Abstract: Ground collapse is a geological disaster, which will become an urgent problem in urban development. The distributed
monitoring model test of ground collapse was carried out based on Brillouin Optical Frequency Domain Analysis (BOFDA)
technology in this study. A self-made model was used to test the deformation of ground collapse with different types and
thicknesses of soil conditions. The results indicated that the distributed optical fiber sensing technology based on BOFDA can
capture the occurrence and development process of ground collapse and reflect the deformation law of the soil effectively. The
research results provide a reference for popularization and application of this technique in deformation monitoring of ground
collapse.

Key words: BOFDA, distributed optical fiber monitoring, soil deformation, ground collapse