Study on the Influences of Empty Hole and In Situ Stress on Blasting-Induced Rock Damage

Table 2

Parameters for the RHT model for rock.

Parameter	Value	Parameter	Value
Density	2660 kg/m^3	Reference compressive strain rate E0C
Shear modulus	17 GPa	Reference compressive strain rate E0T
Erosion plastic strain	2.0	Break compressive strain rate EC
Parameter for polynomial EOS B0	1.22	Break tensile strain rate ET
Parameter for polynomial EOS B1	1.22	Compressive strain rate dependence exponent	0.025
Parameter for polynomial EOS T1	43.87 GPa	Tensile strain rate dependence exponent	0.045
Parameter for polynomial EOS T2	0	Pressure influence on plastic flow in tension	0.001
Hugoniot polynomial coefficient A1	43.87 GPa	Compressive yield surface parameter GC	0.85
Hugoniot polynomial coefficient A2	49.40 GPa	Tensile yield surface parameter GT	0.4
Hugoniot polynomial coefficient A3	11.62 GPa	Shear modulus reduction factor	0.25
Failure surface parameter A	2.50	Damage parameter D1	0.025
Failure surface parameter N	0.85	Damage parameter D2	1.0
Compressive strength	150 MPa	Minimum damaged residual strain	0.01
Relative shear strength	0.07	Residual surface parameter AF	2.5
Relative tensile strength	0.05	Residual surface parameter AN	0.85
Lode angle dependence factor Q0	0.72	Gruneisen gamma	0
Lode angle dependence factor B	0.01	Crush pressure	133 MPa
Compaction pressure	6 GPa	Porosity exponent	3
Initial porosity	1.0