Research Article
Research and Analysis on the Influence of Small Clear Distance Drilling and Blasting Method on the Existing Tunnel Structure
Table 3
Maximum closing speed of each monitoring point.
| Excavation depth (m) | Resultant velocity (cm/s) | 191 | 1108 | 9851 | 970 | 487 |
| 54 | 2.27 | 3.87 | 1.68 | 0.49 | 0.35 | 60 | 2.54 | 3.91 | 3.61 | 0.83 | 0.35 | 78 | 1.39 | 2.94 | 11.28 | 3.11 | 1.15 | 84 | 0.82 | 1.78 | 10.72 | 3.49 | 1.67 | 90 | 0.68 | 1.29 | 5.89 | 3.31 | 1.97 | Maximum | 2.54 | 3.91 | 11.28 | 3.49 | 1.97 |
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