Table 2 Mass distribution of different pore sieving fragments.
Specimen type | No | \(\dot{\varepsilon }/s^{ - 1}\) | Percentage of fractions screened with different apertures/% | |||||
|---|---|---|---|---|---|---|---|---|
< 0.5 | 0.5–1 | 1–10 | 10–20 | 20–30 | > 30 | |||
Burst-prone coal sample | X-1 | 87.76 | 0.2 | 0.4 | 0.3 | 0.2 | 2.4 | 96.5 |
X-2 | 94.32 | 1.1 | 0.2 | 5.8 | 2.3 | 1.4 | 89.2 | |
X-3 | 115.17 | 13.8 | 3.6 | 34.5 | 17.8 | 16.9 | 13.4 | |
X-4 | 125.26 | 16.6 | 4.8 | 38.4 | 20.1 | 12.6 | 7.5 | |
X-5 | 146.67 | 20.8 | 5.2 | 46.4 | 16.8 | 10.8 | 0 | |
X-6 | 168.83 | 27.0 | 7.2 | 53.1 | 8.6 | 4.1 | 0 | |
Non-burst-prone coal sample | Y-1 | 67.43 | 0.1 | 1.2 | 41.8 | 48.9 | 4.3 | 3.7 |
Y-2 | 80.37 | 0.3 | 4.7 | 48.2 | 41.6 | 3.1 | 2.1 | |
Y-3 | 124.45 | 0.4 | 3.9 | 55.8 | 36.4 | 2.2 | 1.1 | |
Y-4 | 139.39 | 3.6 | 3.9 | 60.9 | 31.5 | 0.1 | 0 | |
Y-5 | 160.27 | 4.5 | 5.2 | 67.7 | 22.6 | 0 | 0 | |
Y-6 | 220.28 | 4.1 | 6.4 | 72.8 | 16.7 | 0 | 0 | |
