Influence of Extreme Temperature on the Pore and Fracture Development of High-Rank Coal

Table 3

Porosity and permeability of coal samples under high temperature.

Number	Project
	Temperature (°C)	Porosity	Increase rate (%)	Permeability (10^−4·mD)	Increase rate (%)
JLS-2	30	3.178	−11.2	0.072	−31.9
JLS-2	100	2.821		0.049
ZG1-2	30	6.679	−10.5	2.824	−42.2
ZG1-2	100	5.981		1.632
ZG2-2	30	7.387	−13.6	41.71	−28.1
ZG2-2	100	6.382		29.991
WTP-2	30	10.743	−7.9	743.256	−30.3
WTP-2	100	9.89		518.364