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THERMAL SCIENCE
International Scientific Journal
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EVOLUTION CHARACTERISTICS OF CRACKS AROUND BOREHOLES FOR GAS EXTRACTION IN DEEP COAL SEAMS
ABSTRACT
The study of crack evolution characteristics of perforated coal bodies under different water contents is crucial for efficient deep gas extraction. In this paper, based on digital image technology, we calculate the grayscale characteristic parameters of the whole process of destruction of perforated coal and quantitatively characterize the crack evolution law. The results show that the crack evolution of the coal body around the borehole decreases with the increase of water content.
KEYWORDS
PAPER SUBMITTED: 2025-06-01
PAPER REVISED: 2025-09-01
PAPER ACCEPTED: 2025-09-17
PUBLISHED ONLINE: 2026-07-18
DOI REFERENCE: https://doi.org/10.2298/TSCI250601106J
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© 2026 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 4.0 International licence