Experimental Study on the Effect of Gas Pressure on Ultrasonic Velocity and Anisotropy of Anthracite

Table 2

Gas adsorption capacity of coal samples under different gas pressure conditions.

(MPa)	(ml/g)
	#8-A	#8-B	#8-C	#8-D	#8-E
-0.1	0	0	0	0	0
0.2	7.46	7.41	7.46	7.59	7.37
0.4	12.22	12.15	12.21	12.40	12.09
0.6	15.52	15.44	15.51	15.71	15.37
0.8	17.94	17.86	17.93	18.14	17.79
1.0	19.79	19.71	19.78	19.99	19.64
1.2	21.26	21.18	21.24	21.45	21.11
1.4	22.44	22.36	22.43	22.62	22.30