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This study examines the influence of caved coal-rock masses on the migration and release of characteristic pollutants， such as Fe and Pb， in mine water. First， the composition， structure， and surface element distribution of coal and gangue were comprehensively characterized using SEM mapping， XRD， XRF， and IR techniques. Subsequently， static immersion experiments were conducted to assess various influencing factors， including different pH values， immersion times， and particle sizes of coal and rock. The migration and release patterns of Fe and Pb ions were determined using ICP analysis. Finally， low-temperature nitrogen adsorption experiments were performed to elucidate the mechanisms underlying the migration and release of these pollutants. The results indicate that: (1) In deionized water， gangue is the primary source of Fe ions， with the amount released influenced by particle size and immersion time; specifically， smaller particle sizes lead to higher Fe release during the initial immersion stage. The source of Pb ions is affected by the combined action of coal and gangue; while the presence of gangue enhances Pb release， no significant relationship was found between the amount of Pb released and gangue content. (2) Under mine water conditions， coal has minimal impact on the concentration of Fe ions in the water， and other ions present inhibit the release rate of Fe from gangue; Pb release is jointly regulated by both coal and gangue. (3) Low-temperature nitrogen adsorption experiments reveal that the migration and release of metal ions such as Fe and Pb in mine water are significantly influenced by the pore structures of coal and gangue. In summary， controlling iron pollution in mine water should focus on the particle size of gangue and the inhibitory effects of other ions on iron release， whereas lead pollution control requires a comprehensive consideration of the interactions between coal and gangue. This study provides a theoretical basis and technical support for the in-situ purification and resource utilization of mine water.
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Basic Information:
DOI：10.13637/j.issn.1009-6094.2026.0548
China Classification Code:X752
Citation Information:
[1]Lu Kaixuan,Luo Qing,Sun Daoning ,et al.Effects of caved coal and rock on adsorption and release of characteristic pollutants in mine water from the Pingdingshan Mining Area[J].Journal of Safety and Environment().DOI:10.13637/j.issn.1009-6094.2026.0548.
Fund Information:
国家重点研发计划资助项目（2024YFC3013904）; 深地工程智能建造与健康运维全国重点实验室开放基金课题（SDGZ2527）; 煤矿冲击地压机理与防控技术国家矿山安全监察局重点实验室开放基金项目（KFJJ–2025–0011）; 辽宁省“兴辽英才计划”项目（XLYC2203141）
2026-08-04
2026-08-04
2026-08-04