Article ID Journal Published Year Pages File Type
810212 International Journal of Rock Mechanics and Mining Sciences 2008 12 Pages PDF
Abstract

The Hoek–Brown criterion parameters (σci, mi and s) are significantly influenced by the strength anisotropy of intact rock. In the present study, the criterion was modified by incorporating a new parameter (kβ) to account for the effect of strength anisotropy, thus being able to determine the strength of intact anisotropic rock under loading in different orientations of the plane of anisotropy. The range of the parameter (kβ) for the rocks tested has been analytically investigated by carrying out triaxial tests, in different orientations of the foliation plane. The proposed modification was studied for metamorphic rocks (gneiss, schist, marble), but could also be applied to other rock types exhibiting “inherent” anisotropy, e.g. sedimentary as well as igneous rocks. The proposed modified criterion is intended for use for prediction of strength of intact rock, but can also be extended to rock masses.

Related Topics
Physical Sciences and Engineering Earth and Planetary Sciences Geotechnical Engineering and Engineering Geology
Authors
, ,