Monitoring of temporal and spatial evolution of surface deformation in Yuncheng Mining Area with DS-InSAR

Yuncheng Mining Area is rich in coal reserves, and a large number of underground coal mining leads to different degrees of ground subsidence. In order to understand the development of the deformation in mining region, both the 55 scene sentinel-1A radar images obtained from January 2018 to November 2019 and DS-InSAR method are employed for surface deformation observation and analysis. The monitoring results indicate that the DS-InSAR could effectively extract the distributed targets distributed in bare land and sparse low-vegetation areas, which can significantly increase the number of monitoring points in Yuncheng Mining Area and its distribution is more uniform, and can more comprehensively reflect the spatial distribution of surface deformation in Yuncheng Mining Area. The deformation distribution map yields that the subsidence of Lilou and Guotun coal mines in Yuncheng Mining Area is relatively large with maximum annual subsidence of 100 mm, while the deformation in Pengzhuang and Zhaolou Coal Mines is small. Generally, the occurrence of deformation in the four major coal mines in Yuncheng Mining Area is closely related to underground mining activities.