Table 3. Parameters of Mercury Injection, Porosity, and Permeability of Huaibei Coalsa.
| pore
distribution(%) |
|||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| sampling site | displacement pressure (MPa) | saturated median pressure (MPa) | median pore radius (μm) | maximum mercury saturation (%) | mean pore radius (μm) | mercury drainage efficiency (%) | macropore | mesopore | transitional pore | porosity (%) | permeability (mD) |
| Yuanzhuang mine | 2.07 | 45.79 | 0.016 | 71.919 | 0.066 | 58.18 | 2.91 | 25.63 | 71.47 | 2.664 | 0.034 |
| Hengyuan mine | 0.14 | 47.938 | 0.015 | 67.32 | 0.839 | 69.07 | 33.32 | 13.80 | 52.87 | 1.532 | 0.002 |
| Wugou mine | 5 | - | - | 29.874 | 0.016 | 83.18 | 2.88 | 43.46 | 53.66 | 4.842 | 0.386 |
a
Note: ‘ - ’ indicates that the maximum mercury saturation does not reach 50%, and the corresponding parameters are not measured.