CLASSIFICATION // CHARACTERIZATION OF SOME …
Reference: www.RockMass.net Dec. 2014 . CLASSIFICATION // CHARACTERIZATION OF SOME ROCK FEATURES . Engineering characteristics of main rock material:
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A guide to core logging for rock engineering - …
www.rockmass.netA guide to core logging for rock engineering . 3 . Proceedings of the Symposium on Exploration for Rock Engineering / Johannesburg / November 1976.
compressive strength and the factor m in Hoek …
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www.rockmass.netShort on the Q-system . The Q-system for rock mass classification, developed at the Norwegian Geotechnical Institute (NGI) in 1974, originally included a little more than 200 tunnel case histories, mainly from Scandinavia (Barton et al., 1974). In 1993 the system was updated to include more than 1000 cases (Grimstad and Barton, 1993).
ISRM Suggested methods - RockMass
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METHODS TO QUANTIFY THE PARAMETERS APPLIED IN …
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CLASSIFICATION // CHARACTERIZATION OF SOME ROCK …
www.rockmass.netIntact rock strength . The uniaxial compressive strength of a rock material constitutes the highest strength limit of the rock mass of which it forms a part. It is determined in accordance with the standard laboratory procedures. For the purpose of rock mass classification, the use of the well -known point load strength index can be useful as the
The RMR (Rock Mass Rating) system
www.rockmass.netCohesion of the rock mass > 400 kPa 300 - 400 kPa 200 - 300 kPa 100 - 200 kPa < 100 kPa Friction angle of the rock mass o < 45. o. 35 - o45. o. 25 - 35 15 - 25 < 15. o. Table 2: RMR classification guide for excavation and support in rock tunnels (Bieniawski, 1989).
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