Method for inverting underground goaf position parameters by fusing InSAR and PSO

Abstract

The invention discloses a method for inverting underground goaf position parameters by fusing InSAR and PSO, which is suitable for the field of mineral geological monitoring and protection. The methodcomprises steps of utilizing an InSAR method to obtain ground surface deformation of the mining area radar sight line, determining a value range of goaf parameters, initializing the position and speed information of each individual in the particle swarm, substituting the position coordinates of the particle swarm into a probability integral model to obtain vertical subsidence and east-west and north-south horizontal movement of the earth surface, and converting deformation into LOS-direction deformation according to radar imaging geometry, substituting the converted LOS directional surface deformation and the LOS directional surface deformation calculated by the InSAR into a fitness function to calculate a fitness value, and obtaining and recording an optimal solution of each particle anda globally optimal solution of a group, and solving a fitness value corresponding to the optimal solution of the population in iteration. The method is easy to operate, the effect of inverting the position parameters of the underground goaf is good, technical support can be provided for illegal mining of underground coal resources and inversion of the position of a coal fire area, and meanwhile the application space of the InSAR technology is expanded.

Description

technical field [0001] The invention relates to a method for retrieving location parameters of underground goafs, in particular to a method for retrieving location parameters of underground goafs by integrating InSAR and PSO, which is suitable for mining subsidence monitoring in mining areas, and belongs to the field of geographic monitoring. [0002] technical background [0003] Our country has a vast territory and has various natural resources, among which coal resources are the energy that our country mainly relies on now. Because of this, in many areas of our country there are cases of illegal mining of coal resources. On the one hand, this causes a waste of national resources and damages state-owned assets; The safety of life and property of mines can also be caused, and it will also cause mine geological environmental disasters such as aquifer damage, landslides, surface subsidence, and damage to buildings and structures. Therefore, in order to standardize the behavio...

AI Technical Summary

Problems solved by technology

Manual inspections are time-consuming and laborious, lack specific investigation locations, and cannot achieve real-time monitoring

The implementation of geophysical prospecting technology is complex and expensive, and the detection area is too small, the flexibility is not enough, the efficiency is low, and the detection accuracy is low when the mining depth is large

InSAR technology has the advantages of all-weather, all-time, wide coverage, low cost, and high precision. Applying this technology to mining monitoring in mining areas can reduce monitoring costs. Due to its large coverage, it can achieve large-scale monitoring and improve It improves the regulatory efficiency, but this technology can only obtain the surface subsidence, and it is difficult to obtain the location parameters of underground mining

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