Cracking mechanisms in granite rocks subjected to uniaxial compression by moment tensor analysis of acoustic emission

In underground engineering structures, rock mass stability is influenced by the excavation with the stress concentrated at the roof and side wall. In this paper, acoustic emission (AE) technique and moment tensor (MT) analysis were both applied to study the behavior of coarse-grained granite samples, containing an inverted U-shaped opening, which were subjected to uniaxial compression. The resolved micro-crack types were presented in terms of...