Research Article
A Supporting Design Method When Longwall FaceStrides across and Passes through a Roadway
Table 6
Parameters for granular coal.
| | Radius (m) | Density (kg/m3) | Normal stiffness (N/m) | Shear stiffness (N/m) | Friction coefficient | Cohesion (MPa) | Damp |
| | 0.1–0.2 | 1400 | 2 × 108 | 2 × 108 | 0.4 | 0 | 0.7 |
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