Table 1.
Results of measurements of physical and mechanical parameters of hard coal samples from Experimental Mine “Barbara” (seam 310, 6 samples).
| Lp | Location of sample | Macroscopic description | Sample number | Rc (MPa) | Rr (MPa) | Rcr (MPa) | E (MPa) | M (MPa) | εkr (‰) | εr (‰) | ρb (kg/m3) | c (MPa) | φ (1°) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 |
Experimental Mine “Barbara” Seam 310 Sample 1–6 |
Hard coal | 1/1 | 26.1 | 0.43 | 0.53 | 1449 | 5740 | 25.77 | 33.54 | 1212 | 1.78 | 29 |
| Semi-gloss | 1/2 | 24.2 | 0.33 | 0.14 | 1606 | 4832 | 25.16 | 30.75 | 1167 | ||||
| Matt layered | 1/3 | 17.1 | 0.29 | 1.99 | 1099 | 1445 | 25.23 | 37.24 | 1200 | ||||
| Carbonate inclusions | 1/4 | 18.9 | 0.40 | 1.85 | 1153 | 3239 | 25.98 | 36.85 | 1165 | ||||
| Hard coal | 1/5 | 13.9 | 0.38 | 1.13 | 962 | 1242 | 28.44 | 38.57 | 1109 | ||||
| Semi-gloss | 1/6 | 21.1 | 0.41 | 1.36 | 1254 | 1866 | 29.02 | 43.83 | 1233 | ||||
| Mean | 20.2 | 0.37 | 1.17 | 1254 | 3061 | 20.60 | 36.80 | 1181 | – | – | |||
| Std. dev. | 4.5 | 0.05 | 0.73 | 237 | 1881 | 1.69 | 4.47 | 44 | – | – |