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Geomechanics and Engineering Volume 3, Number 1, March 2011 , pages 61-81 DOI: https://doi.org/10.12989/gae.2011.3.1.061 |
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A complement to Hoek-Brown failure criterion for strength prediction in anisotropic rock |
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Mohammad Hossein Bagheripour, Reza Rahgozar, Hassan Pashnesaz and Mohsen Malekinejad
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| Abstract | ||
| In this paper, a complement to the Hoek-Brown criterion is proposed in order to derive the strength of anisotropic rock from strength of the corresponding truly intact rock. The complement is a decay function, which unlike other modifications or suggestions made in the past, is multiplied to the function of the original Hoek-Brown failure criterion for intact rock. This results in a combined and extended form of the criterion which describes the strength of anisotropic rock as a varying fraction of the corresponding truly intact rock strength. Statistical procedures and in particular regression analyses were conducted into data obtained in experiments conducted in the current research program and those collected from the literature in order to define the Hoek-Brown | ||
| Key Words | ||
| Hoek-Brown criterion; anisotropic rock; complement; strength prediction. | ||
| Address | ||
| Mohammad Hossein Bagheripour, Reza Rahgozar: Dept. of Civil Engineering, Shahid Bahonar University of Kerman, Kerman, Iran Hassan Pashnesaz: Tadbir Kavosh Mining and Industrial Research Centre, Shiraz, Iran Mohsen Malekinejad: Dept. of Civil Engineering, Shahid Bahonar University of Kerman, Kerman, Iran | ||