Dynamic Effect and Control of Key Strata Break of Immediate Roof in Fully Mechanized Mining with Large Mining Height

<table class="figure-group"><tr class="fig-image" id="a"><td><object data="https://static.hindawi.com/articles/sv/volume-2015/657818/figures/657818.fig.007a.svgz" name="657818.fig.007a" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(a) </b>Distance to the roof is 50 m</td></tr><tr class="fig-image" id="b"><td><object data="https://static.hindawi.com/articles/sv/volume-2015/657818/figures/657818.fig.007b.svgz" name="657818.fig.007b" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(b) </b>Distance to the roof is 15 m</td></tr></table>

<div>Vertical stress variation along with face advancement.</div>

Shock and Vibration

fig7

Figure 7

Figure 7: Dynamic Effect and Control of Key Strata Break of Immediate Roof in Fully Mechanized Mining with Large Mining Height 