Damage Mechanism and Wave Attenuation Induced by Blasting in Jointed Rock

Figure 17

Frequency-spectrum evolutions of P-waves monitored by #1 and #3 geophones.

(a) 2019-10-16 03 : 48 : 13

(b) 2019-10-20 05 : 44 : 32

(c) 2019-10-22 03 : 19 : 23