Abstract: The 8-scenario ALOS-PLASAR data of Xiejiaji mine in Huainan city is processed using the small baseline technology, SBAS-InSAR, from January 2007 to February 2011. Firstly, the SBAS-InSAR technology is used to extract the time-series deformation rate of the mining area to obtain the cumulative overall settlement trend. Then it analyzes the key settlement areas such as roads, railways, new and old mining areas, etc. From the analysis of the monitoring results, it can be seen that the Shijian Lake west road and the dam are in the lower overall. In the sinking state, the western half of the Xizhang railway is in an uplifted state, while the eastern half is sinking severely. The Dongfang mine and the Xiner mining area are in different degrees of decline.

Key words: ground subsidence, ALOS-PLASAR, SBAS-InSAR, deformation monitoring