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The results for five of the chosen rock bolts in a highway tunnel in Wuqi County.
| Rock Bolt Number | Measured Length (m) | Actual Length (m) | Error (%) | Average Error (%) |
|---|---|---|---|---|
| 1 | 2.01 | 2.00 | 0.5 | 0.8 |
| 2 | 3.05 | 3.10 | 1.6 | |
| 3 | 3.16 | 3.15 | 0.3 | |
| 4 | 2.82 | 2.80 | 0.7 | |
| 5 | 2.92 | 2.95 | 1.0 |
