The electromagnetic radiation of extremely compressed coals

摘要

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”.