Research Article
Stability Control and Quick Retaining Technology of Gob-Side Entry: A Case Study
Table 1
The rock mechanics parameters of the numerical simulation model.
| | Lithology | Layer thickness (m) | Density (kg·m−3) | Volume modulus (GPa) | Shear modulus (GPa) | Cohesion (MPa) | Tensile strength (MPa) | Internal friction angle (°) |
| | Fine sandstone | 15.0 | 2700 | 11.6 | 9.0 | 12.6 | 6.2 | 35 | | Medium sandstone | 15.0 | 2510 | 4.8 | 2.5 | 8.7 | 3.8 | 24 | | Fine sandstone | 3.0 | 2700 | 5.8 | 3.0 | 13.9 | 8.2 | 29 | | Siltstone | 10.0 | 2700 | 2.7 | 1.4 | 4.2 | 2.9 | 32 | | No. 3 upper coal | 2.0 | 1340 | 2.4 | 1.0 | 4.2 | 1.4 | 20 | | Mudstone | 1.5 | 2300 | 1.6 | 1.0 | 4.5 | 1.8 | 23 | | Siltstone and fine sandstone | 6.0 | 2700 | 3.9 | 1.2 | 10.6 | 4.0 | 27 | | Siltstone | 27.5 | 2510 | 2.8 | 1.3 | 12.8 | 5.3 | 28 | | Artificial wall | 3.0 | 2500 | 16.7 | 12.5 | 10.0 | 4.2 | 55 |
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