Table 14 Optimized profile and scores for each secondary indicator.
Indicators | Sub-indicators | Specific situation | Score |
|---|---|---|---|
Blasting over-/under-excavation | Degree of surrounding rock spalling | No spalling | 95 |
Maximum linear overbreak |  < 5 cm | 90 | |
Local under-excavation amount |  < 5 cm | 90 | |
Half-hole mark rate | 80% | 70 | |
Contour flatness | Flat | 100 | |
Blasting damage | Vault damage | No damage | 95 |
Arch shoulder damage | No damage | 95 | |
Arch waist damage | No damage | 95 | |
Arch bottom damage | Lower degree of damage | 85 |
