Research Article

Damage Evolution and Circumferential Strain Distribution Characteristics of the Bolt-Supported Cavern under Multiple Explosion Sources

Table 2

The parameters for the RHT model of the rock mass.

ParameterValue

Mass density RO (kg/m3)1700
Initial porosity ALPHA0.0
Crush pressure PEL (GPa)0.0
Compaction pressure PCO (GPa)0.36
Hugoniot polynomial coefficient A1 (GPa)2.1162
Hugoniot polynomial coefficient A2 (GPa)2.3748
Hugoniot polynomial coefficient A3 (GPa)0.5424
Parameter for polynomial EOS B01.22
Parameter for polynomial EOS B11.22
Parameter for polynomial EOS T1 (GPa)2.1162
Parameter for polynomial EOS T2 (GPa)0.0
Elastic shear modulus SHEAR (GPa)1.002
Compressive strength FC (MPa)2.1
Relative tensile strength FT0.1
Relative shear strength FS0.18
Failure surface parameter A1.6
Failure surface parameter N0.61
Lode angle dependence factor Q00.6805
Lode angle dependence factor B0.0105
Porosity exponent NP0.0
Reference compressive strain-rate EOC3.0E − 11
Reference tensile strain rate EOT3.0E − 12
Break compressive strain rate EC3.0E + 19
Break tensile strain rate ET3.0E + 19
Compressive strain rate dependence exponent BETAC0.032
Tensile strain rate dependence exponent BETAT0.036
Volumetric plastic strain fraction in tension PTF0.001
Compressive yield surface parameter GC0.53
Tensile yield surface parameter GT0.7
Erosion plastic strain EPSF2.0
Shear modulus reduction factor XI0.5
Damage parameter D10.04
Damage parameter D21.0
Minimum damaged residual strain EPM0.01
Residual surface parameter AF1.6
Residual surface parameter NF0.61
Gruneisen gamma GAMMA0.0