Experimental Study on the Application of BOTDA in the Overlying Strata Deformation Monitoring Induced by Coal Mining

<table class="figure-group"><tr class="fig-image" id="a"><td><object data="https://static.hindawi.com/articles/js/volume-2019/3439723/figures/3439723.fig.005a.svgz" name="3439723.fig.005a" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(a) </b>Face 2 advance to 0 mm</td></tr><tr class="fig-image" id="b"><td><object data="https://static.hindawi.com/articles/js/volume-2019/3439723/figures/3439723.fig.005b.svgz" name="3439723.fig.005b" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(b) </b>Face 2 advance to 480 mm</td></tr><tr class="fig-image" id="c"><td><object data="https://static.hindawi.com/articles/js/volume-2019/3439723/figures/3439723.fig.005c.svgz" name="3439723.fig.005c" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(c) </b>Face 2 advance to 680 mm</td></tr><tr class="fig-image" id="d"><td><object data="https://static.hindawi.com/articles/js/volume-2019/3439723/figures/3439723.fig.005d.svgz" name="3439723.fig.005d" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(d) </b>Face 2 advance to 840 mm</td></tr><tr class="fig-image" id="e"><td><object data="https://static.hindawi.com/articles/js/volume-2019/3439723/figures/3439723.fig.005e.svgz" name="3439723.fig.005e" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(e) </b>Face 2 advance to1440mm</td></tr><tr class="fig-image" id="f"><td><object data="https://static.hindawi.com/articles/js/volume-2019/3439723/figures/3439723.fig.005f.svgz" name="3439723.fig.005f" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(f) </b>Face 2 advance to 2400 mm</td></tr></table>

<div>The optic fiber frequency shift of face 2 mining.</div>

Journal of Sensors

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Figure 5

Figure 5: Experimental Study on the Application of BOTDA in the Overlying Strata Deformation Monitoring Induced by Coal Mining 