103 / 2023-05-30 09:38:39

基于融合全分辨率和多视法SBAS-InSAR矿区沉降监测

SBAS-InSAR,全分辨率,多视,矿区沉降监测

            Coal is an underground non-renewable fossil energy resource, known as "industrial food". Coal occupies a dominant position in the production and consumption of primary energy, and coal as the main energy can not be replaced, can reduce the operation cost of the national economy, so the coal resource occupies an important position in the energy of our country. The mining of coal resources will lead to the destruction of land resources and the deterioration of ecological environment, especially the surface subsidence in mining areas, so the monitoring of surface subsidence in mining areas has important application value and practical significance for the assessment of potential geological disasters and analysis of subsidence mechanism in mining areas. Small baseline subset Interferometric Synthetic Aperture Radar（SBAS-InSAR） is a land subsidence monitoring technology gradually developed in recent years, It can overcome the spatio-temporal incoherence restriction of InSAR, restrain the influence of topography and atmosphere, and increase the time sampling rate, showing great advantages in the monitoring of land subsidence.

           This paper uses SBAS-InSAR technology to monitor Yuncheng coal mine in Heze, Shandong Province. A total of 19 Sentinel-1A SAR images from December 3, 2016 to June 20, 2018 were selected. With SRTM DEM as the assistant elevation data, the images were processed by the full resolution method and the multi-view method, respectively, to obtain the ground subsidence information of the mining area, and the results of the two methods were fused. The accuracy of the obtained SBAS observation results is verified with the actual leveling results. The results show that:

           (1) During the monitoring period, two settlement funnels were mainly distributed in the study area, forming a relatively obvious settlement center. The maximum subsidence amount is -404.17mm and the maximum subsidence rate is -269.11mm/a.

           (2) The SBAS-InSAR technology can accurately detect the subsidence location. The multi-look method is used to monitor the small subsidence at the edge of the sinking basin and the full-resolution method is adopted to monitor the large gradient deformation at the center of the sinking basin. The settlement trend of the monitoring data is consistent with that of the leveling data, and the accuracy of the monitoring results is up to centimeters. It can be concluded that SBAS-InSAR technology is reliable in deformation monitoring in mining area. Using this technology to monitor surface deformation in mining area can provide scientific basis for safe mining and comprehensive control of coal mine subsidence area on the one hand. On the other hand, it is of great significance to the life safety of people in the mining area.