RMR rock mass rating

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• Rock Mass Rating system — The Rock Mass Rating (RMR) system is a geomechanical classification system for rocks, developed by T.Z. Bieniawski between 1972 and 1973. Definition The following six parameters are used to classify a rock mass using the RMR system #Uniaxial… …   Wikipedia

• Mining rock mass rating — Laubscher developed the Mining Rock Mass Rating (MRMR)[1][2][3][4][5] system by modifying the Rock Mass Rating (RMR) system of Bieniawsk …   Wikipedia

• Rock mass classification — In geotechnical engineering, the first major rock mass classification system was proposed about 60 years ago for tunnelling with steel support. Later classification systems were developed for non steel support underground excavation, slope and… …   Wikipedia

• Rock Quality Designation — (RQD) was developed in 1964 by D. U. Deere. It is based on measuring core recovery percentage which incorporates only pieces that are greater than 100 mm in length. In this respect pieces of core that are not hard and sound should not be counted… …   Wikipedia

• RMR — RMR, a three letter acronym meaning: *Registered Merit Reporter, a certification offered by the National Court Reporters Association *Resting Metabolic Rate, see basal metabolic rate *Rock Mass Rating system *Royal Marines Reserve *The Royal… …   Wikipedia

• RMR-Wert — Der RMR Wert oder RMR Index (Rock Mass Rating) ist ein Klassifizierungssystem für Felsgestein. Er wurde 1972/1973 von Z. T. Bieniawski entwickelt. Das System wird in der Geotechnik bei Tunneln, Kavernen, Bergwerken, Böschungen, Fundamenten usw.… …   Deutsch Wikipedia

• Core recovery parameters — describe the quality of core recovered from a borehole. Contents 1 Total core recovery 2 Solid core recovery 3 Rock quality designation 3.1 Classificat …   Wikipedia