首页|A generalized nonlinear three-dimensional Hoek-Brown failure criterion

A generalized nonlinear three-dimensional Hoek-Brown failure criterion

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To understand the strengths of rocks under complex stress states,a generalized nonlinear three-dimensional(3D)Hoek-Brown failure(NGHB)criterion was proposed in this study.This criterion shares the same parameters with the generalized HB(GHB)criterion and inherits the parameter ad-vantages of GHB.Two new parameters,β,and n,were introduced into the NGHB criterion that primarily controls the deviatoric plane shape of the NGHB criterion under triaxial tension and compression,respectively.The NGHB criterion can consider the influence of intermediate principal stress(IPS),where the deviatoric plane shape satisfies the smoothness requirements,while the HB criterion not.This cri-terion can degenerate into the two modified 3D HB criteria,the Priest criterion under triaxial compression condition and the HB criterion under triaxial compression and tension condition.This criterion was verified using true triaxial test data for different parameters,six types of rocks,and two kinds of in situ rock masses.For comparison,three existing 3D HB criteria were selected for performance comparison research.The result showed that the NGHB criterion gave better prediction performance than other criteria.The prediction errors of the strength of six types of rocks and two kinds of in situ rock masses were in the range of 2.0724％-3.5091％and 1.0144％-3.2321％,respectively.The proposed crite-rion lays a preliminary theoretical foundation for prediction of engineering rock mass strength under complex in situ stress conditions.

Rock mechanicsHoek-Brown criterionFailure criterionIntermediate principal stressTrue triaxial testSmoothness and convexity

Jiaxin Wang、Shunchuan Wu、Haiyong Cheng、Junlong Sun、Xiaolong Wang、Yaxi Shen

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Faculty of Land Resource Engineering,Kunming University of Science and Technology,Kunming,650093,China

Key Laboratory of Geohazard Forecast and Geoecological Restoration in Plateau Mountainous Area,Ministry of Natural Resources,Kunming,650093,China

Yunnan Key Laboratory of Geohazard Forecast and Geoecological Restoration in Plateau Mountainous Area,Kunming,650093,China

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaYunnan Major Scientific and Technological ProjectsKey Laboratory of Geohazard Forecast and Geoecological Restoration in Plateau Mountainous Area,Ministry of Natural Resources,ChiYunnan Key Laboratory of Geohazard Forecast and Geoecological Restoration in Plateau Mountainous Area

5193400352334004202202AG050014

2024

10.1016/j.jrmge.2023.10.022

岩石力学与岩土工程学报(英文版)
中国科学院武汉岩土力学所中国岩石力学与工程学会武汉大学

岩石力学与岩土工程学报(英文版)

CSTPCD
影响因子：0.404
ISSN：1674-7755
年,卷(期)：2024.16(8)
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