Table 1 Physical and mechanical parameters of coal–rock combined.
From: Failure energy evolution of coal–rock combination with different inclinations
Specimen number | Combined tilt angle (°) | σ3 (MPa) | Eave (GPa) | σ1 (MPa) | εp | Failure mode and breaking angle (°) |
|---|---|---|---|---|---|---|
0-1 | 0 | 1 | 0.345 | 7.551 | 0.028 | Inclined shear damage, 61.579 |
0-2 | 2 | 0.329 | 12.966 | 0.041 | Inclined shear damage, 61.558 | |
0-3 | 3 | 0.440 | 14.380 | 0.054 | Inclined shear damage, 61.614 | |
5-1 | 5 | 1 | 0.365 | 7.181 | 0.026 | Inclined shear damage, 59.214 |
5-2 | 2 | 0.391 | 11.787 | 0.037 | Inclined shear damage, 59.413 | |
5-3 | 3 | 0.444 | 14.345 | 0.052 | Inclined shear damage, 59.259 | |
10-1 | 10 | 1 | 0.364 | 7.076 | 0.025 | Inclined shear damage, 58.114 |
10-2 | 2 | 0.390 | 10.870 | 0.036 | Inclined shear damage, 58.471 | |
10-3 | 3 | 0.405 | 13.693 | 0.048 | Inclined shear damage, 58.104 | |
20-1 | 20 | 1 | 0.377 | 6.535 | 0.024 | Tensile and diagonal shear damage, 57.631 |
20-2 | 2 | 0.385 | 10.447 | 0.035 | Tensile and diagonal shear damage, 57.236 | |
20-3 | 3 | 0.425 | 12.236 | 0.043 | Tensile and diagonal shear damage, 57.518 | |
30-1 | 30 | 1 | 0.331 | 5.379 | 0.019 | Tensile and diagonal shear damage, 56.820 |
30-2 | 2 | 0.347 | 9.215 | 0.029 | Tensile and diagonal shear damage, 56.744 | |
30-3 | 3 | 0.476 | 10.057 | 0.033 | Tensile and diagonal shear damage, 56.438 | |
Rock-1 | Homogeneous rock mass | 1 | 0.322 | 8.084 | 0.029 | Shear damage, 64.662 |
Rock-2 | 2 | 0.354 | 13.097 | 0.045 | Shear damage, 64.346 | |
Rock-3 | 3 | 0.416 | 17.085 | 0.055 | Shear damage, 64.501 | |
Coal body 1 | Homogeneous coal body | 1 | 0.336 | 4.764 | 0.016 | Tensile and shear damage, 47.576 |
Coal body 2 | 2 | 0.353 | 7.097 | 0.022 | Tensile and shear damage, 47.372 | |
Coal body 3 | 3 | 0.478 | 8.392 | 0.028 | Tensile and shear damage, 47.519 |
