Blasting Vibration Law and Prediction in the Near-Field of Tunnel

Table 3

Partial vibration acceleration data.

Horizontal distance from measuring point to tunnel face (m)	Maximum single-stage charge (kg)	SD (m·kg^−1/2)	PPA (m·s^−2)
3.0	89.4	0.32	4366
6.5	129.6	0.57	733
10.0	101.9	0.99	1321
13.5	115.3	1.26	307
17.0	110.5	1.62	170
20.5	110.2	1.95	1011
24.0	106.7	2.32	86
27.5	124.4	2.47	322
31.0	85.3	3.36	163
34.5	81.9	3.81	58
38.0	97.5	3.85	396
41.5	104.6	4.06	30
45.0	104.9	4.39	149
48.5	115.2	4.52	22