Table 3 Statistics of isothermal adsorption test results of coal seam.

From: The geological factors affecting gas content and permeability of coal seam and reservoir characteristics in Wenjiaba block, Guizhou province

Coal seam number

Moisture (Mad)/%

Ash (Ad)/%

VL.daf/m3/t

VL.ad/m3/t

PL/Mpa

Rmax/%

16

18.60

0.38

31.98

25.30

1.34

2.55

27

15.29

0.56

30.99

25.28

1.27

3.84

30

11.08

0.75

30.98

26.56

1.44

3.13

  1. Rmax is the maximum vitrinite reflectance; VL.ad is the volume of air drying base; VL.daf is the dry ash-free volume.
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