Mechanical Characteristics of Frozen Sandstone under Lateral Unloading: An Experimental Study

Table 1

Lateral unloading test plan.

Rock sample number	Temperature T (°C)	Initial confining pressure (MPa)	Initial axial pressure (MPa)	Unloading rate (MPa/min)	Test	Test content
LUT-1	20	20	26	0.2	Lateral unloading mechanics test	Confining pressure, axial stress, radial strain, axial strain
LUT-2	−5	20	42	0.2
LUT-5		10	40	0.2
LUT-7			50	0.04
LUT-3	−10	20	50	0.2
LUT-8			50	4.0
LUT-6		30	55	0.2
LUT-4	−15	20	50	0.2