Spectral Characteristics of Acoustic Emission in Loaded Coal Specimens for Failure Prediction

Spectral Characteristics of Acoustic Emission in Loaded Coal Specimens for Failure Prediction Сhanges in acoustic emission spectra of coal samples from the Kuznetsk and Pechora Basins are experimentally studied in uniaxial and triaxial (Karman-type) compression tests. It is shown that the acoustic emission spectral patterns change considerably at the pre-failure stage in the samples under uniaxial compression: the amplitudes of low-frequency components grow while those of high frequencies reduce. Under the Karman-type compression, the amplitudes of low-frequency signals grow while the high-frequency amplitudes do not change much, because lateral hydrostatic pressure impedes opening of vertical fractures. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Mining Science Springer Journals

Spectral Characteristics of Acoustic Emission in Loaded Coal Specimens for Failure Prediction

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Publisher
Pleiades Publishing
Copyright
Copyright © 2017 by Pleiades Publishing, Ltd.
Subject
Earth Sciences; Geotechnical Engineering & Applied Earth Sciences; Geophysics/Geodesy; Earth Sciences, general; Mineral Resources
ISSN
1062-7391
eISSN
1573-8736
D.O.I.
10.1134/S1062739117052825
Publisher site
See Article on Publisher Site

Abstract

Сhanges in acoustic emission spectra of coal samples from the Kuznetsk and Pechora Basins are experimentally studied in uniaxial and triaxial (Karman-type) compression tests. It is shown that the acoustic emission spectral patterns change considerably at the pre-failure stage in the samples under uniaxial compression: the amplitudes of low-frequency components grow while those of high frequencies reduce. Under the Karman-type compression, the amplitudes of low-frequency signals grow while the high-frequency amplitudes do not change much, because lateral hydrostatic pressure impedes opening of vertical fractures.

Journal

Journal of Mining ScienceSpringer Journals

Published: Jun 4, 2018

References

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