The Application Of InSAR Technology In Deformation Monitoring In Mining Area

There is no denying fact that China is a country with abundant coal resources.However,underground coal resources have been explored excessively in recent years,which attributes to land subsidence phenomena.And it also triggers a bad effect on local land resources,ecological environment,and daily life.For the purpose of minimizing or avoid the impact of subsidence disaster,the ground subsidence investigating and monitoring are demanded.It would be very meaningful for exploring coal mining resources and preventing coal mine subsidence disaster as long as applying modern surveying and mapping technology to extensive ground surface deformation monitoring.In this paper,according to the characteristics of coal mining area,such as wide distribution,large subsidence gradient and long period,the recognition and detection of surface subsidence in mining area is realized based on time-series InSAR technology.Taking Juye Coal Mine as an example,the detection and recognition of large-scale surface deformation in mining area based on stacking InSAR technology and SBAS InSAR technology are carried out.In addition,combined with ipta technology and sbas-insar technology to monitor the surface deformation of Yangquan mining area,the complete surface subsidence information of Yangquan mining area is obtained.The main contents of this paper and the conclusions are as follows:(1)The basic principle of the InSAR technique outlined the basic principle of InSAR and time-series InSAR technique and technological process for the traditional method of D-InSAR limiting factors,analyzed two kinds of widely used InSAR technique.(2)Juye mining area,deformation detection and identification based on the mining deformation magnitude big subsidence area production cycle is long,etc.,using the data from the coverage of Juye coal mine 24 sentry scene the Stacking-InSAR technology and SBAS-InSAR technology,a wide range of surface deformation detecting successfully identified seven ground subsidence area,and the two methods of detecting results analysis of mutual authentication,found that have a high correlation,proves the reliability of the results.(3)In Yangquan mining area of mining area in the study of the surface deformation,obtained in July 2015 to March 2019,85 C band Sentinel-1 a scene between the image data,the IPTA technology and SBAS-InSAR technology to obtain the average Yangquan mining area of the surface deformation rate and deformation time series,analysis and comparison of two kinds of results on the spatial distribution and deformation magnitude has high consistency,verify the reliability of the results.(4)Compared with the surface deformation information of Yangquan mining area obtained by the technology of small baseline set from February 2007 to October 2010 and from July 2015 to March 2019,the results show that the settlement center and the maximum settlement level have changed,four new settlement areas and eight old settlement areas have disappeared.