Fracture Morphology Analysis of Frozen Red Sandstone under Impact

Table 1

Experimental scheme.

Rock type	Size (mm)	T (°C)	P (MPa)	NT
Red sandstone	Ф74 × 37	25	0.72	4
		−5		4
		−10		4
		−15		4
		−20		4
		−30		4
		−40		4