Deformation Monitoring Of A Drilling Water-Soluble Mining Area Based On Time Series InSAR

In order to study the process and trend of surface deformation and settlement funnel generation in the mining of water-soluble mining mines,acquire the law of subsidence development,InSAR technology was used to perform long-term dynamic monitoring of subsidence areas in mining areas.The paper combined the surface deformation characteristics of drilling water-soluble mines,selected Sentinel-1A radar interferometric data,and invoked SRTM DEM to analyze the application of D-InSAR technology and short baseline set(SBAS-InSAR)technology for surface settlement monitoring of drilling water-soluble mines.The main research were as follows:(1)The 12 scenes from 12 November 2016 to 5 April 2017 in a drilling water-soluble mining area were selected.On the SAR Scape software platform,selected Goldstein filter and used the Delaunay MCF to unwrap the interferogram to obtain the D-InSAR monitoring surface deformation map in the mining area.(2)Based on the superposition analysis of D-InSAR results,mine boundary maps,and orthophoto maps of the mining area,four distinct settlement centers were overlayed.Through the vertical section lines,the timing sequence of the center settlement funnel was analyzed.with the D-InSAR deformation data and level monitoring data compared,the accuracy of D-InSAR monitoring was evaluated.(3)Based on the Small Baseline Set(SBAS-InSAR)technology,the surface SAR image data of 12 above was selected,the linear model was used to invert the settlement rate,the best residual terrain was analyzed by wavelet,and the noise was filtered by the atmospheric filter to generate the 11-phase time series cumulative settlement map and settlement rate map.(4)According to the surface deformation rate map of drilling water-soluble mines generated by SBAS-InSAR,it was found that there is a relatively rapid settlement center in the southern part of the mining area;8 high-coherent points in the evenly distributed mining area were selected to analyze the cumulative settlement data and find the surface subsidence the overall linear law in drilling water-soluble mines.The results showed that The D-InSAR technology was used to monitor the water-soluble mines for drilling to meet the three-dimensional,rapid and short-cycle monitoring requirements;SBAS-InSAR monitoring met the high-precision monitoring needs of water-soluble mines;the formation process of water-soluble mine surface subsidence funnel approximated the Gaussian dynamic distribution of Gaussian curve,indicating that the water-soluble mine can use the random medium theory integration method to predict surface movement and deformation.