Mechanism of Coal Seam Permeability Enhancement and Gas Outburst Prevention under Hydraulic Fracturing Technology

<table class="figure-group"><tr class="fig-image" id="a"><td><object data="https://static.hindawi.com/articles/geofluids/volume-2022/7151851/figures/7151851.fig.006a.svgz" name="7151851.fig.006a" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(a) </b>Hydraulic fracturing time 250 s</td></tr><tr class="fig-image" id="b"><td><object data="https://static.hindawi.com/articles/geofluids/volume-2022/7151851/figures/7151851.fig.006b.svgz" name="7151851.fig.006b" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(b) </b>Hydraulic fracturing time 350 s</td></tr><tr class="fig-image" id="c"><td><object data="https://static.hindawi.com/articles/geofluids/volume-2022/7151851/figures/7151851.fig.006c.svgz" name="7151851.fig.006c" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(c) </b>Hydraulic fracturing time 450 s</td></tr><tr class="fig-image" id="d"><td><object data="https://static.hindawi.com/articles/geofluids/volume-2022/7151851/figures/7151851.fig.006d.svgz" name="7151851.fig.006d" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(d) </b>Hydraulic fracturing time 650 s</td></tr></table>

<div>Characteristics of fracturing radius under different fracturing time (10 m<sup>3</sup>/h).</div>

Geofluids

fig6

Figure 6

Figure 6: Mechanism of Coal Seam Permeability Enhancement and Gas Outburst Prevention under Hydraulic Fracturing Technology 