ACOUSTIC EMISSION EXPERIMENT RESEARCH FOR ROCK MASS EXCAVATION

Acoustic emission (AE) is a powerful nondestructive testing tool for examining the behavior of materials deforming under stress. It can be used as a stethoscope of fracture or damage for rock mass by listening to AE events when undergoing failure under the compressive loads. In this paper, an experimental study on the AE source location of the square cylinder granite specimens under uniaxial compression test was made. In order to obtain a three-dimensional location of AE events, eight AE sensors are mounted on the specimen. The AE source location was determined by acquisition of eight channel AE sensors after filtering, processing, reporting and visualizing seismic data. AE test provides an analysis of the microcracking activity inside the rock volume to predict jointed rock fracture patterns under uniaxial loading condition.