Sensitization of ultrasonic stress control in rock mass by heating

Conventional ultrasonic stress–strain behavior control often lacks precision due to low acoustic strain sensitivity—the characteristic of change in P-wave velocity in rocks during deformation. The previous experimental evidence implies that heating of rocks can enhance essentially their strain sensitivity. Using the obtained patterns, a method is developed for the stress–strain behavior control in adjacent rocks at the extended precision of determination of mechanical stresses along a preset direction. The method efficiency and application range are estimated at a laboratory scale. The tests were carried out on 7 types of rocks, with different structure, density and porosity, as well as on the model duralumin D16T sample with no defects (zero imperfection). Each sample was subjected to ultrasonic sounding at the assigned temperature (from 25 to 100 °С) and mechanical effect (from 0 to 10 MPa). The obtained informative parameters were used to determine the strain sensitivity index of a sample material. The largest variation in the strain sensitivity under higher temperatures is typical of rocks possessing high modulus of elasticity and low ratio of porosity. The ultrasound attenuation analysis shows that the main cause of the increasing acoustic strain sensitivity is the temperature-induced microfissuring.

Keywords: thermobaric effect, rocks, strain sensitivity, ultrasound, control, stress state.
For citation:

Nikolenko P. V., Shkuratnik V. L., Chepur M. D. Sensitization of ultrasonic stress control in rock mass by heating. MIAB. Mining Inf. Anal. Bull. 2021;(11):159-168. [In Russ]. DOI: 10.25018/0236_1493_2021_11_0_159.


This work was financially supported by the Russian Foundation for Basic Research (project No. 19-05-00152).

Issue number: 11
Year: 2021
Page number: 159-168
ISBN: 0236-1493
UDK: 622.02:539.2
DOI: 10.25018/0236_1493_2021_11_0_159
Article receipt date: 19.07.2021
Date of review receipt: 01.09.2021
Date of the editorial board′s decision on the article′s publishing: 10.10.2021
About authors:

P.V. Nikolenko1, Cand. Sci. (Eng.), Assistant Professor, e-mail:,
V.L. Shkuratnik1, Dr. Sci. (Eng.), Professor,
M.D. Chepur1, Graduate Student, e-mail:,
1 National University of Science and Technology «MISiS», 119049, Moscow, Russia.


For contacts:

P.V. Nikolenko, e-mail:


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