ABSTRACT
Rock mass classification has come to be associated with the need to select a rock mass class on the basis of prior classification or rating of various rock mass parameters. Most frequently, classification is used in association with tunnel support, and also as a basis for payment. It may also reflect a need for pre-treatment. Implicit here is the existence of the tunnel, and the effect this may have on the expected rock mass response, in particular that within the EDZ. All of the above may also apply to rock slopes, but here post-treatment is more likely.
