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<p>As coal mining extends to greater depths, the risk of water inrush from highly confined aquifers increases greatly, which seriously threatens mine safety and critically hampers the safe and efficient extraction of China’s coal resources. This paper focuses on the limestone aquifer water-inrush risks in Taoyuan Coal Mine’s coal seams, presents aquifer-modification control measures, and evaluates the effectiveness of these control measures. The study found that: (1) the average thickness of the aquitard between the limestone aquifer group and the No. 10 coal seam is only 56.4 m; these limestone aquifers could cause water inrushes. (2) The Taiyuan Formation aquifer receives direct recharge from the Ordovician limestone aquifer through connecting water-conducting channels in mining area II2. (3) After grouting was applied to the three-limestone aquifer, the water level elevation decreased from the maximum observed value of − 31.1 m to a range of −125.9 to − 242.7 m, reaching the normal water level. This demonstrates that the grouting effectively eliminated the high-water level anomaly in the treatment area and target stratum, successfully transforming the three-limestone aquifer into a relatively impermeable layer (aquitard). Furthermore, the grouting completely and effectively sealed the water-conducting channels from the Ordovician limestone to the No. 10 coal seam. These results provide useful evidence of coal mine water hazard prevention and control for mines with similar geological conditions.</p>

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Risk Assessment and Prevention Strategies for Floor Water Inrush: A Case Study of the No. 10 Coal Seam in Taoyuan Coal Mine, China

  • 期刊论文

  • 发表日期：

    2026年5月18日

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  • Maolin Xing,
  • Wei Wang,
  • Shaolei Zhao,
  • Jishi Geng

摘要

As coal mining extends to greater depths, the risk of water inrush from highly confined aquifers increases greatly, which seriously threatens mine safety and critically hampers the safe and efficient extraction of China’s coal resources. This paper focuses on the limestone aquifer water-inrush risks in Taoyuan Coal Mine’s coal seams, presents aquifer-modification control measures, and evaluates the effectiveness of these control measures. The study found that: (1) the average thickness of the aquitard between the limestone aquifer group and the No. 10 coal seam is only 56.4 m; these limestone aquifers could cause water inrushes. (2) The Taiyuan Formation aquifer receives direct recharge from the Ordovician limestone aquifer through connecting water-conducting channels in mining area II2. (3) After grouting was applied to the three-limestone aquifer, the water level elevation decreased from the maximum observed value of − 31.1 m to a range of −125.9 to − 242.7 m, reaching the normal water level. This demonstrates that the grouting effectively eliminated the high-water level anomaly in the treatment area and target stratum, successfully transforming the three-limestone aquifer into a relatively impermeable layer (aquitard). Furthermore, the grouting completely and effectively sealed the water-conducting channels from the Ordovician limestone to the No. 10 coal seam. These results provide useful evidence of coal mine water hazard prevention and control for mines with similar geological conditions.