Investigation on the Effect of Dynamic Frequency on Fracture Evolution in Preflawed Rock under Multistage Cyclic Loads: Insight from Acoustic Emission Monitoring

Figure 9

The main frequency characteristics of granite samples during the whole deformation process, during sample failure for granite with inclined flaw of 20°, 50°, and 70°, respectively. (a–d) The dynamic loading frequency is 0.04, 0.1, 0.5, and 1.0, respectively.

(a)

(b)

(c)

(d)