Research Article
A Fractal and Numerical Simulation Coupled Study of Fracture Network during Coal Mining Excavation
Table 1
Mechanical properties of rocks.
| Rock | Property | E/GPa | | Thickness/m | Note |
| Sand and soil | 15 | 0.29 | 50 | 5 m of each layer | Siltstone | 36 | 0.2 | 10 | key stratum | Mudstone | 16 | 0.22 | 12 | 2 m of each layer | Fine sandstone | 19 | 0.17 | 5/7 | Inferior key stratum and floor | Coal | 8.8 | 0.23 | 3 | Excavation objects | Coarse sandstone | 16 | 0.20 | 13 | Roof, 3.25 m of each layer |
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