Research Article
Study on Plastic Zone Distribution Characteristic of Coal and Rock Mass in Excavation from Crosscut Coal
Table 1
Mechanical parameters of the model.
| | Stratum | Thickness | Internal friction angle (°) | Elasticity modulus (GPa) | Bulk modulus (GPa) | Shear modulus (GPa) | Tensile strength (MPa) | Cohesion | Density |
| | Mudstone | 12 | 26 | 2 | 11.8 | 3.9 | 1.7 | 3.7 | 2400 | | Sandy-mudstone | 14 | 37 | 6 | 8.1 | 3.3 | 3 | 6.8 | 2400 | | Mudstone | 3 | 26 | 2 | 11.8 | 3.9 | 1.7 | 3.7 | 2400 | | Coal | 7 | 34 | 1 | 7 | 1.5 | 0.3 | 2.1 | 1410 | | Mudstone | 3 | 26 | 2 | 11.8 | 3.9 | 1.7 | 3.7 | 2400 | | Sandy-mudstone | 6 | 37 | 6 | 8.1 | 3.3 | 3 | 6.8 | 2400 | | Grained-sandstone | 5 | 43 | 7 | 18.6 | 7.6 | 4 | 15.4 | 2600 |
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