In coal-rock formations, many micro-fractures exist, and the expansion of these micro-fractures is the internal catalyst for the macroscopic destruction of coal-rock. Moreover, the occurrence state of gas changes with the expansion of micro-fractures.
Researchers reveal influence of cyclic dynamic disturbance on coal-rock evolution and zoning retrieved 17 June 2024 from https://phys.org/news/2024-06-reveal-cyclic-dynamic-disturbance-coal.html
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