Research Article

Study of the Rock Crack Propagation Induced by Blasting with a Decoupled Charge under High In Situ Stress

Table 1

RHT material parameters for rock.

ParameterValue

Mass density (kg/m3)2260
Elastic shear modulus (GPa)21.9
Eroding plastic strain2.0
Parameter for polynomial EOS B01.22
Parameter for polynomial EOS B11.22
Parameter for polynomial EOS T1 (GPa)25.7
Failure surface parameter A1.60
Failure surface parameter N0.61
Compressive strength (MPa)167.8
Relative shear strength0.18
Relative tensile strength0.10
Load angle dependence factor Q00.68
Load angle dependence factor B0.01
Parameter for polynomial EOS T2 (GPa)0.0
Reference compressive strain rate3.0E − 5
Reference tensile strain rate3.0E − 6
Break compressive strain rate3.0E + 25
Break tensile strain rate3.0E + 25
Compressive strain rate dependence exponent0.032
Tensile strain rate dependence exponent0.036
Volumetric plastic strain fraction in tension0.001
Compressive yield surface parameter0.53
Tensile yield surface parameter0.70
Shear modulus reduction factor0.50
Damage parameter D10.04
Damage parameter D21.0
Minimum damaged residual strain0.01
Residual surface parameter AF1.60
Residual surface parameter NF0.61
Gruneisen gamma0.0
Hugoniot polynomial coefficient A1 (GPa)35.27
Hugoniot polynomial coefficient A2 (GPa)39.58
Hugoniot polynomial coefficient A3 (GPa)9.04
Crush pressure (MPa)125
Compaction pressure (GPa)6.0
Porosity exponent3.0
Initial porosity1.0