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<p>Sudden water inrush accidents in deep coal seam floors are typically induced by the combined effects of high-pressure water and structural damage to rock masses. Understanding the evolution of such disasters provides a theoretical foundation for utilizing microseismic monitoring in water hazard early warning systems. In this study, an in-depth investigation was conducted using a self-improved true triaxial loading system in conjunction with acoustic emission (AE) techniques and numerical simulations. Results revealed that the water inrush process has three primary stages: the first stage involves pressurized damage to aquifers with a number of AE events; the second stage involves increased water pressure inducing structural activation of the floor with prominent AE events, and; the third stage involves the permeation of the floor's aquiclude into a roadway, leading to a gradually decrease in AE events. For faults with different dip angles, their activation corresponds to variations in pore water pressure and water inrush pathways. Specifically, the results are as follows: under the same pore water pressure, high-angle faults are more likely to be activated than low-angle faults, thereby increasing the risk of water inrush. Regarding the water-conducting pathways, high-angle faults exhibit nearly vertical water-conducting pathways, whereas low-angle faults demonstrate water-conducting pathways that extend approximately along the fault's strike direction.</p>

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Evolution Mechanism of Water-Conducting Channels and Disaster Triggering Induced by Fault Zone Failure in a Mining Roadway

  • 期刊论文

  • 发表日期：

    2025年3月3日

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  • Jian Chen,
  • Lianchong Li,
  • Wenqiang Mu,
  • Xin Wang,
  • Bo Ren

摘要

Sudden water inrush accidents in deep coal seam floors are typically induced by the combined effects of high-pressure water and structural damage to rock masses. Understanding the evolution of such disasters provides a theoretical foundation for utilizing microseismic monitoring in water hazard early warning systems. In this study, an in-depth investigation was conducted using a self-improved true triaxial loading system in conjunction with acoustic emission (AE) techniques and numerical simulations. Results revealed that the water inrush process has three primary stages: the first stage involves pressurized damage to aquifers with a number of AE events; the second stage involves increased water pressure inducing structural activation of the floor with prominent AE events, and; the third stage involves the permeation of the floor's aquiclude into a roadway, leading to a gradually decrease in AE events. For faults with different dip angles, their activation corresponds to variations in pore water pressure and water inrush pathways. Specifically, the results are as follows: under the same pore water pressure, high-angle faults are more likely to be activated than low-angle faults, thereby increasing the risk of water inrush. Regarding the water-conducting pathways, high-angle faults exhibit nearly vertical water-conducting pathways, whereas low-angle faults demonstrate water-conducting pathways that extend approximately along the fault's strike direction.