Numerical Simulation on the Basic Rules of Multihole Linear Codirectional Hydraulic Fracturing

Table 1

Parameters used in this numerical simulation.

Name of parameter	Value and unit	Name of parameter	Value and unit
Tension strength	1.64 MPa	Internal friction angle	31.2°
Elastic modulus	0.72 MPa	Residual strength	0.1%
Proportion of tensile strength and compressive strength	3.8	Pore water coefficient	0.1
Permeability coefficient	0.0006 m/d	Maximum compression strain coefficient	200
Maximum tension strain coefficient	1.5	Angle between the line of the borehole’s core and direction of maximum principle stress	15°
Initial water pressure	0 MPa	Increased water pressure for each step	0.2 MPa
Horizontal principal stress	6 MPa	Vertical principal stress	4 MPa