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.006a.svgz" name="6196327.fig.006a" 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.006b.svgz" name="6196327.fig.006b" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(b) </b>Crack propagation stage (Step 2-2)</td></tr><tr class="fig-image" id="c"><td><object data="https://static-preview.hindawi.com/articles/geofluids/volume-2020/6196327/figures/6196327.fig.006c.svgz" name="6196327.fig.006c" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(c) </b>Crack propagation stage (Step 2-11)</td></tr><tr class="fig-image" id="d"><td><object data="https://static-preview.hindawi.com/articles/geofluids/volume-2020/6196327/figures/6196327.fig.006d.svgz" name="6196327.fig.006d" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(d) </b>Crack propagation stage (Step 2-21)</td></tr><tr class="fig-image" id="e"><td><object data="https://static-preview.hindawi.com/articles/geofluids/volume-2020/6196327/figures/6196327.fig.006e.svgz" name="6196327.fig.006e" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(e) </b>Crack penetration stage</td></tr></table>

<div>The minimum principal stress evolution.</div>

Geofluids

fig6

Figure 6

Figure 6: A Numerical Investigation on the Hydraulic Fracturing Effect of Water Inrush during Tunnel Excavation 