Estimation of stress and strain development in limestone samples by acoustic emission response to local thermal effect

Authors: Oshkin R.

The article presents the experimental studies into interactions between parameters of acoustic emission stimulated in limestone by a series of local thermal effects, on the one side, and the change in the incrementally increasing quasi-static mechanical loading applied to limestone, on the other hand. The design and instrumentation of the appropriate laboratoryscale plant are discussed. The theoretical justification is given to the found variation patterns of thermally stimulated acoustic emission (TAE) as a function of stress state evolution in limestone. For the numerical estimate of the patterns, a set of acoustic emission indicators is proposed. The informativity of the indicators is proved by the agreement of the results obtained in representative number of thermal loading tests to failure of sample. A brief analysis of the acoustic emission mechanisms in hard rocks subjected to thermal loading is given. The author’s interpretation is provided for the physical meaning of the acoustic emission indicators used in this study. The technical approaches to processing of the source experimental measurement information are developed. The findings offer a background for adapting the TAE method to in-situ monitoring control of evolution of stresses and strains in rocks.

Keywords: acoustic emission, thermal stimulation of informative response, quasi-static mechanical loading, stress state, monitoring control.
For citation:

Oshkin R. Estimation of stress and strain development in limestone samples by acoustic emission response to local thermal effect. MIAB. Mining Inf. Anal. Bull. 2020;(11):118127. [In Russ]. DOI: 10.25018/0236-1493-2020-11-0-118-127.

Issue number: 11
Year: 2020
Page number: 118-127
ISBN: 0236-1493
UDK: (620.179.17+621.3.082.4):550.3:622.83
DOI: 10.25018/0236-1493-2020-11-0-118-127
Article receipt date: 06.07.2020
Date of review receipt: 30.07.2020
Date of the editorial board′s decision on the article′s publishing: 10.10.2020
About authors:

Roman Oshkin, Graduate Student, e-mail:, National University of Science and Technology «MISiS», 119049, Moscow, Russia.


For contacts:

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