Research on Optimization of Coal Pressure Relief Borehole Parameters under High-Stress Conditions

<table class="figure-group"><tr class="fig-image" id="a"><td><object data="https://static-preview.hindawi.com/articles/geofluids/volume-2021/4673152/figures/4673152.fig.005a.svgz" name="4673152.fig.005a" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(a) </b>Single-row arrangement</td></tr><tr class="fig-image" id="b"><td><object data="https://static-preview.hindawi.com/articles/geofluids/volume-2021/4673152/figures/4673152.fig.005b.svgz" name="4673152.fig.005b" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(b) </b>Triple-flower arrangement</td></tr><tr class="fig-image" id="c"><td><object data="https://static-preview.hindawi.com/articles/geofluids/volume-2021/4673152/figures/4673152.fig.005c.svgz" name="4673152.fig.005c" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(c) </b>Double-row arrangement</td></tr></table>

<div>Energy density distribution in the coal unit.</div>

Geofluids

fig5

Figure 5

Figure 5: Research on Optimization of Coal Pressure Relief Borehole Parameters under High-Stress Conditions 