Researches on the Influence of Blasting of Newly Built Tunnel on the Existing Tunnel Structure with Small Cross Angle

Table 6

The dynamic response of the existing tunnel to blasting under different cross angle conditions.

Items	Vibration velocity (cm/s)			Lining stress (MPa)			Displacement (mm)
Tunnel position	15	30	45	15	30	45	Direction	15	30	45
Vault	1.34	1.05	0.68	−3.20	−3.20	−3.20	X	0.80	0.88	1.30
Left waist	2.68	2.30	2.01	4.60	4.02	3.52
Left foot	5.95	5.30	4.66	1.65	1.13	0.51	Y	3.10	3.10	3.15
Bottom	4.25	3.55	2.85	0.32	0.21	0.16
Right foot	2.12	1.68	1.22	1.66	1.13	0.51	Z	5.88	5.85	5.83
Right waist	0.98	0.84	0.72	4.45	4.02	3.52