Research on coal mine surface deformation monitoring based on InSAR
To further explore more details of the surface deformation of coal mines,taking the surface deformation problem caused by coalfield in Shuangyashan mining area as a research case,synthetic aperture radar interferometry(InSAR)technology was applied to conduct research.Based on InSAR,the original image of coal mine surface deformation monitoring was obtained.By interpreting and pro-cessing the original image,the distribution of settlement in the study area,the relationship between settlement and mining distance,and the relationship between settlement and time were obtained.Combined with on-site measurement methods,the accuracy of InSAR based coal mine surface deformation monitoring was compared and tested.The results showed that test results for the data correlation analysis of the 58 nodes on the section line,when the significant level was taken as 0.05,the minimum correlation coefficient was 0.256;when the significant level was taken as 0.01,the minimum correlation coefficient was 0.330.After checking the table and comparison,there is a good correlation between the profile leveling measurement values and InSAR measurement values.Prove that there was no significant difference between the leveling measurement values and InSAR measurement values.If the leveling results represent the real situation of ground settlement,the In SAR monitoring value can reflect the overall settlement in the study area.Therefore,it is proved that the coal surface deformation monitoring method based on InSAR is accurate and has certain application value.
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