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Open AccessArticle

Effect of Stress Path on the Failure Envelope of Intact Crystalline Rock at Low Confining Stress

1
Department of Mining Engineering, Indian Institute of Technology Kharagpur, Kharagpur WB 721302, India
2
Department of Civil and Environmental Engineering, University of Alberta, Edmonton, AB T6G 2R3, Canada
*
Author to whom correspondence should be addressed.
Minerals 2020, 10(12), 1119; https://doi.org/10.3390/min10121119
Received: 31 October 2020 / Revised: 29 November 2020 / Accepted: 4 December 2020 / Published: 13 December 2020
(This article belongs to the Special Issue The Hydro-Mechanics of Crystalline Rocks)
Numerical modelling is playing an increasing role in the interpretation of geological observations. A similar phenomenon is occurring with respect to the interpretation of the stress–strain response of intact rock measured in laboratory tests. In this research, the three-dimensional (3D) bonded particle model (BPM) with flat-jointed (FJ) contact was used to investigate the impact of stress paths on rock failure. The modified FJ contact model used for these studies numerically captured most of the intact rock behavior of Lac du Bonnet granite observed in the laboratory. A numerical simulation was used to track the behavior of this rock for different stress paths, starting with uniaxial tension and compression loading conditions. The migration from uniaxial tension to triaxial compression is challenging to simulate in physical laboratory tests but commonly observed around underground excavations. The numerical modelling methodology developed for this research tracks this stress path and the impact of the intermediate stress on peak strength at low confinements, commonly found around underground excavations. View Full-Text
Keywords: stress path; confined extension test; flat-jointed bonded particle model; intermediate principal stress stress path; confined extension test; flat-jointed bonded particle model; intermediate principal stress
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MDPI and ACS Style

Patel, S.; Martin, C.D. Effect of Stress Path on the Failure Envelope of Intact Crystalline Rock at Low Confining Stress. Minerals 2020, 10, 1119. https://doi.org/10.3390/min10121119

AMA Style

Patel S, Martin CD. Effect of Stress Path on the Failure Envelope of Intact Crystalline Rock at Low Confining Stress. Minerals. 2020; 10(12):1119. https://doi.org/10.3390/min10121119

Chicago/Turabian Style

Patel, Shantanu; Martin, C. D. 2020. "Effect of Stress Path on the Failure Envelope of Intact Crystalline Rock at Low Confining Stress" Minerals 10, no. 12: 1119. https://doi.org/10.3390/min10121119

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