|
| Tunneling distance (m) | Number of cutter changes | Reasons to change cutters | |
| Ring wear | Ring fracture | |||
| 9# tunnel of Tao River Project (cutter No. M01-M36) | 5938 | 247 | 149 (60.3%) | - |
| Outlet segment of Qinling Tunnel | 5244 | 2381 | 1362 (57.2%) | 67 (2.8%) |
| Entrance segment of Qinling Tunnel | 5621 | 2267 | 1807 (79.7%) | 36 (1.6%) |
| 1# Tunnel of Taohuapu Project | 6016 | 1259 | 1017 (80.8%) | - |