TY - GEN
T1 - Numerical simulation of strength and deformation behavior of inherently anisotropic rocks
AU - Kwok, C. Y.
AU - Duan, K.
AU - Tham, L. G.
N1 - Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].
PY - 2014
Y1 - 2014
N2 - Rock anisotropy is one of the most distinctive features that must be considered in rock mechanics. In this study, two-dimensional discrete element simulations are conducted to investigate the strength and deformation behavior of inherently anisotropic rocks which display different behaviors in response to load with respect to the different orientations of the plane of weakness. In the numerical model, intact rock is represented by bonding rigid particles at their contacts together. The inherent anisotropy is modeled by artificially removing any parallel bonds dipping around a certain angle to the loading direction and replacing them with smooth joint contacts. The numerical model is validated by comparing the strength and elastic modulus with previous experimental results. The failure patterns can be classified into: split cross weak layers, shear along weak layers and split along weak layers, which also agree with that observed in laboratory. The angle range plays an important role on the response of numerical model which can be used to represent the degree of anisotropy. The numerical model proposed in this study provides a new way to investigate the mechanical behavior of anisotropic rock. Future studies can be carried Out to investigate the strength criterion of anisotropic rock based on this approach. Copyright © 2014 ARMA, American Rock Mechanics Association.
AB - Rock anisotropy is one of the most distinctive features that must be considered in rock mechanics. In this study, two-dimensional discrete element simulations are conducted to investigate the strength and deformation behavior of inherently anisotropic rocks which display different behaviors in response to load with respect to the different orientations of the plane of weakness. In the numerical model, intact rock is represented by bonding rigid particles at their contacts together. The inherent anisotropy is modeled by artificially removing any parallel bonds dipping around a certain angle to the loading direction and replacing them with smooth joint contacts. The numerical model is validated by comparing the strength and elastic modulus with previous experimental results. The failure patterns can be classified into: split cross weak layers, shear along weak layers and split along weak layers, which also agree with that observed in laboratory. The angle range plays an important role on the response of numerical model which can be used to represent the degree of anisotropy. The numerical model proposed in this study provides a new way to investigate the mechanical behavior of anisotropic rock. Future studies can be carried Out to investigate the strength criterion of anisotropic rock based on this approach. Copyright © 2014 ARMA, American Rock Mechanics Association.
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M3 - RGC 32 - Refereed conference paper (with host publication)
SN - 9781634395236
VL - 2
T3 - 48th US Rock Mechanics / Geomechanics Symposium 2014
SP - 1311
EP - 1317
BT - 48th US Rock Mechanics / Geomechanics Symposium 2014
PB - American Rock Mechanics Association (ARMA)
T2 - 48th US Rock Mechanics / Geomechanics Symposium 2014: Rock Mechanics Across Length and Time Scales
Y2 - 1 June 2014 through 4 June 2014
ER -