Research Article
A Roadheader-Assisted Coal Cutter Based on Tensile Failure Mechanism of Coal
Table 2
Physical mechanic parameters.
| | Lithology | Bulk (GPa) | Shear (GPa) | Friction (°) | Cohesion (MPa) | Tensile (MPa) | Density (kg/m3) |
| | Fine-sand stone | 11.2 | 5.9 | 27.56 | 2.21 | 9.19 | 2510 | | Silty-sand stone | 14.4 | 7.5 | 33 | 2.42 | 9.43 | 2431 | | Medium-sand stone | 15.5 | 7.9 | 26 | 2.32 | 9.21 | 2287 | | Mud stone | 8.2 | 4.3 | 23 | 4.3 | 8.65 | 2400 | | 3# coal | 5.1 | 2.6 | 24.8 | 1.3 | 3.1 | 1450 |
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