Shuangyashan Mine Surface Deformation Monitoring Based On InSAR

Land subsidence is one of the most common and the most serious geological disasters caused by mineral exploitation. The happening of land subsidence greatly destroys the environment of mining area and causes impoverishment of soil and barren soil. Therefore, implementing the monitoring of land subsidence caused by mineral exploitation is an urgent work, which is not only an important basis of mastering the happening and development regularity of land subsidence in an accurate way and making disaster management and ecological recovery in mining area, but also an important scientific reference for studying the mode of exploitation causing disaster and disaster warning.This research monitors geological disaster causing ground deformation in Shangya mining area by making use of synthetic aperture radar interferometry(In SAR), realizes exploitation subsidence positioning in mining area based on In SAR pseudo coherent technique and delineates area of land subsidence; realizes the detection of mining shape variable level with comprehensive adoption of D-In SAR,SBAS-In SAR Make correlation verification of attained interferometric data and precise leveling survey data in research area and verify if measurement data is correct.This research extracts land subsidence information of research area in three months and attains 66 subsidence points of coal mining from October 2014 to December 2014 with adoption of TerraSAR data, the accumulated subsidence area is about 55km2 and the biggest subsidence rate at subsidence point is 4.5cm in 11 days.16, 2, 8 and 27 places of mining subsidence have been found in the four key mining areas under investigation respectively during monitoring period. Good corresponding exists in monitoring results and exploitation activity in mining area, which helps to master the history of mining area as well as the latest mining subsidence situation in an effective way and provides data support for the treatment and planning of environment in mining area. Process TerraSAR data with adoption of SBAS technology, attain deformation time series results in Jixian mining area during October 2014 and December 2014, make time series analysis of characteristics, find out that a large number of mining subsidence happened during monitoring period and deformation rate at the edge of subsidence reaches 20 mm per month. Based on above analysis, it can grasp that the deformation regularity of coal mining with the passing of time can instruct mining production in an effective way. Make correlation analysisof precise leveling data during same time period in mining area and find out that that there is no obvious difference in InSAR data and real-time monitoring data, which can be promoted in a large scale. Implement monitoring research on time series of mining subsidence by using SBAS technology and make subsidence regularity analysis of coal mining based on time series test results.