Research Article
Failure Mechanism and Stability Control of Surrounding Rock of Docking Roadway under Multiple Dynamic Pressures in Extrathick Coal Seam
Table 3
Rock mechanics parameters of the coal seam.
| | Coal seam | Bulk modulus (GPa) | Shear modulus of elasticity (GPa) | Density (kg/m-3) | The angle of internal friction (°) | Dilatancy angle (°) |
| | 9# | 6.86 | 5.53 | 1800 | 10 | 4 | | 12# | 6.86 | 5.53 | 1800 | 11 | 6 | | 16# | 6.86 | 5.53 | 1800 | 9 | 3 |
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