Research Article
The Role of In Situ Stress in Organizing Flow Pathways in Natural Fracture Networks at the Percolation Threshold
Table 1
Material properties for geomechanical computation.
| Properties | Value | Unit |
| Density | 2500 | kg·m-3 | Young’s modulus | 20 | GPa | Poisson’s ratio | 0.25 | — | Internal friction coefficient | 0.85 | — | Intact rock cohesion | 40 | MPa | Tensile strength | 20 | MPa | Mode I energy release rate | 396 | J/m2 | Mode II energy release rate | 495 | J/m2 | Fracture initial normal stiffness | 50 | GPa/m | Fracture residual friction angle | 30 | deg | Fracture initial dilation angle | 10 | deg | Fluid density | 1000 | kg/m3 | Dynamic viscosity | 0.001 | Pa·s | Rock density | 2650 | kg/m3 | Gravity acceleration | 9.8 | m/s2 | Initial fracture aperture | 0.1 | mm | Matrix permeability | | m2 |
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