The Mechanical and Fracturing of Rockburst in Tunnel and Its Acoustic Emission Characteristics

<table class="figure-group"><tr class="fig-image" id="a"><td><object data="https://static.hindawi.com/articles/sv/volume-2018/3503940/figures/3503940.fig.008a.svgz" name="3503940.fig.008a" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(a) </b>Horizontal stress of 100 kN</td></tr><tr class="fig-image" id="b"><td><object data="https://static.hindawi.com/articles/sv/volume-2018/3503940/figures/3503940.fig.008b.svgz" name="3503940.fig.008b" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(b) </b>Horizontal stress of 200 kN</td></tr><tr class="fig-image" id="c"><td><object data="https://static.hindawi.com/articles/sv/volume-2018/3503940/figures/3503940.fig.008c.svgz" name="3503940.fig.008c" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(c) </b>Horizontal stress of 300 kN</td></tr></table>

<div>Loading curves and AE parameters; (I: pregnant rockburst stage; II: small particle ejection stage; III: flake peeling stage; IV: rockburst occurrence stage).</div>

Shock and Vibration

fig8

Figure 8

Figure 8: The Mechanical and Fracturing of Rockburst in Tunnel and Its Acoustic Emission Characteristics 