Unified Analytical Solutions of Circular Tunnel Excavated in an Elastic-Brittle-Plastic Rock Mass considering Blast-Induced Damage and Dead Weight Loading

Table 2

The geometry and rock parameters used in this study.

Geometry and rock parameters	Value
In situ stress, (MPa)	15
Tunnel radius, (m)	3
Rock gravity, (kN/m^3)	27.5
Dilatancy angle, (°)	0
Initial elastic modulus, (GPa)	2.2
Initial cohesive, (MPa)	5
Initial friction angle, (°)	30
Initial Poisson’s ratio ()	0.25
Residual elastic modulus, (GPa)	1.6
Residual cohesive, (MPa)	3.6
Residual friction angle, (°)	24
Residual Poisson’s ratio ()	0.25
Damage elastic modulus, (GPa)	0.44
Damage cohesive, (MPa)	1.0
Damage friction angle, (°)	6
Damage Poisson’s ratio ()	0.25