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The results for five of the chosen rock bolts at Yangqu Hydropower Station.
| Rock Bolt Number | Measured Length (m) | Actual Length (m) | Error (%) | Average Error (%) |
|---|---|---|---|---|
| 1 | 2.02 | 2.00 | 1.0 | 1.0 |
| 2 | 1.81 | 1.80 | 0.6 | |
| 3 | 2.77 | 2.80 | 1.0 | |
| 4 | 3.76 | 3.80 | 0.7 | |
| 5 | 3.15 | 3.10 | 1.6 |
