A Numerical Investigation on the Hydraulic Fracturing Effect of Water Inrush during Tunnel Excavation

<table class="figure-group"><tr class="fig-image" id="a"><td><object data="https://static-preview.hindawi.com/articles/geofluids/volume-2020/6196327/figures/6196327.fig.009a.svgz" name="6196327.fig.009a" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(a) </b>Crack initiation stage</td></tr><tr class="fig-image" id="b"><td><object data="https://static-preview.hindawi.com/articles/geofluids/volume-2020/6196327/figures/6196327.fig.009b.svgz" name="6196327.fig.009b" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(b) </b>Crack expansion stage</td></tr><tr class="fig-image" id="c"><td><object data="https://static-preview.hindawi.com/articles/geofluids/volume-2020/6196327/figures/6196327.fig.009c.svgz" name="6196327.fig.009c" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(c) </b>Crack penetration stage</td></tr></table>

<div>Crack field and acoustic emission evolution.</div>

Geofluids

fig9

Figure 9

Figure 9: A Numerical Investigation on the Hydraulic Fracturing Effect of Water Inrush during Tunnel Excavation 