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

Table 7

The dynamic response of the existing tunnel to blasting under different clear distance conditions.

Items	Vibration velocity (cm/s)			Lining stress (MPa)			Displacement (mm)
Tunnel position	8.45	16.90	25.35	8.45	16.90	25.35	Direction	8.45	16.90	25.35
Vault	1.45	1.05	0.26	−3.20	−3.20	−3.20	X	1.71	0.88	1.12
Left waist	3.54	2.30	1.29	5.32	4.02	2.90
Left foot	8.64	5.30	3.10	1.48	1.13	0.46	Y	3.25	3.10	3.10
Bottom	5.76	3.55	2.06	0.35	0.21	0.08
Right foot	2.45	1.68	0.91	1.48	1.13	0.46	Z	6.00	5.85	5.81
Right waist	1.26	0.84	0.38	5.32	4.02	2.90