Abstract
In this paper, in view of the scope of coal mining subsidence, the magnitude of subsidence deformation and the impact on buildings (structures), InSAR technology is selected for monitoring, time series analysis method combined with D-InSAR method for processing, and Sentinel- 1 Satellite IW data and RADARSAT-2 satellite XF data have been monitored for four years in the mining-affected area and its surrounding areas. The results show that there are obvious subsidence ranges on the surface of the current mining area and the unstable settlement area. The Shen District has been in a stable state in recent years, and the time sequence analysis for more than 3 years has verified the high accuracy and reliability of the monitoring results. The analysis of the monitoring results shows that the InSAR technology can be used for mining subsidence monitoring, especially when determining the subsidence boundary and whether it is stable or not, it has its technical superiority.
Highlights
The surface of coal mining produces subsidence and deformation
The advantages of InSAR technology applied to deformation monitoring are as follows: the analysis of the monitoring dimension and deformation law of traditional monitoring methods stays at the "point line" level, which can not realize regional monitoring, while InSAR can improve the mining surface deformation monitoring from the "point line" level to the "area" level.Traditional monitoring methods can not ensure the acquisition of deformation information in the key deformation period, while InSAR can extract the deformation information of the previous surface affected by mining using historical data, so as to trace the past deformation; the surface deformation characteristics obtained by traditional monitoring methods are not really "the same state"
4.1.1 Differential InSAR (D-InSAR) results based on RADARSAT-2 data
Summary
The scope, degree of influence, development trend and deformation law of mining subsidence are the current research hotspots in the industry. The application of technology such as total station robots, laser scanners [2,3], and drones [4,5], especially the development and application of technologies such as remote sensing and InSAR [6,7,8,9,10], it provides a new method for obtaining three-dimensional data information of mining subsidence. This paper applies InSAR technology and adopts time series processing methods to monitor the building group and its surrounding area at the boundary of the mining-affected area, and analyze in detail to determine whether the building group is located in the subsidence deformation area and the degree of influence, and solve the local government and villagers, concerns with scientific methods Security issues. While implementing InSAR monitoring, leveling of the monitoring area was carried out, which can be compared and analyzed to verify the accuracy and reliability of the results
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