Study on the Microscale Tensile Properties of Lower Cambrian Niutitang Formation Shale Based on Digital Images

Table 3

Statistics of fracture rate and cumulative acoustic emission at different angles.

(°)	Crack rate/%
0°	2.58
15°	2.77
30°	2.36
45°	2.09
60°	1.79
75°	1.74
90°	1.42