Shock and Vibration / 2019 / Article / Tab 3

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 parameterRock stratum

Homogeneous degree4
Mean of compressive strength σ0 (MPa)75
Mean of elastic modulus E0 (GPa)30
Poisson ratio μ0.25
Internal friction angle φ (°)30
Pressure-tension ratio10
Porosity ratio0.1
Seepage coefficient K (m/d)0.01
Pore water pressure (MPa)0.1
Coupling coefficient0.1
Damage mutation coefficient5