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Hoek-Brown failure criterion – 2002 Edition
Hoek and Brown [1, 2] introduced their failure criterion in an attempt to provide input data for the analyses required for the design of underground excavations in hard rock. The criterion was derived from the results of research into the brittle failure …
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Rock mass properties - Rocscience Inc.
www.rocscience.comcoefficient of determination 2 r are calculated from: n x ... The influence of sample size upon rock strength has been widely discussed in geotechnical literature and it is generally assumed that there is a significant reduction in strength with increasing sample size. Based upon an analysis of published data, Hoek and
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