Study on Dynamic Behavior and Energy Dissipation of Rock considering Initial Damage Effect

Table 2

Damage degree of yellow sandstone under different freeze-thaw cycles.

No.	Freeze-thaw cycles n	(km/s)	(km/s)		Average
X0-1	0	2.688	2.688	0	0
X0-2		2.688	2.688	0
X0-3		2.688	2.688	0
X5-1	5	2.688	1.974	0.461	0.465
X5-2		2.688	1.956	0.470
X5-3		2.688	1.968	0.463
X10-1	10	2.688	1.613	0.640	0.643
X10-2		2.688	1.588	0.650
X10-3		2.688	1.632	0.631
X20-1	20	2.688	1.341	0.736	0.742
X20-2		2.688	1.352	0.747
X20-3		2.688	1.347	0.741
X30-1	30	2.688	1.111	0.829	0.823
X30-2		2.688	1.134	0.822
X30-3		2.688	1.143	0.819