Table 1. Basic Parameters of the Coal Sample1.
| metamorphic degree | Mad (%) | Aad (%) | Vdaf (%) | ρtr (t/m3) | ρap (t/m3) | Ro,max (%) |
|---|---|---|---|---|---|---|
| Anthracite | 2.18 | 17.97 | 6.56 | 1.64 | 1.49 | 3.16 |
1
Mad (%) is the mass fraction of the coal sample moisture; Aad (%) is the mass fraction of air-dried ash; Vdaf (%) is the mass fraction of the volatile matter on a dry ash-free basis; ρtr (t/m3) is the true density of the coal sample; ρap (t/m3) is the apparent density of the coal sample; and R0, max (%) is the maximum reflectance of vitrinite oil immersion.