A Study of Blast Vibration Propagation Law under Negative Altitude Terrains

Table 4

Blasting parameters and monitoring data.

Data collection	Measurement point	Distance		Max. charge weight per delay, Q (kg)	PPV, (cm·s^−1)
		Horizontal distance from blasting center, R (m)	Vertical distance from blasting center, H (m)
Group 1	1	60	−4	14	0.689	0.394	0.543
	2	70	−6	12	0.383	0.233	0.260
	3	80	−8	10	0.256	0.237	0.252
	4	150	−8.5	12	0.321	0.200	0.207
	5	155	−12	10	0.127	0.095	0.092
Group 2	1	60	−4	14	0.636	0.391	0.435
	2	70	−6	12	0.373	0.249	0.245
	3	80	−8	10	0.315	0.224	0.213
	4	150	−8.5	12	0.407	0.248	0.217
	5	155	−12	10	0.287	0.126	0.127