Dynamic Response of Seismic Dangerous Rock Based on PFC and Dynamics

Figure 15

HHT time-frequency diagram. (a) Model 1 rock block 1-2, (b) Model 1 rock block 4-2, (c) Model 2 rock block 1-2, (d) Model 2 rock block 4-2, (e) Model 3 rock block 1-2, (f) Model 3 rock block 4-2, (g) Model 4 rock block 1-2, and (h) Model 4 rock block 4-2.

(a)

(b)

(c)

(d)

(e)

(f)

(g)

(h)