Research Article
Estimation of Rock Burst Grades Using Rock Mass Strength
Table 4
Rock burst grades at various measurement locations using the ratio of σc to σmax.
| | No. of measurement points | | Estimated results using CHEGI criterion | Actual field grades of rock burst |
| | 1 | 0.82 | Violent | Strong | | 2 | 1.51 | Strong | Medium | | 3 | 3.80 | Medium | Slight | | 4 | 0.87 | Violent | Strong | | 5 | 1.11 | Strong | Medium | | 6 | 0.48 | Violent | Strong | | 7 | 0.83 | Violent | Strong | | 8 | 1.52 | Strong | Medium | | 9 | 3.26 | Slight | Medium | | 10 | 1.88 | Strong | Medium | | 11 | 2.22 | Medium | Medium | | 12 | 1.17 | Strong | Strong | | 13 | 2.53 | Medium | Medium | | 14 | 2.74 | Medium | Medium | | 15 | 2.99 | Medium | Medium | | 16 | 1.43 | Strong | Medium | | 17 | 3.00 | Medium | Medium | | 18 | 1.35 | Strong | Medium |
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