Identifying Delay Time of Detonator for a Millisecond Blasting

Table 1

Blasting parameters.

Hole name	Hole no.	Number of holes	Charge quantity		Detonator order
			Each hole	Total weight (kg)
Empty hole	1	1	0	0.0
Cutting hole	2–7	6	5	9.0	1
Auxiliary hole	8–10	3	5	4.5	3
Auxiliary hole	11–12	2	5	3.0	5
Auxiliary hole	13–18	6	4.5	8.1	7
Auxiliary hole	19–21	3	4	3.6	8
Auxiliary hole	22–27	6	3	5.4	9
Auxiliary hole	28–32	5	3	4.5	10
Auxiliary hole	33–38	6	2.5	4.5	11
Auxiliary hole	39–46	8	2.5	6	13
Peripheral hole	47–54	8	2	4.8	15
Peripheral hole	55–72	18	1.5	8.1	19
Bottom hole	74–79	6	3	5.4	15
Bottom hole	73–80	2	3	1.8	19
Total	—	80	—	68.7