Research Article
A Coupled Gas Flow-Mechanical Damage Model and Its Numerical Simulations on High Energy Gas Fracturing
Table 1
Parameters used in numerical simulations.
| | Mechanical property | Value |
| | Elasticity modulus of rock sample | 17 GPa | | Poisson’s ratio | 0.32 | | UCS of rock sample | 107 MPa | | Tensile strength of rock sample | 10 MPa | | Homogeneity index of mesoscopic element | 5 | | Mean elastic modulus of mesoscopic element | 19 GPa | | Mean UCS of mesoscopic element | 246 MPa | | Mean tensile strength of mesoscopic element | 25 MPa | | Frictional angle | 49° | | Density of rock sample | 2600 kg m−3 | | Permeability of intact rock | -20 m2 | | Porosity of intact rock | 0.01 | | Dynamic viscosity of gas (air) | -5 Pa s | | Density of gas (air) at standard condition | 1.17 kg m−3 | | Gas pressure at standard condition | 0.1 MPa | | Source term for gas flow Qs | 0 kg m−3 s-1 |
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