Study on the Effect of Precrack on Specimen Failure Characteristics under Static and Dynamic Loads by Brazilian Split Test

Table 1

Testing design for precrack rock specimens.

Precrack angle (°)	Gas pressure (MPa)	Number of specimens	Precrack angle (°)	Gas pressure (MPa)	Number of specimens
0	0.35	3	45	0.45	3
0	0.4	3	60	0.35	3
0	0.45	3	60	0.4	3
30	0.35	3	60	0.45	3
30	0.4	3	90	0.35	3
30	0.45	3	90	0.4	3
45	0.35	3	90	0.45	3
45	0.4	3