Research And Application Of InSAR-Based Surface Deformation Fields In Mines

The traditional method of monitoring surface deformation in mining areas usually can only obtain scattered data,with the development of radar satellite technology,In SAR technology(i.e.Synthetic Aperture Radar Interferometry)and its derivatives,PS-In SAR and D-In SAR,have been gradually applied to the monitoring of ground settlement in mining areas in recent years,and they have the advantages of all-weather,all-time,large coverage,high frequency and high precision,realizing the dynamic monitoring of the surface area range of mining areas.However,when these two methods are applied to mining areas,the PS-In SAR technique and the long-period DIn SAR technique have blind spots(missing feature points)due to the large deformation and complex spatial variation in mining areas,which makes it difficult to construct a complete and high-precision surface settlement deformation field in mining areas.In order to address the above-mentioned problem of blind spots in the deformation field monitoring of mines,this paper first conducted a feasibility experiment of PS-In SAR technology in the deformation monitoring of mines,and verified the applicability and accuracy of this technology in the surface deformation monitoring of mines;then the high-precision PS-In SAR deformation monitoring results of the target mines were combined with the high-precision long-and shortperiod combined D-In SAR deformation results to maximize the deformation characteristics of the monitoring area;Then,an effective interpolation method suitable for mining areas is proposed,i.e.,the multi-factor interpolation method that integrates DEM data and deformation characteristics data in the solution equation,which can better solve the problem of decoherence due to the In SAR technique applied to surface deformation monitoring in mines.Finally,a complete surface subsidence deformation field of the mine is constructed,and the deformation characteristics of the constructed deformation field of the ascending and descending rails are solved on the basis of the existing three-dimensional solution to obtain the vertical distribution results of the target mine,and a full range of deformation characteristics of the target mine is obtained.