Permeability evolution and modeling analysis of anisotropic coal under different stress paths
Baoyu Wei, Hongbao Zhao, Lu Gao · 2025
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Description
Coal seams leak gas through natural cracks, and how much they leak depends on the squeeze of the rock around them. Baoyu Wei and co-authors probe that dependence with true-triaxial tests. They stressed coal samples along four different paths and measured flow in three directions. The direction along the face cleats, the main fracture set, carried far more gas than the others.
Unloading the smallest stress while raising the other two made permeability jump and fluctuate. Raising the middle stress, by contrast, suppressed new fractures. The team compared mathematical models of the behavior. One model tracked the wild swings best. The work speaks to gas extraction: knowing which stress path opens coal, and which seals it, guides how engineers drain gas safely and efficiently.
Catalog record
| CREATOR | Baoyu Wei, Hongbao Zhao, Lu Gao |
|---|---|
| YEAR | 2025 |
| COLLECTION | PAPERS |
| FORMAT | TXT |
| FILE SIZE | 39 KB |
| VERSION | 1.0 |
| LICENSE | CC BY 4.0 |
| RIGHTS | CC BY |
| SOURCE | Europe PMC |