Research Article
Numerical Simulation and Optimization of Hole Spacing for Cement Grouting in Rocks
Table 2
Simulation results in each grouting stage.
| Grouting stage | Stage 1 | Stage 2 | Stage 3 | Stage 4 | Stage 5 | Stage 6 | Stage 7 | Stage 8 | Stage 9 | Stage 10 |
| Pressure/Pa | Simulation | 2.46 | 2.83 | 3.08 | 3.38 | 3.99 | 4.67 | 5.02 | 5.13 | 5.07 | 4.23 | Measurement | 2.51 | 2.88 | 3.13 | 3.43 | 4.04 | 4.72 | 5.07 | 5.18 | 5.07 | 5.08 | Difference % | −2.0 | −1.7 | −1.6 | −1.5 | −1.2 | −1.1 | −1.0 | −1.0 | 0.0 | −16.7 |
| Grout amount/L | Simulation | 1839 | 2466 | 3193 | 3110 | 1748 | 1513 | 1554 | 2110 | 1755 | 735 | Measurement | 2674 | 2982 | 2493 | 2509 | 2674 | 2515 | 2451 | 1121 | 2732 | 2513 | Difference % | −31.2 | −17.3 | 28.0 | 24.0 | −34.6 | −39.8 | −36.6 | 88.2 | −35.8 | −70.8 |
| Injection cement content/kg | Simulation | 2082 | 2831 | 3766 | 3643 | 2003 | 1696 | 1734 | 2438 | 2005 | 627 | Measurement | 2267 | 2592 | 2015 | 2069 | 2263 | 2042 | 1950 | 393 | 2320 | 1787 | Difference % | −8.1 | 9.2 | 86.9 | 76.1 | −11.5 | −16.9 | −11.1 | 519.7 | −13.6 | −64.9 |
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