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

Table 5

The dynamic response of the existing tunnel to blasting under different surrounding rock conditions.

Items	Vibration velocity (cm/s)		Lining stress (MPa)			Displacement (mm)
Tunnel position	III	IV	III	IV	Direction	III	IV
Vault	1.05	0.90	−3.20	−3.20	X	0.88	0.96
Left waist	2.30	2.01	4.02	3.94
Left foot	5.30	4.95	1.13	1.06	Y	3.10	3.09
Bottom	3.55	3.22	0.21	0.20
Right foot	1.68	1.42	1.13	1.06	Z	5.85	5.82
Right waist	0.84	0.75	4.02	3.94