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- Title
Effects of granularity and clay content on the permeability of the fault core in the Renlou coal mine in China: implications for underground water inrush.
- Authors
Gui, Hui; Xu, Jinpeng; Zhang, Yudong; Li, Yang
- Abstract
Fault core can act as a fine groundwater seepage conduit or barrier in coal mines in China. The material properties including the granularity and clay mineral content contribute to the complexity of the fault core's hydrogeological characteristics, especially its permeability. Seven fault core samples in Renlou coal mine were collected for clay mineral analysis and water saturation tests. The tests revealed distinct inhomogeneous particle size and porous media feature of fault core samples after water saturation for 14 days and different expansibility values ranged from 1.842 to 8.294%. The Darcy tests showed that the permeability weakening ratio increased as a power function in relation to the final expansion ratio. Finally, it was concluded that if the total mudstone thickness was greater in the entire faulted stratum section, the fault core was more impermeable and acted as a seepage barrier.
- Publication
Arabian Journal of Geosciences, 2021, Vol 14, Issue 4, p1
- ISSN
1866-7511
- Publication type
Article
- DOI
10.1007/s12517-021-06645-y