Coal Mining Deformation Monitoring of Wuda District in Wuhai City Based on SBAS-InSAR

Abstract

Wuda District of Wuhai City in Inner Mongolia Autonomous Region is rich in mineral resources, with proven coal reserves of 660 million tons. It is of great significance for local economic development and industrial production safety to monitor and study the dynamic settlement of Wuda Mining Area. The small baseline subset Interferometric Synthetic Aperture Radar (SBAS-InSAR) technology has been widely used in surface deformation monitoring for its easy to realize long-term monitoring. In this paper, the 20 scene ascending orbit Sentinel1A images from August 2019 to November 2020 are used. The geographical coordinate of the study area is 39°20’–39°40’N, 106°30’–106°50’E and the total area is 219.716 square kilometers. The displacement results show that the maximum subsidence velocity is about 198 mm/yr. The terrain subsidence mainly occurs in the west of Wuda District, which is mainly mountain areas and mining areas, including Wuhushan coal mine, Huangbaici coal mine and Suhaitu Coal Mine and the surface of the mining areas showed a long-term subsidence trend. The southeastern part of the study area is mainly residential area, and the surface uplift is closely related to human production activities.