Influence of Key Strata on the Gas Downward Leakage Law in Dual-System of Coal Seam

<table class="figure-group"><tr class="fig-image" id="a"><td><object data="https://static.hindawi.com/articles/geofluids/volume-2020/8897260/figures/8897260.fig.007a.svgz" name="8897260.fig.007a" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(a) </b>Primary fracture of the higher key strata</td></tr><tr class="fig-image" id="b"><td><object data="https://static.hindawi.com/articles/geofluids/volume-2020/8897260/figures/8897260.fig.007b.svgz" name="8897260.fig.007b" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(b) </b>Periodic fracture of the higher key strata</td></tr></table>

<div>Fracture characteristics of the higher key strata.</div>

Geofluids

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Figure 7

Figure 7: Influence of Key Strata on the Gas Downward Leakage Law in Dual-System of Coal Seam 