Blasting Vibration Law and Prediction in the Near-Field of Tunnel

Table 1

Blasting parameters of upper bench of tunnel.

Type of blasting hole	Delay time (ms)	Numbers	Depth (m)	Charge per hole (kg)	Charge (kg)
Cut hole	10	6	3	1	6
	60	16	4.7	3.3	52.8
Caving hole	110	8	4.5	3	24
	160	8	4.3	2.4	19.2
	210	8	4	2.4	19.2
	260	13	4	2.4	52
	310	16	4	2.4	38.4
	360	8	4	2.4	19.2
		13	4	1.8	23.4
Peripheral hole	410	25	1	0.4	10
		50	4	1	50
Bottom hole	260	5	4	3.6	18
	410	12	4	3.6	43.2
Total		188			375.4