Spatial Variation Law of Blasting Vibration in Layered Strata under Blasting Excavation of Subway Tunnel

Table 1

Blasting vibration of the civil air defense tunnel.

Excavation progress of upper bench of the left section (m)	Horizontal distance (m)	Blasting center distance (m)	Scaled distance (m·kg^−1/3)	Vertical vibration velocity (cm/s)	Resultant velocity (cm/s)
92	6.15	14.91	6.13	4.03	4.67
	12.12	18.20	7.48	2.07	2.54
	18.11	22.64	9.30	1.35	1.82
98	6.32	14.98	6.16	4.85	4.94
	18.2	22.71	9.33	1.68	1.93
102	1.87	13.71	5.63	6.5	6.55
	6.45	15.03	6.18	5.28	5.33
	12.32	18.34	7.54	2.46	2.47
103.5	2.02	13.73	5.64	6.24	6.27
	6.51	15.06	6.19	5.7	5.84
	12.36	18.36	7.55	3.17	3.21
105.5	6.57	15.09	6.20	5.76	5.79
	18.34	22.82	9.38	1.56	1.68