Research Article
Research on Full-Section Anchor Cable and C-Shaped Tube Support System of Deep Layer Roadway
Table 2
The surrounding rock parameters of each layer.
| | Stratum | Density (kg/m3) | Bulk modulus (GPa) | Shear modulus (GPa) | Cohesion (MPa) | Friction angle (°) | Tensile strength (MPa) |
| | Coal | 1700 | 3.1 | 1.8 | 0.7 | 25 | 0.8 | | Mudstone | 2520 | 4.1 | 2.3 | 1.2 | 30 | 1.3 | | Sandy mudstone | 2500 | 5.5 | 3 | 2 | 33 | 0.8 | | Medium sandstone | 2650 | 6 | 3.6 | 3 | 35 | 2.1 |
|
|
