Research Article
Coal and Gas Outburst Affected by Law of Small Fault Instability during Working Face Advance
Table 2
Numerical analysis of joint parameters.
| | Stratum | Normal stiffness (GPa) | Shear stiffness (GPa) | Friction angle (°) | Cohesion (MPa) | Tensile strength (MPa) |
| | Mudstone | 1.5 | 0.8 | 15 | 0.2 | 2.3 | | Sandy mudstone | 2 | 1 | 17 | 0.42 | 2.2 | | Medium sandstone | 6 | 4 | 18 | 0.87 | 7.6 | | Mudstone | 1.5 | 0.8 | 15 | 0.2 | 2.3 | | Fine sandstone | 4 | 4 | 20 | 0.93 | 8.31 | | Sandy mudstone | 1.5 | 1 | 12 | 0.14 | 1.02 | | Coal | 0.3 | 0.1 | 12 | 0.14 | 1.02 | | Sandy mudstone | 2 | 1 | 22 | 0.35 | 2.3 | | Medium sandstone | 6 | 4 | 15 | 0.47 | 2.5 | | Siltstone | 4 | 4 | 17 | 0.39 | 3.8 |
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