Complex study of acoustoemission and thermomechanical effects in samples of rock salt at their cyclic deformation

The paper presents the results of uniaxial compression tests on rock salt specimens, involving successive load/unload cycles, with the maximum stress increasing from cycle to cycle. Changes in mechanical characteristics, infrared radiation (IR) variations, and acoustic emission (AE) were measured. The goal of the experiment was to study how the parameters of AE and IR radiations change during the process of rock deformation, modes of testing taken into account at that. The experimental time dependences of mechanical and physical parameters are analyzed, as well as relationships between mechanical parameters and physical characteristics. It is established that IR measurements can be used to study the effect of the loading history on the deformation behavior and strength characteristics of geomaterial specimens (the memory effect). Analysis of changes in the intensity of thermal radiation of geomaterials under cyclic loading suggests that it is possible to practically apply the discovered effects in combination with well-established techniques of quantitative estimation of stresses in rock masses, which are based on the acoustic emission and deformation memory effects.

Blokhin D. I., Kharchenko A. V. Complex study of acoustoemission and thermomechanical effects in samples of rock salt at their cyclic deformation. MIAB. Mining Inf. Anal. Bull. 2021;(4-1):129—137. [In Russ]. DOI: 10.25018/0236_1493_2021_41_0_129.

Blokhin D. I.^1,2, Cand. Sci. (Eng.), dblokhin@yandex.ru;
Kharchenko A. V.², Cand. Sci. (Eng.), av-kharchenko@yandex.ru;
¹ National Research Technological University “MISiS”, Moscow, Russia;
² Institute of Comprehensive Exploitation of Mineral Resources Russian Academy of Sciences, Moscow, Russia.

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