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N2-protected thermal reconstruction of Pan-3 Mine soft coal: pore-fracture evolution for gas drainage
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DOI：10.1016/j.csite.2026.108386.png)
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Abstract
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• Pan-3 Mine soft coal was used to examine heating-aided gas drainage. • Temperature changed pore volume and pore size more strongly than residence time. • Heating reduced fine-pore adsorption area and enlarged flow-relevant pore volume. • A relative index was used to rank pore-structure improvement. • Results guide thermal-stimulation parameter selection for gas drainage.
Keywords:
Thermal stimulation
Soft coal
Pore–fracture structure
Gas drainage
Fractal analysis
Coalbed methane
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