Influencing Mechanism of Detonator Location on Blasting Vibration with Electronic Initiation Technology

Table 1

Parameters of vertical boreholes in the blast experiments.

Blast hole no.	Parameters of boreholes				Parameters of charge				Initiation mode
	Diameter (mm)	Depth (cm)	Hole pitch (cm)	Hole spacing (cm)	Diameter (mm)	Length (cm)	Stemming length (cm)	Charge per hole (kg)
1	76	800	160	185	50	600	200	12.0	Top and bottom initiated
2	76	800	160	185	50	600	200	12.0	Bottom
3	76	600	160	185	50	420	180	8.4	Middle
4	76	600	160	185	50	420	180	8.4	Bottom
5	76	450	160	185	50	270	180	5.4	Middle
6	76	450	160	185	50	270	180	5.4	Bottom
I	42	300	80	100	32	210	90	2.1	Middle
II	42	300	80	100	32	210	90	2.1	Bottom