Study on Prediction Model of Mechanical Parameters of Rock Frozen-Thawed Damage based on NMR Technology

Table 1

Physical and mechanical parameters of surface rock samples.

Serial number	Frozen-thawed times/times	Mechanical experiment	Peak stress (MPa)	Peak strain (%)	Elastic modulus (GPa)
1	60	Uniaxial compression	61.2	0.95	12.4
2	60	Uniaxial compression	59.3	0.97	13.1
3	60	Uniaxial compression	56.4	0.94	12.3
4	60	Shock loading	84.2	0.69	9.25
5	60	Shock loading	84.9	0.69	9.56
6	60	Shock loading	80.7	0.68	9.05
7	60	Shock loading	85.4	0.68	9.18
8	60	Shock loading	83.1	0.69	9.24
9	100	Uniaxial compression	55.4	1.01	11.6
10	100	Uniaxial compression	54.9	0.97	11.2
11	100	Shock loading	79.2	0.71	8.34
12	100	Shock loading	74.3	0.7	8.31
13	100	Shock loading	80.4	0.7	8.23
14	100	Shock loading	82.4	0.69	8.84
15	100	Shock loading	75.4	0.78	8.21