Numerical Study on the Mechanism and Application of Artificial Free Surfaces in Bedrock Blasting of Shield Tunnels

<table class="figure-group"><tr class="fig-image" id="a"><td><object data="https://static.hindawi.com/articles/geofluids/volume-2021/9988120/figures/9988120.fig.007a.svgz" name="9988120.fig.007a" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(a) </b>Diagram of ultradeep drilling</td></tr><tr class="fig-image" id="b"><td><object data="https://static.hindawi.com/articles/geofluids/volume-2021/9988120/figures/9988120.fig.007b.svgz" name="9988120.fig.007b" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(b) </b>Diagram of blasting zone</td></tr></table>

<div>Layout diagram of the blasting holes.</div>

Geofluids

fig7

Figure 7

Figure 7: Numerical Study on the Mechanism and Application of Artificial Free Surfaces in Bedrock Blasting of Shield Tunnels 