Research Article
Experimental and Numerical Simulation of Coal Rock Impact Energy Index Based on Peridynamics
Table 4
Compressive peak stresses and strains for different types of specimens.
| Specimen type and number | Coarse sandstone, CS | Fine sandstone, XS | Mudstone, NY | Top coal seam, 1M | Bottom coal seam, 4M |
| Peak compressive stress (MPa) | 121.15 | 147.52 | 92.15 | 32.26 | 42.56 | Peak compressive strain(10ā2) | 1.72 | 2.59 | 2.29 | 2.50 | 1.91 |
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