Influence of Bidirectional Impact Loading on Anomalously Low-Friction Effect in Block Rock Media

Figure 9

Vertical acceleration curve of work block under different impact loading frequencies. (a) f = 1000 Hz. (b) f = 2500 Hz. (c) f = 5000 Hz. (d) f = 7500 Hz.

(a)

(b)

(c)

(d)