Research on monitoring and stability evaluation of ground subsidence in gypsum mine goaf

The geological disasters caused by the ground deformation of goaf have brought huge security risks to ecological environment and society. Therefore, it is imminent realize effective monitoring stability analysis goaf. In this paper, taking gypsum mine in Diaodao District, Jingmen City as an example, through investigation overall structure distribution characteristics goaf, combined with mechanical parameters rock mass selected from site, InSAR GNSS technology are used analyze mine. Deformation carried out give full play advantages high vertical accuracy horizontal accuracy. Analyzed thickness conditions mined-out area pillar, roof overlying rock, established numerical model FLAC (3D) carry simulation on basis evaluate research shows that two subsidence areas three were deciphered DInSAR time series InSAR, respectively, deep buried monitored GNSS. surface dominated displacement, direction displacement whole points Finally, based conclusion gob different degrees deformation, analyzed, obtained simulation.