Rp. Young et Cd. Martin, POTENTIAL ROLE OF ACOUSTIC-EMISSION MICROSEISMICITY INVESTIGATIONS INTHE SITE CHARACTERIZATION AND PERFORMANCE MONITORING OF NUCLEAR WASTEREPOSITORIES, International journal of rock mechanics and mining sciences & geomechanics abstracts, 30(7), 1993, pp. 797-803
An experimental tunnel was excavated at the 420-m depth at Atomic Ener
gy of Canada Limited's (AECL) Underground Research Laboratory (URL) to
investigate rock mass response to excavation-induced stress changes.
The results show how the development of excavation-induced damage can
be monitored and characterized remotely and non-destructively by exami
ning acoustic emission/microseismicity (AE/MS). Geological mapping, co
nventional instrumentation and video camera monitoring were used to va
lidate the seismic interpretation. In addition, we describe an AE/MS l
aboratory test designed to study thermally-induced damage from emplace
ment of a simulated nuclear waste container within the rock.