Study on Pore and Fissure Structure Characteristics of Deep Soft Coal Rock

<table class="figure-group"><tr class="fig-image" id="a"><td><object data="https://static-preview.hindawi.com/articles/geofluids/volume-2021/1475926/figures/1475926.fig.004a.svgz" name="1475926.fig.004a" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(a) </b>Endogenous fissure</td></tr><tr class="fig-image" id="b"><td><object data="https://static-preview.hindawi.com/articles/geofluids/volume-2021/1475926/figures/1475926.fig.004b.svgz" name="1475926.fig.004b" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(b) </b>Exogenous tensile fissure</td></tr><tr class="fig-image" id="c"><td><object data="https://static-preview.hindawi.com/articles/geofluids/volume-2021/1475926/figures/1475926.fig.004c.svgz" name="1475926.fig.004c" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(c) </b>Exogenous shear fissure</td></tr><tr class="fig-image" id="d"><td><object data="https://static-preview.hindawi.com/articles/geofluids/volume-2021/1475926/figures/1475926.fig.004d.svgz" name="1475926.fig.004d" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(d) </b>Exogenous tensile fissure are filled with debris</td></tr></table>

<div>Fissure characteristics under scanning electron microscope.</div>

Geofluids

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Figure 4

Figure 4: Study on Pore and Fissure Structure Characteristics of Deep Soft Coal Rock 