The Role of In Situ Stress in Organizing Flow Pathways in Natural Fracture Networks at the Percolation Threshold

Table 1

Material properties for geomechanical computation.

Properties	Value	Unit
Density	2500	kg·m^-3
Young’s modulus	20	GPa
Poisson’s ratio	0.25	—
Internal friction coefficient	0.85	—
Intact rock cohesion	40	MPa
Tensile strength	20	MPa
Mode I energy release rate	396	J/m^2
Mode II energy release rate	495	J/m^2
Fracture initial normal stiffness	50	GPa/m
Fracture residual friction angle	30	deg
Fracture initial dilation angle	10	deg
Fluid density	1000	kg/m^3
Dynamic viscosity	0.001	Pa·s
Rock density	2650	kg/m^3
Gravity acceleration	9.8	m/s^2
Initial fracture aperture	0.1	mm
Matrix permeability		m^2