The study of mechanical properties and fracture evolution of coal-rock masses under hard roof-soft floor conditions.

Sci Rep · 2025 · PMC11775345 · PMID 39875464

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an increasing trendno p-value reported

The coal-rock combination samples RCR-1, RCR-2, RCR-3, and RCR-4 exhibit correlation dimensions that generally indicate an increasing trend with significant fluctuation amplitudes.

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