Study on the Damage Model of Coal Rock Caused by Hydraulic Pressure and Electrical Impulse in Borehole

<table class="figure-group"><tr class="fig-image" id="a"><td><object data="https://static.hindawi.com/articles/geofluids/volume-2021/6627242/figures/6627242.fig.0013a.svgz" name="6627242.fig.0013a" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(a) </b>Effective bearing area of coal-rock mass</td></tr><tr class="fig-image" id="b"><td><object data="https://static.hindawi.com/articles/geofluids/volume-2021/6627242/figures/6627242.fig.0013b.svgz" name="6627242.fig.0013b" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(b) </b>Damage variable of coal -rock mass</td></tr></table>

<div>Variation of the effective bearing area and damage variables of coal-rock mass at 11 kV voltage and different hydrostatic pressures.</div>

Geofluids

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Figure 13

Figure 13: Study on the Damage Model of Coal Rock Caused by Hydraulic Pressure and Electrical Impulse in Borehole 