A complement to Hoek-Brown failure criterion for strength prediction in anisotropic rock

Mohammad Hossein Bagheripour , Reza Rahgozar , Hassan Pashnesaz , Mohsen Malekinejad

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

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