Research Article
Micropore Structure and Fractal Characteristics of Low-Permeability Coal Seams
Table 2
Fractal dimensions of pore distribution of raw coal samples.
| Coal sample | Magnification | Fractal dimension | | Mean fractal dimension |
| B-1 | 500 | 1.9031 | 0.94326 | 1.7468 | 1000 | 1.7569 | 0.97957 | 1000+ | 1.6339 | 0.93567 | 2000 | 1.7815 | 0.96458 | 2000+ | 1.6586 | 0.94362 |
| B-2 | 500 | 1.7058 | 0.95124 | 1.45716 | 1000 | 1.3135 | 0.96959 | 1000+ | 1.5879 | 0.97451 | 2000 | 1.1818 | 0.93462 | 2000+ | 1.4968 | 0.96786 |
| B-3 | 500 | 1.9612 | 0.97896 | 1.79388 | 1000 | 1.4917 | 0.96323 | 1000+ | 1.8141 | 0.93417 | 2000 | 1.8078 | 0.97489 | 2000+ | 1.8946 | 0.96587 |
| B-4 | 500 | 1.8544 | 0.99452 | 1.7989 | 1000 | 1.6664 | 0.9764 | 1000+ | 1.9731 | 0.96312 | 2000 | 1.6586 | 0.94754 | 2000+ | 1.842 | 0.96851 |
| B-5 | 500 | 1.9859 | 0.98394 | 1.8371 | 1000 | 1.7858 | 0.97153 | 1000+ | 1.8875 | 0.96728 | 2000 | 1.7415 | 0.97555 | 2000+ | 1.7848 | 0.96173 |
| B-6 | 500 | 1.8909 | 0.94283 | 1.69184 | 1000 | 1.6697 | 0.96428 | 1000+ | 1.8521 | 0.95784 | 2000 | 1.4124 | 0.92375 | 2000+ | 1.6341 | 0.97618 |
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