Experimental Study on Dynamic Mechanical Characteristics and Energy Evolution of Sandstone under Cyclic Impact Loading

Table 3

Failure modes of sandstone samples.

Impact velocity (m/s)	Failure modes
6	n = 4	n = 5	n = 6	n = 7	n = 8
7	n = 3	n = 4	n = 5
8	n = 1	0; n = 2