Abstract: InSAR method has become the high topic of domestic and international research, it’s unique advantages such as all-weather, all-day and passing through atmosphere containing cloud、mist、plants etc, used widely in the deformation monitoring of mining subsidence, but most of the literature can only monitor the mining subsidence value, and cannot make a thorough analysis about mining subsidence. To solve these above problems, D-InSAR technology were used to monitor a expressway and mining area, and through GIS overlay analysis, got the monitoring area’s subsidence range and deformation of expressway, made a analysis of expressway safety, compared with the conventional ground test results, the accuracy and reliability of InSAR monitoring were proved.

Key words: D-InSAR, expressway, deformation monitoring, GIS