Influence of principal stress effect on deformation and permeability of coal containing beddings under true triaxial stress conditions.

R Soc Open Sci · 2019 · PMC6408416 · PMID 30891271

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a decreasing trendno p-value reported

During the loading process, the coal in the ɛ 1 and ɛ 3 direction expanded, and ɛ 1 and ɛ 3 showed a decreasing trend in the numerical variations.

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