Vibration Response Characteristics of Adjacent Tunnels under Different Blasting Schemes

Figure 9

Comparison of 3D vibration velocities of typical blasting segments with different footage conditions at the monitoring points A, B, C, and D positioned on the arch of the completed tunnel at a position commensurate with the corresponding blasting face. (a) Cutting segment, (b) floor segment, and (c) contour segment.

(a)

(b)

(c)