What does this research mean for the field?

Deep coal mining drives severe hydrogeological degradation in specific confined aquifers through the expansion of water-conducting fracture zones, which alter hydraulic connectivity and accelerate geochemical reactions, while shallower aquifers remain relatively stable. Novelty: ClaimNovelty.INCREMENTAL. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

To elucidate the spatiotemporal hydrogeological responses and controlling driving mechanisms across multi-layer aquifers throughout deep coal mining cycles.

August 24, 2026Journal of Hydrology Regional StudiesOpen Access

Multi-layer aquifer hydrogeological responses to deep coal mining and their controlling mechanisms: A hydrochemical and multi-isotope coupling study

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To elucidate the spatiotemporal hydrogeological responses and controlling driving mechanisms across multi-layer aquifers throughout deep coal mining cycles.
Coupled hydrochemical profiling with multi-isotope tracing (δ2H, δ18O, δ34S, δ18O-sulfate, and 222Rn) at the Dahaize Coal Mine in Shaanxi, China.
Tracked hydrogeological stability, vertical leakage recharge, and geochemical reactions across phreatic water, Anding Formation confined water, and Zhiluo Formation confined water.
Phreatic water and Anding Formation confined water maintained stable hydrogeological functions, experiencing minimal impact beyond localized sulfate leaching from surface coal gangue.
Zhiluo Formation confined water suffered severe degradation driven by expanding water-conducting fracture zones, which lowered hydraulic gradients and reduced groundwater flow rates.
Water-conducting fracture zones acted as preferential flow pathways and geochemical reaction interfaces, enhancing connectivity with mine water and causing enrichment of SO4(2-), δ18O, δ34S, and 222Rn.

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Implication

Hydrogeological study reveals deep coal mining degrades specific confined aquifers via fracture zones, highlighting disrupted groundwater connectivity and heightened geochemical exchange.

Cite This Study

Cui et al. (2026) studied this question.

synapsesocial.com/papers/6a8c009fbca056c88e6df71f https://doi.org/10.1016/j.ejrh.2026.103879

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Implication

Hydrogeological study reveals deep coal mining degrades specific confined aquifers via fracture zones, highlighting disrupted groundwater connectivity and heightened geochemical exchange.

Multi-layer aquifer hydrogeological responses to deep coal mining and their controlling mechanisms: A hydrochemical and multi-isotope coupling study

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Discussion

Implication

Cite This Study

Multi-layer aquifer hydrogeological responses to deep coal mining and their controlling mechanisms: A hydrochemical and multi-isotope coupling study

Key Points

Discussion

Implication

Cite This Study

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