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<p>With the continuous expansion of underground mining, studying the characteristics of fracture seepage is of great significance for seepage prevention and control. This paper simulates the deep mining-induced stress loading path and conducts triaxial seepage tests on fractured conglomerates with different roughness levels. Fracture morphology data were obtained through 3D scanning, and the self-developed FSPS (Fracture Seepage Path Search) algorithm was used to analyze the evolution patterns of seepage paths. The results show that during the hydrostatic pressure stage, compression of the specimens causes the seepage channels to narrow, leading to a continuous increase in seepage water pressure; during the unloading stage, the specimens’ radial strain shifts from compression to expansion, resulting in a short-term permeability increase of 5% to 25%. Seepage causes an overall increase in fracture surface roughness, with more significant roughness growth observed on fracture surfaces with higher initial JRC (Joint Roughness Coefficient) values. There is a significant coupling relationship between seepage and roughness; as roughness increases, permeability exhibits a negative exponential decline. In the early stages of the test, seepage paths appear as branched tree-like structures, gradually evolving into planar or networked forms later on. Seepage path types can be mainly classified as planar, network, trunk, and various composite types. The findings of this study contribute to a better understanding of seepage characteristics and water flow behavior in fractured rocks with varying roughness under underground mining conditions, providing valuable guidance for seepage prevention and management in underground mining operations.</p>

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Research on the seepage characteristics of fractured rock with different roughness during mining processes

  • 期刊论文

  • 发表日期：

    2026年3月20日

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  • Jiabo Geng,
  • Xiaobing Wang,
  • Yunmin Wang,
  • Cunyang Liu,
  • Siying Zheng,
  • Shibin Tang

摘要

With the continuous expansion of underground mining, studying the characteristics of fracture seepage is of great significance for seepage prevention and control. This paper simulates the deep mining-induced stress loading path and conducts triaxial seepage tests on fractured conglomerates with different roughness levels. Fracture morphology data were obtained through 3D scanning, and the self-developed FSPS (Fracture Seepage Path Search) algorithm was used to analyze the evolution patterns of seepage paths. The results show that during the hydrostatic pressure stage, compression of the specimens causes the seepage channels to narrow, leading to a continuous increase in seepage water pressure; during the unloading stage, the specimens’ radial strain shifts from compression to expansion, resulting in a short-term permeability increase of 5% to 25%. Seepage causes an overall increase in fracture surface roughness, with more significant roughness growth observed on fracture surfaces with higher initial JRC (Joint Roughness Coefficient) values. There is a significant coupling relationship between seepage and roughness; as roughness increases, permeability exhibits a negative exponential decline. In the early stages of the test, seepage paths appear as branched tree-like structures, gradually evolving into planar or networked forms later on. Seepage path types can be mainly classified as planar, network, trunk, and various composite types. The findings of this study contribute to a better understanding of seepage characteristics and water flow behavior in fractured rocks with varying roughness under underground mining conditions, providing valuable guidance for seepage prevention and management in underground mining operations.