Research Article
Estimation of Rock Burst Grades Using Rock Mass Strength
Table 9
Calculation of rock burst grades at 4 verification points using the ratio of σc to σmax.
| No. of verification points | σc (MPa) | σmax (MPa) | σc (MPa) | Estimated results of CHEGI criterion |
| 1 | 63.97 | 78.7 | 0.813 | Violent | 2 | 50.37 | 25.4 | 1.983 | Strong | 3 | 55.39 | 36.9 | 1.501 | Strong | 4 | 42.54 | 46.3 | 0.919 | Violent |
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