International Scientific Journal


In order to explore the evolution of coal cracks during nitrogen injection, the resistivity response tests of coal during nitrogen injection were carried out. The research shows that during the nitrogen injection process, the resistivity of the coal remains basically unchanged at first, then increases slowly, and increases suddenly and stabilizes at about 1.2 finally. The nitrogen adsorption of coal leads to a decrease in resistivity, and the higher the nitrogen pressure is, the greater the decrease in resistivity will be. The development of fissures in the coal will affect the conduction channel, resulting in an increase in resistivity. In the process of nitrogen injection, the resistivity change of the loaded coal is the result of the combined effect of the nitrogen adsorption of coal and the expansion of the fissures of the coal.
PAPER REVISED: 2022-12-04
PAPER ACCEPTED: 2022-12-11
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THERMAL SCIENCE YEAR 2023, VOLUME 27, ISSUE Issue 1, PAGES [513 - 520]
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© 2023 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence