A modified failure criterion for transversely isotropic rocks

作     者：Omid Saeidi Vamegh Rasouli Rashid Geranmayeh Vaneghi Raoof Gholami Seyed Rahman Torabi 

作者机构：Faculty of Mining Petroleum and Geophysics Shahrood University of Technology Department of Petroleum Engineering Curtin University Rock Mechanics Division Tarbiat Modares University Department of Chemical and Petroleum Engineering Curtin University of Technology 

出 版 物：《Geoscience Frontiers》 (地学前缘（英文版）)

年 卷 期：2014年第5卷第2期

页      面：215-225页

核心收录：

学科分类：0709[理学-地质学] 070901[理学-矿物学、岩石学、矿床学] 07[理学] 

主　　题：Transversely isotropic rock Strength anisotropy Failure criterion Triaxial test 

摘      要：A modified failure criterion is proposed to determine the strength of transversely isotropic rocks. Me-chanical properties of some metamorphic and sedimentary rocks including gneiss, slate, marble, schist, shale, sandstone and limestone, which show transversely isotropic behavior, were taken into consider-ation. Afterward, introduced triaxial rock strength criterion was modified for transversely isotropic rocks. Through modification process an index was obtained that can be considered as a strength reduction parameter due to rock strength anisotropy. Comparison of the parameter with previous anisotropy in-dexes in literature showed reasonable results for the studied rock samples. The modified criterion was compared to modified Hoek-Brown and Ramamurthy criteria for different transversely isotropic rocks. It can be concluded that the modified failure criterion proposed in this study can be used for predicting the strength of transversely isotropic rocks.