College of Mining, National University of Science and Technology MISIS, Moscow, Russia:

L. V. Shkuratnik, Professor, Doctor of Engineering Sciences
E. A. Novikov, Associate Professor, Candidate of Engineering Sciences, novikov@misis.ru

The article is devoted to the analysis of the state-of-the-art research into structure, properties and condition of rocks using the method of thermally stimulated acoustic emission (TAE). The method consists in measurement and interpretation of acoustic emission induced in a geomedium by thermal treatment. It is shown that the growing interest in this method rests upon the fact that TAE, unlike the conventional mechanical loading, enables remote treatment of objects under investigation. Accordingly, TAE method creates no contact acoustic noise and imposes no strict standards on size and shape of specimens, or quality of their surfaces, which makes it possible to assume this geocontrol approach nondestructive and highly informative at the same time. This article is the first to collect and generalize results of domestic and foreign theoretical and experimental investigations of TAE in rocks of various genotypes for the last 25 years. The state of the art of research into different mechanisms of TAE initiation and development in a geomedium with regard to the modes of heating is discussed. The theoretical TAE models required for evaluation of efficient algorithms and measurement experimentation conditions as well as for adequate interpretation of the results are reviewed. The data of experimental works on TAE regularities in geomaterials depending on their composition, structural damage, physico-mechanical properties and stress–strain state are systematized. The authors inform on the geocontrol techniques that are based on the obtained regularities. The scope of the discussion also embraces potential trends of development of TAE method and its applications in the field of mining geophysics.
The study has been supported by the Russian Foundation for Basic Research, Grant No. 16-05-00033 А.

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