Research Article
Experimental Study of Influence of Support Failures on Rockbursts under True-Triaxial Condition
Table 6
Testing results of one-single face true-triaxial unloading test with different support failure rates.
| | Specimen number | Unloading rate of σ3 (MPa/s) | Dimension of rockburst notch (cm × cm × cm) | Quality of the ejected fragments (g) | Average rate of ejected fragments (m/s) | Kinetic energy of ejected fragments (J) | Average size of ejected fragments (mm) |
| | GZ-6 | 0.1 | — | — | — | 0 | — | | GZ-7 | 0.5 | 7.5 × 10.0 × 1.5 | 78.19 | 3.50 | 0.48 | 43.17 | | GZ-8 | 1.0 | 13.3 × 10.0 × 1.3 | 368.39 | 3.79 | 2.64 | 45.36 | | GZ-9 | 2.0 | 15.0 × 10.0 × 2.0 | 394.75 | 5.19 | 5.31 | 64.46 |
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