Technical Summary of AECL's Mine-by Experiment. Phase 1. Excavation Response(Resume du Rapport Technique d'EACL sur l'Essai au Voisinage de l'Excavation. Phase 1. Reaction a l'Excavation)

摘要

The first phase of the Mine-by Experiment was conducted at the 420 Level of theUnderground Research Laboratory (URL) to investigate the response induced in the rock mass by excavating a 3.5-m-diameter circular tunnel using a non-exclusive technique. The main objective of the experiment was to study the processes involved in progressive failure and the development of excavation-induced damage around underground openings. To this end, state-of-the-art geochemical and geophysical instrumentation was used to monitor the excavation of the 46-m-long Mine-by Experiment test tunnel.