Research Article

Dynamic Monitoring and Research on the Evolution of the Damage of Weakly Consolidated Coal Floor under Dynamic Pressure Using Distributed Optical Fiber

Figure 13

Working face is 86.7 m away from the orifice (a). Working face is 48.0 m away from the orifice (b). Working face is 23.0 m away from the orifice (c). Working face is 12.6 m away from the orifice (d).
(a)
(b)
(c)
(d)