Influence of Water-Resisting Layer Thickness on Fracture Evolution in Karst Tunnel and Control Measures

<table class="figure-group"><tr class="fig-image" id="a"><td><object data="https://static-preview.hindawi.com/articles/geofluids/volume-2022/3889950/figures/3889950.fig.007a.svgz" name="3889950.fig.007a" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(a) </b>The tunnel face is 23 m away from the karst cave</td></tr><tr class="fig-image" id="b"><td><object data="https://static-preview.hindawi.com/articles/geofluids/volume-2022/3889950/figures/3889950.fig.007b.svgz" name="3889950.fig.007b" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(b) </b>The tunnel face is 13 m away from the karst cave</td></tr><tr class="fig-image" id="c"><td><object data="https://static-preview.hindawi.com/articles/geofluids/volume-2022/3889950/figures/3889950.fig.007c.svgz" name="3889950.fig.007c" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(c) </b>The tunnel face is 3 m away from the karst cave</td></tr></table>

<div>Block volumetric stress of surrounding rock under different thickness of water-resisting layer.</div>

Geofluids

fig7

Figure 7

Figure 7: Influence of Water-Resisting Layer Thickness on Fracture Evolution in Karst Tunnel and Control Measures 