Research Article
Study on Rules of Fault Stress Variation Based on Microseismic Monitoring and Numerical Simulation at the Working Face in the Dongjiahe Coal Mine
Table 2
The mechanics and physical parameter statistics of rocks in model.
| | Rock stratum | Elasticity modulus (MPa) | Compressive strength (MPa) | Thickness (m) | Friction angle (°) | Poisson’s ratio (−) | Class density (kg/m³) |
| 1 | Medium grain sandstone | 8500 | 29 | 13 | 28 | 0.26 | 2450 | 2 | Fine siltstone | 8200 | 35 | 41 | 28 | 0.26 | 2450 | 3 | Medium grain sandstone | 8500 | 29 | 12 | 28 | 0.26 | 2450 | 4 | Fine siltstone | 8200 | 35 | 15 | 28 | 0.26 | 2450 | 5 | Medium grain sandstone | 8500 | 29 | 10 | 28 | 0.26 | 2450 | 6 | Fine siltstone | 8200 | 35 | 13 | 28 | 0.26 | 2450 | 7 | Medium grain sandstone | 8500 | 29 | 14 | 28 | 0.26 | 2450 | 8 | Fine siltstone | 8200 | 35 | 33 | 28 | 0.26 | 2450 | 9 | Medium grain sandstone | 8500 | 29 | 8 | 28 | 0.26 | 2450 | 10 | Coarse siltstone | 8800 | 45 | 13 | 26 | 0.24 | 2450 | 11 | Fine siltstone | 8200 | 35 | 21 | 28 | 0.26 | 2450 | 12 | Fine grain sandstone | 7800 | 24 | 4 | 29 | 0.28 | 2450 | 13 | Coal | 1650 | 8 | 2 | 36 | 0.32 | 1500 | 14 | Coarse siltstone | 8800 | 45 | 8 | 26 | 0.24 | 2450 | 15 | Fine grain sandstone | 7800 | 24 | 6 | 29 | 0.28 | 2450 | 16 | Medium grain sandstone | 8500 | 29 | 4 | 28 | 0.26 | 2450 | 17 | Fine grain sandstone | 7800 | 24 | 3 | 29 | 0.28 | 2450 | 18 | Coal | 1650 | 8 | 2 | 36 | 0.32 | 1500 | 19 | Quartz sandstone | 8850 | 48 | 38 | 25 | 0.24 | 2650 | 20 | Fault | 1000 | 7 | — | 28 | 0.26 | 2000 |
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