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Spectral Analysis of Pulse-induced Acoustic Field in Rocks and Its Applications

Rozanov A O;Savel'ev V N ;and Stanchits S A(A .F.loffe Physicotechnical Institute,Russian Academy of sciences,Russia)  
In this work,the frequency analysis of the natural vibrations of a solid of finite dimensionsregarded as the response to the pulse action has been carried out.The vibrations were registered by thephotoelasticity method allowing one to determine the mechanical stress in the wave.The obatainedinformation about the natural vibrational field was used for the interpretation of the acoustic emissionspectra excited during cracks uncleation in the in homogeneous rock formation.The main applications ofgeo-acoustic spectral methods is to detect massif discontinuities formed by macro-cracks or byboundaries of rocks of different lithology,ist is useful for localizing these discontinuities and is actual fordamage prediction in mines.This results may guide to get the imaging in rocks with various frequency,and getting some comparison with the seismic spectra for natural earthquakes.
【CateGory Index】: P585.1,P585.1
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