Structure fracture and ground settlement deformation decomposition method based on force source inversion

Abstract

The invention discloses a method of structure fracture and ground settlement deformation decomposition based on force source inversion. Firstly, time-sequence interference processing is carried out onan SAR image of a study area to obtain a corresponding annual average deformation rate or a deformation time sequence; then a deformation area comprehensively influenced by ground settlement and structure fracture is selected for relevant parameter setting of an inversion model; then gridding is carried out on the inversion model, a compression amount of each grid is calculated through a Green'sfunction and a linear least square method with an additional constraint condition, and the Green's function is combined to obtain ground settlement caused by groundwater exploitation by forward modeling; and finally, ground settlement deformation obtained by restoration is removed from ground surface deformation obtained by InSAR technology, and ground surface deformation caused by structure fracture is obtained. The method has guiding significance for disaster formation modes, disaster prevention and disaster reducing of geological disasters in research areas where structure fracture deformation and ground settlement deformation comprehensively appear and generate influences together.

Description

technical field [0001] The invention relates to the technical field of surface deformation monitoring, in particular to a structural fracture and ground subsidence deformation decomposition method based on force source inversion. Background technique [0002] Many areas of the earth are simultaneously affected by multi-source mechanisms of different combinations such as tectonic fractures, magmatic activities, groundwater mining, underground mining, landslides, ground fissures, etc., which manifests as a comprehensive deformation field after multi-source deformation superimposition on the surface, which affects people's personal health. Safety and property security pose a huge threat. The occurrence mechanism of different deformation field information is different, the performance of surface deformation is different, the consequences are different, and the prevention and control measures are also different. Therefore, the reasonable decomposition of the comprehensive deforma...

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Problems solved by technology

When the vast majority of scholars monitor and analyze surface deformation, they ignore the deformation with small impact magnitude but large impact scale, and only consider the deformation caused by a single factor (such as land subsidence, etc.)

The commonly used structural fracture deformation monitoring method is mainly high-precision leveling measurement technology, which is time-consuming and labor-intensive, with limited coverage, and cannot realize large-scale high-precision deformation monitoring

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