Optimization Analysis of Controlled Blasting for Passing through Houses at Close Range in Super-Large Section Tunnels

Table 1

Parameters of the upper step blasting.

Detonator segment	Hole depth (m)	Hole number	Blast hole name	Explosive charge per hole (kg)	Single-stage charge (kg)
1	4.5	16	Cutting hole	1.5	24
3	4	12	Driving hole	1.2	14.4
5	3	8	Driving hole	0.9	7.2
7	3	8	Driving hole	0.9	11.7
7	3	5	Floor hole	0.9
9	3	7	Driving hole	0.9	15.3
9	3	6	Inner ring hole	0.9
9	3	4	Floor hole	0.9
11	3	6	Inner ring hole	0.9	13.5
11	3	2	Floor hole	0.9
11	3	7	Driving hole	0.9
13	2	8	Around hole (odd)	0.3	17.1
13	2	8	Around hole (even)	0.6
13	3	9	Inner ring hole	0.9
13	3	2	Floor hole	0.9
15	3	2	Floor hole	1.2	13.8
15	3	12	Around hole (odd)	0.3
15	3	13	Around hole (even)	0.6
Total	—	135	—	—	116.4