ERMR system and correlations with known rock mass rating systems

摘要

Excavation Rock Mass Rating (ERMR) system is developed on the basis of numerous investigationsrnfor different civil engineering and mining projects in R. Macedonia. In this system, all Rock Massesrnare divided in seven classes. For each class, an adequate technology of excavation is suggested. Beside otherrnanalyses, the correlation of ERMR with known rock mass systems is given in order to have data for parallel usernin solving of different practical problems. Notes about possible practical application of the system are analyzedrnand results presented in short. It can be underlined, that the ERMR system is more adequate for assessment ofrntype of excavation technology for soft and hard rock, while for coarse grained sedimentary rocks, somewhatrnmodified classification can be used.