Research on Pressure Relief Method of Close Floor Roadway in Coal Seam Based on Deformation and Failure Characteristics of Surrounding Rock in Deep Roadway

<table class="figure-group"><tr class="fig-image" id="a"><td><object data="https://static-preview.hindawi.com/articles/geofluids/volume-2022/5820228/figures/5820228.fig.0021a.svgz" name="5820228.fig.0021a" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(a) </b>Gas flow</td></tr><tr class="fig-image" id="b"><td><object data="https://static-preview.hindawi.com/articles/geofluids/volume-2022/5820228/figures/5820228.fig.0021b.svgz" name="5820228.fig.0021b" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(b) </b>Increase amplitude</td></tr></table>

<div>Change curve chart of initial gas flow in drill holes in 213 floor roadway of Qujiang Coal Mine.</div>

Geofluids

fig21

Figure 21

Figure 21: Research on Pressure Relief Method of Close Floor Roadway in Coal Seam Based on Deformation and Failure Characteristics of Surrounding Rock in Deep Roadway 

Figure 21 | Research on Pressure Relief Method of Close Floor Roadway in Coal Seam Based on Deformation and Failure Characteristics of Surrounding Rock in Deep Roadway 