Research And Application Of Mine Subsidence Deformation Monitoring Method Based On D-InSAR And GIS Technology

Coal resources are very important natural resources and play an important role in the development of our national economy.However,the large-scale exploitation of resources in the mining area has caused surface subsidence and environmental problems to become increasingly serious.This has brought about significant ecological and environmental risks in the mining areas and increased the pressure on the ecological environment.The monitoring of surface deformation in coal mining areas can effectively provide a strong basis for the safe mining of coal mines and the treatment of ecological environment in mining areas.Because of the defects of time-consuming,laborious,and high monitoring costs,traditional surface deformation monitoring methods in coal mining areas have been unable to meet the technical needs of current social development.Therefore,the use of the existing surface deformation monitoring technology for settlement monitoring in coal mining areas is a worthy of in-depth exploration.This article mainly introduces the method of monitoring ground settlement in coal mining area based on the combination of D-InSAR and GIS technology,and collects relevant data.Based on the introduction of the basic principles of D-InSAR and its basic methods for measuring surface deformation,the influence factors of D-InSAR technology for monitoring surface deformation accuracy are analyzed.Then,the data processing processes of D-InSAR and GIS are introduced separately.Taking the Yuandian No.2 deposit in Huaibei as an example,the combined technology of D-InSAR and GIS is used to monitor the surface deformation of the mining area.In this paper,9 scenes of C-band READASAT-2 data and 6 scenes of SENTINEL-1 data are used to combine the adjacent interference pairs and perform differential interference processing.Ground surface sedimentation profiles during imaging were obtained for each image.Then the D-InSAR monitoring deformation map transformation coordinates into ArcGIS software processing,overlay mining plane CASS map to analyze the surface settlement,and GIS analysis results show that including settlement area extraction,profile analysis and overlay analysis to study the analysis work Surface settlement information above the surface.Through the verification of the results of each period,and compared with the measured data,the results show that the deformation map acquired by D-InSAR technology can clearly show the distribution of surface subsidence during mining of the three facets of Yuandian No.2 Mine.The location and scope of the subsidence in the area are basically the same as those in the well up-down map.The subsidence area and scope will change correspondingly with the advancing coal mining below the working surface.The combination of D-InSAR and GIS technology can timely and effectively monitor the surface subsidence of the mining area and provide a reliable basis for the monitoring of settlement disasters in the mining area.Finally,based on the combination of D-InSAR and GIS,this paper analyzes the data processing results of data preprocessing.In combination with the D-InSAR and GIS techniques,the settlement data obtained by the method of cubic spline interpolation combined with the grey prediction model GM(1,1)were fitted and predicted,and the sinking trend of the center area of the 7225 working face was obtained.Through analysis and understanding of the law of surface deformation in the mining area and the trend of settlement in the next stage,it provides an important basis for judging the major disasters in the mining area and ensuring the green and safe production of coal.