Development and Application of an Intelligent Evaluation and Control Platform for Tunnel Smooth Blasting

Table 4

Index values of tunnel smooth blasting before implementation.

Number of sections for measurement	Overbreak area (m^2)	Underbreak area (m^2)	Maximum overbreak (m)	Average linear overbreak (m)
1	6.01	0.00	0.71	0.32
2	5.74	0.02	0.61	0.29
3	5.61	0.00	0.62	0.30
4	5.39	0.00	0.60	0.29
5	5.33	0.05	0.59	0.30