Research Article
A New Mining Scheme for Hanging-Wall Ore-Body during the Transition from Open Pit to Underground Mining: A Numerical Study
Table 2
Mechanical and numerical control parameters of the models.
| | | Parameter | Value |
| | Physical parameters | Density | 2780 kg/m3 | | Young’s modulus | 28 Gpa | | Poisson’s ratio | 0.25 | | Joint cohesion (before/after failure) | 0.22 MPa/0 MPa | | Joint tensile strength (before/after failure) | 0.15 MPa/0 MPa | | Joint friction angle (before/after failure) | 36°/30° | | Kinematic condition (before/after excavation) | Static/Dynamic |
| | Numerical control parameters | Time-step (before/after excavation) | 0.001 s/0.0001 s | | Displacement ratio (before/after excavation) | 0.001/0.001 | | Normal/shear spring stiffness | 350 GPa/140 GPa |
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