Research Article
Experiment and Application of Coalcrete on Roadway Stability: A Comparative Analysis
Table 2
Coal measure rock mass properties.
| | Lithology unit | Rock properties by indoor test | Field observation | Rock mass properties by formula conversion | | mi | σci (MPa) | Poisson’s ratio (υ) | Ei (GPa) | RMR | GSI | c (MPa) | ϕ (°) | σt (MPa) | Emass (GPa) |
| | Sandstone | 9 | 85.8 | 0.22 | 18.6 | 72 | 67 | 3.45 | 42 | 0.79 | 12.5 | | Mudstone | 9 | 38.5 | 0.29 | 3.61 | 40 | 35 | 1.24 | 27 | 0.03 | 0.4 | | Coal | 30 | 7.0 | 0.39 | 5.0 | 35 | 30 | 0.98 | 24 | 0.15 | 0.50 |
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