Table 3.
Results of reflectance tests and microhardness properties for coal samples from the Zofiówka mine.
| Coal Sample | Hv [N/mm2] | Eit [GPa] | Hv Max [N/mm2] | Eit Max [GPa] | Hv Min [N/mm2] | Eit Min [GPa] |
|---|---|---|---|---|---|---|
| 404/4 F | 54.32 | 5.70 | 61.00 | 6.17 | 42.83 | 4.94 |
| 405/2 F | 50.04 | 5.65 | 64.49 | 6.44 | 40.40 | 5.01 |
| 405/1 B | 56.51 | 5.79 | 64.77 | 6.38 | 46.72 | 5.27 |
| 406/1 F | 55.71 | 6.00 | 66.40 | 6.63 | 44.03 | 5.02 |
| 404/2 F | 60.37 | 5.30 | 74.96 | 6.23 | 35.12 | 3.99 |
| 406/1 B | 57.18 | 6.07 | 67.95 | 6.84 | 41.76 | 4.89 |
| 418 E | 64.44 | 6.46 | 76.59 | 7.19 | 47.80 | 5.62 |
| 409/4 D | 51.89 | 5.58 | 62.34 | 6.21 | 43.57 | 5.02 |
| 410 G | 53.86 | 5.95 | 62.52 | 6.66 | 43.47 | 5.25 |
| 412 E | 52.59 | 5.65 | 64.19 | 6.36 | 43.37 | 5.05 |
| 410 D | 56.07 | 5.94 | 69.86 | 6.77 | 46.62 | 5.22 |
| 409/3 H | 56.96 | 6.19 | 71.63 | 7.04 | 42.56 | 5.30 |
| 410 E | 62.2 | 6.05 | 76.25 | 6.66 | 58.29 | 5.74 |
| 407/1 F | 61.75 | 6.15 | 69.79 | 6.91 | 51.30 | 5.17 |
| 412 D | 56.3 | 5.98 | 75.52 | 6.87 | 44.24 | 4.94 |
| 416/3 E | 57.67 | 5.99 | 65.63 | 6.68 | 44.42 | 5.31 |
| 413/2 E | 58.71 | 6.04 | 73.44 | 6.84 | 41.94 | 5.04 |
| 417/1 C | 65.75 | 6.46 | 73.00 | 7.07 | 46.72 | 5.21 |
| 502/1 C | 60.39 | 5.98 | 73.85 | 6.47 | 45.04 | 5.25 |
| 412 G | 55.75 | 5.88 | 68.56 | 6.19 | 41.82 | 5.07 |
| 413/2 H | 58.21 | 6.63 | 65.86 | 7.14 | 44.29 | 5.75 |
| 413/2 G | 47.43 | 5.63 | 67.20 | 6.83 | 39.97 | 4.98 |
| 502/1 E | 56.51 | 5.79 | 64.77 | 6.38 | 46.72 | 5.27 |
Ro—average vitrinite reflectance; Hv—average Vickers microhardness; Eit—average modulus of elasticity. Hv max—maximum Vickers microhardness; Eit max—maximum modulus of elasticity; Hv min—minimum Vickers microhardness; Eit min—minimum modulus of elasticity.