Study on the effect of acid fracturing fluid on pore structure of middle to high rank coal.

Sci Rep · 2025 · PMC11736128 · PMID 39814819

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showed a trendno p-value reported

As coal rank increased, fractal dimension D 1 also showed a trend of initial increase followed by decrease, with the peak at coking coal.

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a decreasing trendno p-value reported

Gas coal and fat coal exhibited a decreasing trend in average pore size, whereas lean coal showed an increase (about 14%), influenced by mineral content dictating new pore formation and thereby affecting average pore sizes.

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