Mechanical Properties and Acoustic Emission Characteristics of Thawing Frozen Sandstone

Table 2

Strength parameters of Cretaceous frozen sandstone during thawing.

T (°C)	σcc (MPa)	σci (MPa)	σf (MPa)	σs (MPa)	σcc/σs	σci/σs	σf/σs
20	1.59	3.96	6.70	8.81	0.18	0.45	0.76
0	1.89	4.83	7.99	10.51	0.18	0.46	0.76
−2	2.28	6.03	10.33	13.40	0.17	0.45	0.77
−4	3.41	9.22	15.64	20.05	0.17	0.46	0.78
−6	3.87	10.93	18.00	22.78	0.17	0.48	0.79
−10	4.06	12.44	20.31	25.39	0.16	0.49	0.80
−20	4.71	15.39	25.44	31.41	0.15	0.49	0.81