Study on the Attenuation Characteristics of Seismic Wave Energy Induced by Underwater Drilling and Blasting

Table 4

Statistics for monitoring data.

Parameter	Unit	Min.	Max.	Mean
Maximal charge per delay	kg	32	56	46.4
Total charge	kg	320	560	440
Distance from the blast-face to the monitoring point	m	65	260	87.5
Altitude from the blast-face to the monitoring point	m	20	40	29.2
Depth of blasthole	m	8.6	14.8	12.2
Peak particle velocity	cm/s	0.250	1.963	1.027