Prediction of Bench Blasting Vibration on Slope and Safety Threshold of Blasting Vibration Velocity to Undercrossing Tunnel

Table 8

PPVs of field monitoring and numerical simulation at monitoring points.

Monitoring points	PPV of field monitoring (cm/s)			PPV of numerical simulation (cm/s)			Relative error of PPV (%)
	x	y	z	x	y	z	x	y	z
1#	6.94	3.61	7.48	7.3	3.75	8.03	5.19	3.88	7.35
2#	4.76	2.18	4.8	5.04	2.25	5.05	5.88	3.21	5.21
3#	3.16	1.87	2.98	3.34	2.06	3.13	5.70	10.16	5.03
4#	2.17	1.3	2.34	2.32	1.42	2.46	6.91	9.23	5.13
5#	1.32	1.08	1.65	1.42	1.17	1.54	7.58	8.33	-6.67