Research on the Law of Large-Scale Deformation and Failure of Soft Rock Based on Microseismic Monitoring

Figure 4

Schematic diagrams of the temporal, spatial, and magnitude distributions of microseismic activity during the excavation of the tunnel by drilling and blasting. (a) Distribution map of microseismic events on 4∼7 November 2017, (b) distribution map of microseismic events on 4∼10 November 2017, (c) distribution map of microseismic events on 4∼12 November 2017, and (d) distribution map of microseismic events on 4∼14 November 2017.

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