Monitoring and Analysis of Surface Deformation in Baode Mining Area Based on SABS-InSAR
Coal mining is the leading industry in Baode County.The long-term and high-intensity exploitation of mineral resources has led to different degrees of suface deformation and frequent geological disasters in the mining area,which has caused great safety risks to further mining operations and destroyed the local ecological environment.In order to further explore the spatio-temporal distribution and driving factors of surface deformation in the mining area,the SBAS-InSAR technology was used to process 32 Sentinel-1A image data covering the research area,and the surface deformation information during 2020-06-24-2022-09-13 in Baode mining area was obtained.During the monitoring period,the research area was dominated by subsidence,forming multiple funnel-shaped subsidence areas that developed from the center to the periphery.The shape variables in the main deformation area had a roughly linear relationship with time.According to the calculated deformation results,Baode mining area was divided into six key research areas.Taking Tai'an Coal Mine in the No.5 key research area as an example,the following conclusions was gotton by analyzing the mining engineering of its working face.The surface of the coal mine has not reached a stable state.The area of surface deformation coincided with the spatial distribution of the working face.As the main driving factor of deformation in mining area,with the advancement of mining engineering,the proportion and the deformation rate of the main deformation area will be further increased.The geological structure and stratigraphic lithology play a important role in controlling the trend and range of the overall deformation in the study area.The relative movement of the hanging wall and footwall on both sides of the fault and the thickness difference of the compressible layer on the surface of different regions both have a impact on the deformation rate of the ground.By superimposing and comparing the cumulative shape variables and regional precipitation information of key monitoring points,it is concluded that there is a certain correlation between surface deformation and precipitation in the study area,and the influence on the surface deformation of underground mining and open-pit mining is different.
万方数据
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