| Micromechanics Parameters | Values |
| Ballast density (kg/m3) | 2600 |
| Ballast particle normal and shear contact stiffness (N/m) | 1 × 108 |
| Wall normal and shear contact stiffness (N/m) | 1 × 109 |
| Particle friction coefficient | 0.5 |
| Wall friction coefficient | 0.5 |
| Radius of particles (mm) | 22.4 - 63 |