Research Article
Numerical Simulation and Optimization of Hole Spacing for Cement Grouting in Rocks
Table 1
Acoustic wave velocity and the permeability rate of drilling holes before grouting.
| Grout stage | Stage 1 | Stage 2 | Stage 3 | Stage 4 | Stage 5 | Stage 6 | Stage 7 | Stage 8 | Stage 9 | Stage 10 |
| Drilling hole/m | 5.5–10.5 | −15.5 | −20.5 | −25.5 | −30.5 | −35.5 | −40.5 | −45.5 | −50.5 | −55.6 | Wave velocity/m/s | 5140 | 5119 | 4629 | 4565 | 5077 | 4994 | 5061 | 5053 | 4816 | 4756 | Permeability rate/Lu | 9.94 | 11.61 | 10.66 | 8.33 | 11.15 | 8.36 | 7.17 | 9.82 | 9.2 | 5.56 |
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