Effect of Mine Water Environment on Durability of Solid Backfilling Based on Carbonated Coal-Based Waste DOI Creative Commons
Zhishang Zhang, Liqiang Ma, Ichhuy Ngo

et al.

ACS Omega, Journal Year: 2025, Volume and Issue: 10(17), P. 17626 - 17641

Published: April 25, 2025

The durability of solid backfilling based on carbonated coal-based waste (CCBW) under mine water environments is critical for its engineering feasibility. This study investigates the deterioration mechanisms CCBW exposed to acid solution (Acid W), alkaline (Alkaline and (Mine W) through hydrochemical analysis, XRD, SEM. Results reveal that uniaxial compressive strength decreased by 10.05, 3.93, 1.62% after 28 days immersion in groups, respectively. Acid conditions induced CaCO3 dissolution gypsum formation, while triggered alkali-silica reaction expansion. Mine exhibited minimal impact due suspended particles mitigating ion exchange. Carbonation also enhanced forming dense clusters C-A-S-H gels, thus reducing leaching. Notably, average erosion resistance samples (CCBW-5, 10, 30) was 2.32% higher than noncarbonated counterparts. These findings confirm feasibility applications weakly highlight potential sustainable coal mining practices, aligning with carbon capture circular economy principles.

Language: Английский

Effect of Mine Water Environment on Durability of Solid Backfilling Based on Carbonated Coal-Based Waste DOI Creative Commons
Zhishang Zhang, Liqiang Ma, Ichhuy Ngo

et al.

ACS Omega, Journal Year: 2025, Volume and Issue: 10(17), P. 17626 - 17641

Published: April 25, 2025

The durability of solid backfilling based on carbonated coal-based waste (CCBW) under mine water environments is critical for its engineering feasibility. This study investigates the deterioration mechanisms CCBW exposed to acid solution (Acid W), alkaline (Alkaline and (Mine W) through hydrochemical analysis, XRD, SEM. Results reveal that uniaxial compressive strength decreased by 10.05, 3.93, 1.62% after 28 days immersion in groups, respectively. Acid conditions induced CaCO3 dissolution gypsum formation, while triggered alkali-silica reaction expansion. Mine exhibited minimal impact due suspended particles mitigating ion exchange. Carbonation also enhanced forming dense clusters C-A-S-H gels, thus reducing leaching. Notably, average erosion resistance samples (CCBW-5, 10, 30) was 2.32% higher than noncarbonated counterparts. These findings confirm feasibility applications weakly highlight potential sustainable coal mining practices, aligning with carbon capture circular economy principles.

Language: Английский

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