Experimental Study on Crack Extension Rules of Hydraulic Fracturing Based on Simulated Coal Seam Roof and Floor

<table class="figure-group"><tr class="fig-image" id="a"><td><object data="https://static-preview.hindawi.com/articles/geofluids/volume-2022/7462201/figures/7462201.fig.0011a.svgz" name="7462201.fig.0011a" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(a) </b>The direction of hydraulic fracture extension</td></tr><tr class="fig-image" id="b"><td><object data="https://static-preview.hindawi.com/articles/geofluids/volume-2022/7462201/figures/7462201.fig.0011b.svgz" name="7462201.fig.0011b" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(b) </b>The shape of the specimen after opening</td></tr><tr class="fig-image" id="c"><td><object data="https://static-preview.hindawi.com/articles/geofluids/volume-2022/7462201/figures/7462201.fig.0011c.svgz" name="7462201.fig.0011c" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(c) </b>Water pressure fracture surface</td></tr></table>

<div>The hydraulic fracturing morphology of equivalent confining pressure.</div>

Geofluids

fig11

Figure 11

Figure 11: Experimental Study on Crack Extension Rules of Hydraulic Fracturing Based on Simulated Coal Seam Roof and Floor 