Research Article
Mining-Induced Pressure-Relief Mechanism of Coal-Rock Mass for Different Protective Layer Mining Modes
Table 1
Mechanical parameters of mining seam.
| | Coal-rock | Density (kg/m3) | Elastic modulus (GPa) | Deformation modulus (GPa) | Poisson’s ratio | Tensile strength (MPa) |
| | Coal | 1380 | 2.08 | 1.62 | 0.18 | 0.9 | | Mudstone | 2410 | 4.791 | 4.193 | 0.233 | 2.4 | | Sandstone | 2700 | 10.25 | 9.419 | 0.315 | 4.2 |
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