Application of acoustic measurement data to characterize initiation and development of disintegration focus in a rock mass

Resumo

A new approach to local rockburst hazard problems and rockburst prediction is demonstrated in terms of acoustic measurements in two mine workings of Joint Kirov Mine, Apatit Co. The new approach is based on spectrum–correlation analysis of acoustic emission signals, on the one hand, and on the Griffith−Irwin fracture model, on the other hand. Acoustic emission signals are recorded using Prognoz-L new-generation portable system for local rockburst hazard monitoring. Prognoz-L provides digital recording and processing of a wide range of acoustic signal parameters. The analysis of spectrum parameters of the recorded signals confirms applicability of the innovative software/hardware system to predict dynamic events in rock masses.