Research Article
A Time-Dependent Double Hardening Model for Soft Rock
| Parameters of softrock model | Type of parameter | Typical values |
| Young’s modulus E (kPa) | Value | 800000.0 | Poisson’s ratio | Value | 0.2 | Elastic model | Type | 1 | Cyclic model | Type | 2 | Plastic model | Type | 5 | Rmax | Compression | 0.001 | Rr | Compression | 1.6 | kf | Compression | 1.1 | Rmax | Extension | 0.0005 | Rr | Extension | 1.15 | kf | Extension | 1.01 | Bcont | All | 0.3 | Ccont | All | 0.1 | Α | Isotach | 1.15 | M | Isotach | 0.035 | ε′ir-ref | Isotach | 0.1e − 9 | Cohesion (kN/m2) | Value | 1230 | Friction | Degree | 12 | Dilatancy parameter | Value | 900 | Dilatancy cutoff | Value | 0.10 | Unit weight, γt, (kN/m3) | Value | 19 |
|
|