research product . 2003

Mobilised strength components in brittle failure of rock

Kaiser, P.; Hajiabdolmajid, V.; Martin, C. D.;
Open Access English
  • Published: 01 Jan 2003
  • Country: Canada
In deep underground excavations in hard rocks where stresses easily exceed the micro-crack initiation stress level inside the rock mass, proper consideration of the behaviour of rockmass during the brittle fracturing process in constitutive modelling is of paramount importance. Current empirical and conventional experimental methods for obtaining the deformational behaviours of hard rocks under loading do not lead to results that can be matched with in situ failure observations. This paper demonstrates that this problem is not necessarily a matter of the general notion of size effect but rather can be related to the different circumstances under which the cohesi...
free text keywords: Rocks/rock mechanics, Excavation
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