 2002
The Joint Roughness Coefficient (JCR) is probably the most commonly-used measure of roughness of rock joint surfaces in current use, and forms an important part of the Barton-Bandis rock joint shear strength criterion. The normal method of evaluating the JCR of a joint is by visual comparison of measured profiles against a set of standard JCR profiles ...
D Stead
exaly   +2 more sources

Development of a new equation for joint roughness coefficient (JRC) with fractal dimension: a case study of Bakhtiary Dam site in Iran

Arabian Journal of Geosciences, 2013
The joint roughness has a significant effect on the shear behavior of rough joints, which control the shear strength of jointed rock mass. This index plays an important role in the mechanical and hydraulic properties of rock masses. There have been extensive studies in last a few decades.
Lohrasb Faramarzi, Ahmad Fahimifar, Manouchehr Sanei   +2 more
exaly   +2 more sources

Reassessing the Joint Roughness Coefficient (JRC) Estimation Using Z 2

Rock Mechanics and Rock Engineering, 2001
Z. Y. Yang, S. C. Lo, C. C. Di
exaly   +2 more sources

3DEC Simulations of Dynamic Direct Shear Tests Considering Joint Roughness Coefficient (JRC)

57th U.S. Rock Mechanics/Geomechanics Symposium, 2023
ABSTRACT In general, the dynamic properties, e.g., dynamic rock modulus and dynamic rock (shear or tensile) strength are two to three times greater than static moduli and strengths. Thus, understanding the dynamic rock characteristics is necessary to improve the design of support systems in underground mines, nearly
B. H. Kim, M. K. Larson
openaire   +1 more source

Modified 2D roughness parameters for rock joints at two different scales and their correlation with JRC

International Journal of Rock Mechanics and Minings Sciences, 2021
Weisheng Du, Chengzhi Qi, Liren Ban
exaly