| Monitoring time/(d) | Air intake volume of roadway/(m3/min) | Return air volume of roadway/(m3/min) | Air leakage in roadway/(m3/min) |
| 0 | 505 | 425 | 80 |
| 10 | 500 | 438 | 62 |
| 20 | 505 | 460 | 45 |
| 30 | 495 | 459 | 36 |
| 40 | 496 | 465 | 31 |
| 50 | 502 | 474 | 28 |
| 60 | 502 | 477 | 25 |
| 70 | 500 | 477 | 23 |
| 80 | 503 | 480 | 23 |
| 90 | 503 | 479 | 24 |