Research Article
Seepage Property of Crushed Mudstone Rock in Collapse Column
| Specimen group | Specimen no. | Particle size (mm) | Porosity | Hydraulic pressure (MPa) |
| 1 | 1a | 5.0∼7.5 | 0.19 | 0.7 | 1b | 7.5∼10.0 | 0.19 | 0.7 | 1c | 10.0∼12.5 | 0.19 | 0.7 | 1d | 12.5∼15.0 | 0.19 | 0.7 |
| 2 | 2a | 10.0∼12.5 | 0.15 | 0.7 | 2b | 10.0∼12.5 | 0.19 | 0.7 | 2c | 10.0∼12.5 | 0.23 | 0.7 | 2d | 10.0∼12.5 | 0.27 | 0.7 |
| 3 | 3a | 7.5∼10.0 | 0.19 | 0.3 | 3b | 7.5∼10.0 | 0.19 | 0.7 | 3c | 7.5∼10.0 | 0.19 | 1.1 | 3d | 7.5∼10.0 | 0.19 | 1.5 |
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