Coal Permeability Variation during the Heating Process considering Thermal Expansion and Desorption Shrinkage

Table 1

Test scheme.

Test	Pore pressure/MPa	Stress state/MPa	Temperature/°C
Permeability	0.8, 2, 3.2	,	30, 60, 90, 120, 150
	3.2	,
Thermal expansion	/	,	30, 60, 90, 120, 150
		,
Adsorption and desorption	3, 2.5, 2, 1.5, 1, 0.5	,	30