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Keywords: intermediate principal stress
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Proceedings Papers

Paper presented at the ISRM International Symposium - 10th Asian Rock Mechanics Symposium, October 29–November 3, 2018
Paper Number: ISRM-ARMS10-2018-227
... at angle β = (45+ ϕ /2)° and ω = 90°. For all the other orientations, the strength is observed to be more than this critical orientation. It is also observed that intermediate principal stress enhances the strength and its influence on foliation or joint is negligible when its orientation is...
Proceedings Papers

Paper presented at the ISRM International Symposium - 10th Asian Rock Mechanics Symposium, October 29–November 3, 2018
Paper Number: ISRM-ARMS10-2018-128
... characteristics of rock. With the increase of the intermediate principal stress, the strength of the rock increases significantly under true triaxial stress state. The influences of intermediate principal stress on the failure process of layered rocks are different for different bedding interface angles. 1...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - 7th Asian Rock Mechanics Symposium, October 15–19, 2012
Paper Number: ISRM-ARMS7-2012-027
... observed in the test data sets. Reservoir Characterization strength hoek-brown failure surface failure surface intermediate principal stress Upstream Oil & Gas Pietruszczak failure criterion rock failure criterion new criterion hoek-brown failure criterion criterion hoek-brown...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - 7th Asian Rock Mechanics Symposium, October 15–19, 2012
Paper Number: ISRM-ARMS7-2012-059
... ABSTRACT The objective of this study is to determine the effects of intermediate principal stresses on the tensile strength of rocks. The laboratory testing involves four-point bending test, Brazilian tests with axial compression, circular plate bending test. Uniaxial, biaxial and triaxial...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - 7th Asian Rock Mechanics Symposium, October 15–19, 2012
Paper Number: ISRM-ARMS7-2012-056
... development. In this paper, we describe about the importance of laboratory experiment, especially useful advantage for adopting True Triaxial Test to investigate the effect of the intermediate principal stress. We focus on the importance of the intermediate principal stress and introduce the observations...
Proceedings Papers

Paper presented at the ISRM International Symposium - 6th Asian Rock Mechanics Symposium, October 23–27, 2010
Paper Number: ISRM-ARMS6-2010-019
... intermediate principal stress confines the rock in such a way that fractures can only be initiated and propagated in the direction parallel to σ1 and σ2. The effect of σ2 is related to the stress-induced anisotropic properties, and the end effect at the interface between the rock surface and loading platen in...

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