August 14, 2025Applied SciencesOpen Access

Strength Deterioration and Sensitivity Analysis of Coal Samples Under Different Immersion Times for Underground Water Reservoirs

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Experimental analysis shows strength deterioration of coal samples in groundwater, indicating moisture sensitivity effects.

Uniaxial compressive strength of coal samples decreased significantly from 29.17 MPa to 7.38 MPa with increasing moisture content.
Moisture content of coal samples rises with immersion time, reaching saturation after about 72 hours, affecting mechanical properties.
Sensitivity analysis reveals four stages of mechanical performance evolution in water-immersed coal samples based on moisture content.
Groundwater erosion exacerbates internal cracking and deterioration of coal's mechanical properties under varying immersion conditions.

Li et al. (2025) studied this question.

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