Research Article
Experimental Study on Lateral Permeability Evolution of Sandstone under Seepage-Damage Coupling
Table 1
MD-1 sandstone loading path and permeability statistics.
| Axial compression/MPa | 10.0 | 10.5 | 11 | 11.5 | 12.0 | 12.5 | 13.0 | 13.5 | 14 |
| Confining pressure, MPa | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | Permeability, ×10−9 mm2 | 1.54 | 0.672 | 0.879 | 0.825 | 0.915 | 0.641 | 0.795 | 0.882 | 0.672 | Axial compression, MPa | 14.5 | 15.0 | 15.5 | 16.0 | 16.5 | 17 | 17.5 | 18.0 | 18.5 | Confining pressure, MPa | 8 | 7 | 6 | 5 | 5 | 5 | 5 | 5 | 5 | Permeability, ×10−9 mm2 | 0.76 | 0.889 | 0.969 | 0.107 | 0.106 | 0.128 | 0.893 | 0.811 | 0.923 | Axial compression, MPa | 19.0 | 19.5 | 20 | 20.5 | 21.0 | 21.5 | 22.0 | | | Confining pressure, MPa | 5 | 4 | 4 | 4 | 4 | 4 | 4 | | | Permeability, ×10−9 mm2 | 0.084 | 1.12 | 0.977 | 0.943 | 1.12 | 1 | 200 | | |
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