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<p>This study investigates the seepage characteristics of isolated and interconnected fractures, focusing on the effects of fracture geometry (width, length, dip angle) and physical properties (porosity, roughness) on fluid flow. Key findings reveal that fracture width is the dominant factor, with seepage velocity increasing by five orders of magnitude as width expands from 0.1 mm to 10 mm. Longer fractures enhance flow, particularly in wider fractures, while dip angle influences flow paths, peaking at 30°for 10 mm fractures and 60°for 1 mm fractures. Roughness reduces permeability, decreasing seepage velocity by 90% as the coefficient rises from 0.03 to 0.15. Interconnected fractures exhibit preferential flow with higher permeability, whereas isolated fractures restrict flow. Porosity improvements significantly boost seepage, especially at 30%. The results provide insights for karst aquifer management, groundwater pollution control, and sustainable water resource development.</p>

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Numerical simulation study on the influence of fracture geometry and physical properties on fluid seepage characteristics

  • 期刊论文

  • 发表日期：

    2025年7月1日

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  • Shuai Gao,
  • Wei Pang,
  • Junbo Sheng,
  • Bo Zhou,
  • Bo Li

摘要

This study investigates the seepage characteristics of isolated and interconnected fractures, focusing on the effects of fracture geometry (width, length, dip angle) and physical properties (porosity, roughness) on fluid flow. Key findings reveal that fracture width is the dominant factor, with seepage velocity increasing by five orders of magnitude as width expands from 0.1 mm to 10 mm. Longer fractures enhance flow, particularly in wider fractures, while dip angle influences flow paths, peaking at 30°for 10 mm fractures and 60°for 1 mm fractures. Roughness reduces permeability, decreasing seepage velocity by 90% as the coefficient rises from 0.03 to 0.15. Interconnected fractures exhibit preferential flow with higher permeability, whereas isolated fractures restrict flow. Porosity improvements significantly boost seepage, especially at 30%. The results provide insights for karst aquifer management, groundwater pollution control, and sustainable water resource development.