Research Article
Research on Structural Characteristics of Dynamic Nuclear Zone in Dynamic System of Coal and Rock
Table 2
Physical and mechanical indexes of coal seam on panel 8939.
| Lithology | Uniaxial tensile strength (MPa) | Uniaxial compressive strength (MPa) | Hardness | Modulus of elasticity (GPa) | Poisson ratio | Internal friction angle (°) | Cohesive force (MPa) |
| Coal | 1.34 | 32.27 | 3.23 | 3.66 | 0.20 | 29.89 | 3.67 |
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