Research Article
Influence Factors’ Analysis of the Face-End Roof Leaks Exposed to Repeated Mining Based on Multiple Linear Regression
Table 5
Parameters for different rock masses tested.
| | Category | Density (kg/m3) | Cohesion (MPa) | Friction (°) | Bulk (GPa) | Shear (GPa) | Tension (MPa) |
| | Sandstone | 2368 | 5.84 | 43 | 10.12 | 9.65 | 5.08 | | Medium sandstone | 2500 | 5.90 | 42 | 7.38 | 6.96 | 4.56 | | Siltstone | 2540 | 5.20 | 40 | 6.85 | 5.47 | 3.86 | | Fine sandstone | 2600 | 4.38 | 39 | 5.27 | 4.69 | 3.35 | | Mudstone | 2550 | 1.24 | 37 | 4.16 | 2.83 | 3.02 | | Coal | 1350 | 0.50 | 30 | 3.95 | 2.20 | 1.04 |
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