A Study of Blast Vibration Propagation Law under Negative Altitude Terrains

Table 6

Relative errors of the predicted velocities.

Data collection	Measurement point	PPV, (cm·s^−1)			Predicted velocity from Sadovsky’s formula, (cm/s)	Predicted velocity from the CRSRI formula, (cm/s)	Relative error of Sadovsky’s formula, (%)	Relative error of the CRSRI formula, (%)
		Group1	1	0.689 0					0.394 0	0.543 0	0.536 7	0.749 7	22.11	8.81
2	0.383 0		0.233 0	0.260 0	0.432 0	0.380 4	12.78	0.68
3	0.256 0		0.237 0	0.252 0	0.351 8	0.229 8	37.44	10.24
4	0.321 0		0.200 0	0.207 0	0.193 2	0.281 5	39.82	12.31
5	0.127 0		0.095 0	0.092 0	0.175 0	0.149 3	37.79	17.56
Group 2	1	0.636 0	0.391 0	0.435 0	0.536 7	0.749 7	15.62	17.88
	2	0.373 0	0.249 0	0.245 0	0.432 0	0.380 4	15.81	1.98
	3	0.314 7	0.224 0	0.213 0	0.351 8	0.229 8	11.80	26.98
	4	0.407 0	0.248 0	0.217 0	0.193 2	0.281 5	52.54	30.84
	5	0.287 0	0.126 0	0.127 0	0.175 0	0.149 3	39.03	47.98
Average error							28.47	17.53