Research Article
Analysis on Spatial Disturbance Influence of Surrounding Rock Stress in the Staggered Roadways and Its Control Countermeasures
Table 1
Mechanical parameters of coal and rock.
| | Rock name | Density (kg/m3) | Bulk modulus (GPa) | Shear modulus (GPa) | Friction angle (°) | Cohesion (MPa) | Tensile strength (MPa) |
| | Fine sandstone | 2600 | 1.42 | 0.87 | 29.00 | 1.10 | 1.66 | | Siltstone | 2400 | 0.55 | 0.34 | 25.00 | 1.04 | 1.15 | | Coal seam | 1400 | 0.37 | 0.29 | 23.00 | 0.80 | 0.80 | | Fine siltstone | 2450 | 0.58 | 0.36 | 25.00 | 1.04 | 1.06 |
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