Study on Roof Presplitting Mechanism and Deformation Control of Reused Roadway in Compound Soft Rock by Roof Presplitting Approach

<table class="figure-group"><tr class="fig-image" id="a"><td><object data="https://static-preview.hindawi.com/articles/geofluids/volume-2022/9144937/figures/9144937.fig.007a.svgz" name="9144937.fig.007a" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(a) </b>Presplitting interval 0 m</td></tr><tr class="fig-image" id="b"><td><object data="https://static-preview.hindawi.com/articles/geofluids/volume-2022/9144937/figures/9144937.fig.007b.svgz" name="9144937.fig.007b" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(b) </b>Presplitting interval 0.5 m</td></tr><tr class="fig-image" id="c"><td><object data="https://static-preview.hindawi.com/articles/geofluids/volume-2022/9144937/figures/9144937.fig.007c.svgz" name="9144937.fig.007c" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(c) </b>Presplitting interval 1 m</td></tr><tr class="fig-image" id="d"><td><object data="https://static-preview.hindawi.com/articles/geofluids/volume-2022/9144937/figures/9144937.fig.007d.svgz" name="9144937.fig.007d" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(d) </b>Presplitting interval 1.5 m</td></tr><tr class="fig-image" id="e"><td><object data="https://static-preview.hindawi.com/articles/geofluids/volume-2022/9144937/figures/9144937.fig.007e.svgz" name="9144937.fig.007e" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(e) </b>Presplitting interval 2 m</td></tr></table>

<div>Strain energy accumulation and dissipation curve of presplitting fissure propagation.</div>

Geofluids

fig7

Figure 7

Figure 7: Study on Roof Presplitting Mechanism and Deformation Control of Reused Roadway in Compound Soft Rock by Roof Presplitting Approach 