Research Article
Failure Mechanism of Gob-Side Roadway under Overlying Coal Pillar Multiseam Mining
Table 1
Mechanical parameters of coal and rock layer.
| | Strata | Density (kg/m−3) | Elastic modulus (GPa) | Shear modulus (GPa) | Cohesion (MPa) | Internal friction angle (°) | Tensile strength (MPa) | Poisson ratio |
| | Basic roof | 2873.00 | 18.00 | 11.54 | 3.09 | 30.22 | 3.40 | 0.24 | | Immediate roof | 2680.00 | 12.91 | 7.68 | 1.60 | 29.98 | 2.35 | 0.22 | | Coal seam | 1380.00 | 3.93 | 3.12 | 1.23 | 28.00 | 1.11 | 0.29 | | Immediate floor | 2680.00 | 12.91 | 7.68 | 1.60 | 29.98 | 2.25 | 0.22 | | Basic roof | 2873.00 | 18.00 | 11.54 | 3.09 | 30.22 | 3.40 | 0.24 |
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