Rock mass classification - Rocscience Inc.
a. Rock type origin (igneous, metamorphic, sedimentary). b. Rock hardness (hard, medium, soft, decomposed). c. Geologic structure (massive, slightly faulted/folded, moderately faulted/folded, intensely faulted/folded). 2. Parameter B, Geometry: Effect of discontinuity pattern with respect to the direction of . the tunnel drive on the basis of: a.
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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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