Excavation disturbance depth
| Ultimate unloading ratio Ru | Critical unloading ratio Rcr | Strong disturbance depth Hu | Transitional disturbance depth Hcr | |
|---|---|---|---|---|
| Pan et al. (2001) | 0.64 | 0.429 | 0.56H | 1.33H |
| Qin et al. (2008) | 0.8 | — | 0.25H | — |
| Li et al. (2021) | 0.8 | — | 0.25H | — |
| Deng and Jia (2008) | 0.81 | — | 0.23H | — |
| Ultimate unloading ratio | Critical unloading ratio | Strong disturbance depth | Transitional disturbance depth | |
|---|---|---|---|---|
| 0.64 | 0.429 | 0.56H | 1.33H | |
| 0.8 | — | 0.25H | — | |
| 0.8 | — | 0.25H | — | |
| 0.81 | — | 0.23H | — |
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