Research Article
Mechanisms of Crack Initiation and Propagation in Dense Linear Multihole Directional Hydraulic Fracturing
Table 3
Material parameters of the model.
| | Mechanics and seepage parameter | Rock stratum |
| | Homogeneous degree | 4 | | Mean of compressive strength σ0 (MPa) | 75 | | Mean of elastic modulus E0 (GPa) | 30 | | Poisson ratio μ | 0.25 | | Internal friction angle φ (°) | 30 | | Pressure-tension ratio | 10 | | Porosity ratio | 0.1 | | Seepage coefficient K (m/d) | 0.01 | | Pore water pressure (MPa) | 0.1 | | Coupling coefficient | 0.1 | | Damage mutation coefficient | 5 |
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