Table 1 Summary of rock property tests in burning area.
From: Study on blasting fragmentation mechanism of burnt rock in open-pit coal mine
Rock type | Compressive strength (MPa) | Tensile strengt (MPa) | Cohesion (MPa) | Angle of internal friction (°) | Elastic modulus (GPa) | Poisson ratio | Density (kg·m−3) | Porosity (%) |
|---|---|---|---|---|---|---|---|---|
Burnt lava | 48.78 | 7.28 | 56.83 | 15.11 | 5.96 | 0.25 | 2160 | 6.9 |
Sintered rock | 58.69 | 5.69 | 57.48 | 18.26 | 5.10 | 0.30 | 2030 | 6.4 |
baked rock | 46.31 | 6.72 | 31.89 | 16.72 | 10.27 | 0.18 | 2290 | 6.2 |
