Trial number | Symbol of the trial | Aggregate particle size A (mm) | Distance between the boreholes B (m) | Initial water flow rate C (× 10−2 m/s) | Tunnel inclination D (°) | Plugging efficiency PE (%) |
---|---|---|---|---|---|---|
1 | A1B1C1D1 | 0.25–0.5 | 0.5 | 0 | 0 | 98.15 |
2 | A1B2C2D2 | 0.25–0.5 | 0.75 | 1.5 | 3 | 94.65 |
3 | A1B3C3D3 | 0.25–0.5 | 1.0 | 2.4 | 5 | 88.79 |
4 | A1B4C4D4 | 0.25–0.5 | 1.5 | 3.0 | 8 | 83.96 |
5 | A2B1C2D3 | 0.5–1.0 | 0.5 | 1.5 | 5 | 94.80 |
6 | A2B2C1D4 | 0.5–1.0 | 0.75 | 0 | 8 | 97.83 |
7 | A2B3C4D1 | 0.5–1.0 | 1.0 | 3.0 | 0 | 91.86 |
8 | A2B4C3D2 | 0.5–1.0 | 1.5 | 2.4 | 3 | 92.65 |
9 | A3B1C3D4 | 1.0–2.0 | 0.5 | 2.4 | 8 | 93.20 |
10 | A3B2C4D3 | 1.0–2.0 | 0.75 | 3.0 | 5 | 91.23 |
11 | A3B3C1D2 | 1.0–2.0 | 1.0 | 0 | 3 | 97.74 |
12 | A3B4C2D1 | 1.0–2.0 | 1.5 | 1.5 | 0 | 94.94 |
13 | A4B1C4D2 | 2.0–5.0 | 0.5 | 3.0 | 3 | 96.09 |
14 | A4B2C3D1 | 2.0–5.0 | 0.75 | 2.4 | 0 | 97.12 |
15 | A4B3C2D4 | 2.0–5.0 | 1.0 | 1.5 | 8 | 97.19 |
16 | A4B4C1D3 | 2.0–5.0 | 1.5 | 0 | 5 | 96.27 |