Numerical Investigation on the Mechanism of Rock Directional Fracturing Method Controlled by Hydraulic Fracturing in Dense Linear Multiholes

Table 2

Numerical simulation parameters.

Rock mass	Parameter
The uniaxial compressive strength of rock mass	20 MPa
Elastic modulus	8000 MPa
Internal friction angle	30°
Porosity	0.10
Infiltration coefficient	0.01 m/d
Ratio of tension and compression	10
Maximal coefficient of tensile strain	1.50
The initial value of water-injection pressure	0
Homogeneity	1000
Poisson’s ratio	0.25
Coupled coefficient	0.20
The coefficient of pore pressure	0.30
Residual strength	0.10%
The maximal coefficient of compressive strain	200
The increment of water pressure	0.30 MPa