E3S Web Conf.
Volume 109, 2019International Conference Essays of Mining Science and Practice
|Number of page(s)||5|
|Published online||09 July 2019|
The electromagnetic radiation of extremely compressed coals
Institute of Geotechnical Mechanics named by N. Poljakov of National Academy of Sciences of Ukraine, 49005, Dnipro, Simferopolska Str., 2a, Ukraine
* Corresponding author: email@example.com
The article investigates the nature of changes in the level of radiation and absorption of electromagnetic oscillations by coal samples that are in an extremely stressful state. When performing the work, a stand of studying electromagnetic oscillations was assembled for different levels of compression stress of the rock. The results of changes in the amplitude of electromagnetic oscillations in the frequency range 0.5-1.5 and 66–110 MHz for different values of compressive stresses of coal samples are given. It is shown that before the destruction of an extremely compressed coal sample, the level of electromagnetic oscillations decreases by a factor of 3 or more. This phenomenon can be used to predict sudden outbursts of coal and gas. It has been established that exposure to electromagnetic radiation of low energy intensity on the rock in the frequency range 0.5–1.5 and 66–110 MHz can be used as a tool for changing the stress-strain state of the rock in the modes of resonance of electromagnetic oscillations of the system “technogenic source of electromagnetic radiation — extremely stressful rock”.
© The Authors, published by EDP Sciences, 2019
This is an open access article distributed under the terms of the Creative Commons Attribution License 4.0 (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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