Journal of Sensors / 2019 / Article / Fig 5

Research Article

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

Figure 5

The optic fiber frequency shift of face 2 mining.
(a) Face 2 advance to 0 mm
(b) Face 2 advance to 480 mm
(c) Face 2 advance to 680 mm
(d) Face 2 advance to 840 mm
(e) Face 2 advance to1440mm
(f) Face 2 advance to 2400 mm

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