Application of brillouin optical time domain analysis in strata movement similar material simulation experiment

In order to study the process of strata movement similar material simulation experiment, Brillouin optical time domain analysis( BOTDA) technology was use d to measure strain of similar material simulation. The two optical fibers were embedded in 3 m plane stress simulation and 5 dial gage were installed on the respective pos ition,comparing analysis of Brillouin frequency shift change of strata movement and deformation process. The results showed that BOTDA distributed optical fiber sensing t echnology could realize the distributed strain measurement of similar material simulation,not only could accurately measure the strata collapse state of the fiber along,but a Iso could sense and reflect the movement and deformation characteristics of strata at some point. This research provided a new testing method for similar material simulati on experiment,and had a positive effect on the development of similar material simulation testing technology.