Study on Stability of Tunnel Surrounding Rock and Precipitation Disaster Mitigation in Flowing Sand Body

<table class="figure-group"><tr class="fig-image" id="a"><td><object data="https://static.hindawi.com/articles/geofluids/volume-2021/6043807/figures/6043807.fig.009a.svgz" name="6043807.fig.009a" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(a) </b>Clear water flows out after the tube is down</td></tr><tr class="fig-image" id="b"><td><object data="https://static.hindawi.com/articles/geofluids/volume-2021/6043807/figures/6043807.fig.009b.svgz" name="6043807.fig.009b" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(b) </b>Effect drawing after stepping method construction on steps</td></tr></table>

<div>Effect picture after downpipe and after precipitation.</div>

Geofluids

fig9

Figure 9

Figure 9: Study on Stability of Tunnel Surrounding Rock and Precipitation Disaster Mitigation in Flowing Sand Body 