Research Article
An Evaluation Method of Rock Brittleness Based on the Prepeak Crack Initiation and Postpeak Stress Drop Characteristics
Table 6
Calculation results of each index of granite under different loading modes.
| Loading mode | BIBi·Bii | Comparison of brittleness indices | Qualitative analysis of the test curve | B1 | B2 | B3 | B4 | B5 |
| Unloading | 0.94 | 0.57 | 0.26 | 1.28 | 0.67 | 1.22 | Brittleness | Compression | 0.40 | 0.44 | 0.13 | 0.43 | 0.43 | 1.08 | Strain softening |
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