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

Table 4

Monitoring data on the tunnel surrounding rock.

Blasting times	Horizontal distance (m)	Vertical distance (m)	Maximum charge per delay (kg)	PPV (cm/s)			PVS (cm/s)
				x	y	z
1	304	38	310	0.7	0.7	0.6	0.9
2	365	28	315	0.5	0.3	0.4	0.6
3	94	28	315	3.5	0.9	1	3.8
4	88	17	243	5.8	4.5	5	6.2
5	85	16	174	6.9	9.5	8.5	13.3
6	109	15	168	4.6	7	8.4	9.4
7	109	29	168	1.4	1.8	1.9	2.5
8	111	29	168	4.7	3.8	2.7	5.9
9	58	15	165	4.4	7.1	7.1	7.3
10	98	15	252	7.9	8.9	9.3	12.1