Thermographic study of rock samples in dynamic fracture

Underground mineral mining is often faced with the problems connected with an increase on overburden pressure either because of thickness of overlying rock strata, or due to regional and local tectonics. However, the increase in the overburden pressure can be induced by the incorrect mining system. There are many different geomechanical and geophysical methods for monitoring high overburden pressure zones to date in the modern world. This paper describes the temperature tests of rock samples from Luginskoe deposit in Transbaikalia. The temperature was measured after the samples reached the ultimate uniaxial compression strength. From the test results, the temperature change at the ultimate compression strength was observed in 30 % of the samples. The temperature measurement tests show that there is a certain correlation between the temperature and stress state of rocks, which implies potential usability of thermography for studying rock mass condition. The method of thermography can be used for the noncontact real-time local stress estimate in underground mines by means of recording temperature changes induced by overburden pressure using a thermal imager.

Tereshkin A. A., Rasskazov M. I., Tsoi D. I., Konstantinov A. V., Anikin P. A. Thermographic study of rock samples in dynamic fracture. MIAB. Mining Inf. Anal. Bull. 2021;(12—1):204—212. [In Russ]. DOI: 10.25018/0236_1493_2021_121_0_204.

The studies were carried out using the resources of the Center for Shared Use of Scientific Equipment “Center for Processing and Storage of Scientific Data of the Far Eastern Branch of the Russian Academy of Sciences”, funded by the Russian Federation represented by the Ministry of Science and Higher Education of the Russian Federation under project No. 075—15—2021—663.

Tereshkin A. A.¹, researcher;
Rasskazov M. I.¹, researcher;
Tsoi D. I.¹, researcher,
Konstantinov A. V.¹, researcher,
Anikin P. A.¹, Cand. Sci. (Eng.), leading researcher,
¹ Mining Institute of the Far Eastern branch of Russian Academy of Sciences, Khabarovsk, Russia.

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