Application of Acoustic Measurement Data to Characterize Initiation and Development of Damage in Rock Mass
I. YU. RASSKAZOV1, S. V. TSIREL’2, A. O. ROZANOV2, A. A. TERESHKIN1, A. V. GLADYR’1
1Institute of Mining, Far East Branch, Russian Academy of Sciences, ul. Turgeneva 51, Khabarovsk, 680000 Russia
2Saint-Petersburg Mining University, 21-Line V.O. 2, Saint-Petersburg, 199106 Russia
Keywords: динамические проявления горного давления, геомеханика, сейсмика, акустическая эмиссия, механика трещинообразования, спектрально-корреляционный анализ случайных процессов, dynamic rock pressure events, geomechanics, seismology, acoustic emission, fracturing mechanics, spectrum-correlation analysis of random processes
Abstract
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. 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 new-generation portable system Prognoz-L 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.
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