Impact Dynamic Properties and Energy Evolution of Damaged Sandstone Based on Cyclic Loading Threshold

Table 4

Energy ratio of sandstones with different degrees of damage under impact load.

Cyclic load threshold	Ratio of (%)	Ratio of (%)	Ratio of (%)
0	11.78	37.55	50.67
0.2	9.41	42.25	48.34
0.4	7.55	47.66	44.79
0.6	4.60	62.73	32.66
0.8	2.60	67.38	30.02