| 参考线 |
| ||
| 上台阶右导坑 | 下台阶左导坑 | 下台阶右导坑 | |
| L1 | 0 | 1 | 0 |
| L2 | 0 | 2.5 | 5.5 |
| L3 | 8.1 | 10.2 | 12.3 |
| L4 | 11.5 | 8.2 | 10 |
| L5 | 1.9 | 4.9 | 4.7 |
| L6 | 8.6 | 13.9 | 12.3 |
| L7 | 14.5 | 14.5 | 14.5 |
| L8 | 2.7 | 2.8 | 2.8 |
| L9 | 14.5 | 15.8 | 14.5 |
| L10 | 8.6 | 8 | 12.3 |
| L11 | 1.9 | 2.2 | 4.7 |
| L12 | 11.5 | 14.5 | 10 |
| L13 | 8.1 | 11 | 12.3 |
| L14 | 0 | 4 | 5.5 |
临界破坏点与开挖轮廓距离(m)