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<p>A burnt rock aquifer threatens the safe mining of underlying coal seams. Understanding the height and evolution mechanisms of the water-conducting fractured zone (WFZ) is critical for preventing water inrush disasters and protecting water resources. Focusing on the S1233 panel at the Ningtiaota Coal Mine, where an overlying burnt rock aquifer jeopardizes mining safety, this study comprehensively estimates the WFZ height under completed extraction conditions using empirical and theoretical methods. With two theoretical methods applied based on the key stratum theory, the predicted WFZ height indicated that mining of the S1233 panel had a serious risk of water inrush. Then, a similar material model was established. The characteristics of strata failure, movement, and fracture evolution during working face advancement were systematically analyzed through experimental results. In addition, a critical threshold for water inrush disasters was determined by coupling the relationship between the advance distance and aquifer pressure. Finally, specific water hazard control measures were proposed based on the evolution features of water-conducting fractures. The results of this study provide valuable insights for roof water hazard management in coal mines.</p>

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Evolution Mechanism of a Water-Conducting Fractured Zone for Coal Mining Beneath a Burnt Rock Aquifer

  • 期刊论文

  • 发表日期：

    2026年5月21日

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  • Shidong Wang,
  • Ziyuan Liu,
  • Kaipeng Zhu,
  • Dongsheng Zhang,
  • Liqiang Ma,
  • Hai Wang,
  • Jianggen He,
  • Xinyi Wang,
  • Zhiwei Ye

摘要

A burnt rock aquifer threatens the safe mining of underlying coal seams. Understanding the height and evolution mechanisms of the water-conducting fractured zone (WFZ) is critical for preventing water inrush disasters and protecting water resources. Focusing on the S1233 panel at the Ningtiaota Coal Mine, where an overlying burnt rock aquifer jeopardizes mining safety, this study comprehensively estimates the WFZ height under completed extraction conditions using empirical and theoretical methods. With two theoretical methods applied based on the key stratum theory, the predicted WFZ height indicated that mining of the S1233 panel had a serious risk of water inrush. Then, a similar material model was established. The characteristics of strata failure, movement, and fracture evolution during working face advancement were systematically analyzed through experimental results. In addition, a critical threshold for water inrush disasters was determined by coupling the relationship between the advance distance and aquifer pressure. Finally, specific water hazard control measures were proposed based on the evolution features of water-conducting fractures. The results of this study provide valuable insights for roof water hazard management in coal mines.