Mode I Fracture Toughness Test and Fractal Character of Fracture Trajectory of Red Sandstone under Real-Time High Temperature

Table 6

Pore structure parameters of sandstone at various temperatures.

Temperature (°C)	Average pore size (nm)	Porosity (%)
20	38	3.7
100	26	3.5
200	48	4.2
300	81	5.3
400	176	8.6
500	284	13.5
600	372	18.2
700	449	24.8