Experimental Investigation of the Thermal Expansion Characteristics of Anthracite Coal Induced by Gas Adsorption

Table 7

The thermal expansion rate and permeability change of coal matrix adsorbing CO₂ and CH₄ under the pressure of 1~6 MPa.

(MPa)	(K^-1)	(K^-1)	(%)		(%)
			CO2	CH4	CO2	CH4
1			1.76	0.84	-6.91	-3.33
2			2.24	1.8	-8.76	-7.07
3			3.79	2.21	-14.59	-8.65
4			4.59	2.66	-17.52	-10.36
5			4.95	3.15	-18.82	-12.2
6			5.40	3.81	-20.43	-14.66