Method for monitoring and resolving three-dimensional ground surface deformation of industrial and mining area by means of multi-source SAR image

Abstract

The invention discloses a method for monitoring and resolving three-dimensional ground surface deformation of an industrial and mining area by means of a multi-source SAR image. The method is based on SAR image data of different rails before and after deformation. Deformation information in different radar satellite visual line directions are obtained through combining D-InSAR technology and Offset-tracking technology. Deformation information in different radar satellite azimuth directions is acquired through combining MAI technology and Offset-tracking technology. Based on this fact, different deformation information monitoring precisions in the viewing line direction and the azimuth direction are considered. Weights are determined in a Helmert variance component estimation manner. A three-dimensional land surface deformation conversion model is established and resolved, thereby obtaining a three-dimensional deformation field of the industrial and mining area. The method can settle a problem of easy restriction by factors such as decorrelation and small monitorable deformation gradient. Furthermore, the true ground surface deformation condition is more comprehensively monitored through the multi-source SAR image.

Description

technical field [0001] The invention relates to a monitoring and solving method for three-dimensional surface deformation in an industrial and mining area fused with multi-source SAR images. Background technique [0002] Surface deformation in industrial and mining areas seriously endangers ground construction facilities and the natural environment, and affects human living environment, life and property safety, and local economic development. Comprehensive monitoring of surface deformation in mining areas and in-depth study of deformation formation mechanism and change law are of great significance for rational exploitation of underground mineral resources and control of sustainable development of industrial and mining areas. [0003] The traditional geodetic leveling and GPS monitoring of the surface deformation of the mining area all obtain the deformation information of a point. With the development of surveying and mapping methods and the further expansion of the applic...

AI Technical Summary

Problems solved by technology

However, affected by parameters such as SAR image wavelength, incident angle, and ground resolution, InSAR technology only has the ability to monitor deformation within a certain range of deformation gradients.

As the surface of industrial and mining areas undergoes different degrees of surface deformation as mining progresses, it may reach the meter level in a short period of time, which seriously exceeds the monitoring capability of conventional InSAR technology based on differential interferometric phase information, resulting in SAR impact decoherence

Secondly, InSAR technology can only obtain one-dimensional or two-dimensional surface deformation information, rather than a three-dimensional deformation field that directly and comprehensively reflects the characteristics of surface deformation.

Images