Research Article
The Movement Characteristics of Coal Granular Body in Excavating Rescue Channel in the Collapsed Body
Table 2
Mechanical property of model.
| Number | Material properties | Particle quantity | Particle size (mm) | Density (kg·m−3) | Tensile strength (MPa) | Local damping coefficient | Excavation position | Natural repose angle |
| 1 | Coal | 1458 | 100 | 1650 | 0.51 | 0.3 | Shear stress part | 16° | 2 | 1458 | 100 | Shear stress part | 26° | 3 | 1458 | 100 | Shear stress part | 36° | 4 | 1458 | 100 | Shear stress part | 46° | 5 | 1458 | 100 | Middle lower part | 46° | 6 | 353 | 200 | Shear stress part | 16° | 7 | 353 | 200 | Shear stress part | 26° | 8 | 353 | 200 | Shear stress part | 36° | 9 | 353 | 200 | Shear stress part | 46° | 10 | 353 | 200 | Middle lower part | 46° | 11 | 742 | 100–200 | Shear stress part | 16° | 12 | 742 | 100–200 | Shear stress part | 26° | 13 | 742 | 100–200 | Shear stress part | 36° | 14 | 742 | 100–200 | Shear stress part | 46° | 15 | 742 | 100–200 | Middle lower part | 46° |
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