Research Article
Spatial and Temporal Distribution Law and Influencing Factors of the Mining-Induced Deformation and Failure of Gas Boreholes
Table 5
Parameters for backfilling wall materials.
| | Density (kg·m−3) | Bulk modulus (GPa) | Shear modulus (GPa) | Cohesion (MPa) | Internal friction (°) | Tensile strength (MPa) |
| C20 | 2000 | 2.2 | 0.9 | 3 | 20 | 0.75 | C30 | 2300 | 2.4 | 1.3 | 4.2 | 22 | 1.05 | C40 | 2500 | 2.7 | 1.7 | 5.4 | 24 | 1.35 |
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