Research Article
Effects of Igneous Intrusion on Microporosity and Gas Adsorption Capacity of Coals in the Haizi Mine, China
Table 1
Geochemical and petrographic analyses of Haizi coal samples.
| | Sample | CN | (m) | Proximate analysis (wt.%) | Macerals (vol.%) | (%) | (°C) | | Mois | Ash | VM | V | I | M |
| | Number 1 | 7 | 60 | 1.6 | 45.6 | 10.0 | 83.4 | 14.2 | 2.4 | 2.78 | 283 | | Number 2 | 7 | 70 | 1.6 | 36.4 | 10.2 | 85.3 | 12.7 | 2.0 | 2.75 | 282 | | Number 3 | 7 | 80 | 1.7 | 38.8 | 10.5 | 85.7 | 12.0 | 2.3 | 2.71 | 280 | | Number 4 | 8 | 90 | 2.6 | 20.5 | 11.2 | 87.3 | 11.3 | 1.4 | 2.69 | 279 | | Number 5 | 8 | 100 | 2.4 | 20.0 | 11.6 | 87.6 | 10.5 | 1.9 | 2.60 | 275 | | Number 6 | 8 | 110 | 2.3 | 22.5 | 11.2 | 87.2 | 10.8 | 2.0 | 2.65 | 277 | | Number 7 | 9 | 120 | 2.5 | 18.7 | 11.8 | 86.4 | 11.2 | 2.4 | 2.59 | 274 | | Number 8 | 9 | 130 | 2.5 | 21.5 | 12.9 | 87.2 | 10.6 | 2.2 | 2.62 | 275 | | Number 9 | 9 | 140 | 2.6 | 20.1 | 12.2 | 85.6 | 12.0 | 2.4 | 2.53 | 271 | | Number 10 | 10 | 160 | 3.0 | 11.4 | 15.6 | 86.4 | 9.8 | 3.8 | 2.30 | 259 | | Number 11 | 10 | 180 | 2.7 | 10.6 | 16.4 | 87.9 | 8.8 | 3.3 | 2.32 | 260 | | Number 12 | 10 | 200 | 2.5 | 9.2 | 17.6 | 88.2 | 8.3 | 3.5 | 2.41 | 265 |
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Note: CN: coal seam number; : distance from sill boundary; Mois: moisture; Ash is on a dry basis; VM: volatile matter, on dry ash free (daf) basis; V: vitrinite; I: inertinite; M: mineral.
: random vitrinite reflectance; : estimated paleotemperature.
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