Research Article
Evaluation of Rock Burst Propensity and Rock Burst Mechanism in Deep Phosphate Mines: A Case Study of Sujiapo Phosphate Mine, Hubei Province, China
Table 1
Table of results of physical and mechanical determination of rocks.
| Location | Number | Density (g/cm3) | Surrounding pressure (MPa) | Compressive strength (MPa) | Shear strength (MPa) | Poisson’s ratio | Cohesive force (MPa) | The angle of internal friction (°) |
| Ore sample | K-1 | 3.00 | 0 | 19.596 | 6.6821 | 0.300 | 4.42 | 47 | K-3 | 3.07 | 8 | 37.016 | 9.8945 | 0.221 | K-5 | 3.00 | 10 | 75.098 | 22.1984 | 0.286 |
| Roof | D-2 | 2.83 | 0 | 148.858 | 22.6338 | 0.261 | 9.68 | 71 | D-5 | 2.84 | 8 | 164.436 | 26.8031 | 0.224 | D-3 | 2.82 | 10 | 188.630 | 29.4427 | 0.272 |
| Floor | d-1 | 2.75 | 0 | 84.835 | 16.3890 | 0.32 | 10.41 | 64 | d-2 | 2.77 | 5 | 97.933 | 21.4473 | 0.23 | d-5 | 2.77 | 10 | 130.504 | 27.4853 | 0.12 |
|
|