Table 3 Dynamic mechanical parameters of coal, rock, and combined bodies.
From: Dynamic response and failure characteristics of combined rocks under confining pressure
Body type | Number | Strain rate (s−1) | Compressive strength (MPa) | Ultimate strain (%) | Peak strain (%) | Elastic modulus (GPa) |
|---|---|---|---|---|---|---|
Sandstone | 1 | 23.43 | 32.90 | 0.377 | 0.231 | 15.62 |
2 | 27.27 | 37.93 | 0.451 | 0.333 | 11.80 | |
3 | 23.41 | 32.52 | 0.423 | 0.319 | 9.70 | |
Bituminous coal | 1 | 40.60 | 14.70 | 0.669 | 0.504 | 5.31 |
2 | 37.34 | 16.03 | 0.612 | 0.463 | 5.97 | |
3 | 44.37 | 13.51 | 0.706 | 0.519 | 4.87 | |
Combined body | 1 | 36.63 | 20.90 | 0.566 | 0.400 | 7.53 |
2 | 48.86 | 23.11 | 0.653 | 0.478 | 6.59 | |
3 | 37.03 | 21.44 | 0.582 | 0.441 | 8.37 |
