Analysis On The Surface Deformation Law And Subsidence Trend Of The Deep Mining High Ground In Yunjialing Mine

The problem of mining damage induced by coal mining has a long history.In-depth study on the law of surface deformation in mining subsidence,It is of great guiding significance to improve the production efficiency of coal enterprises and promote the construction of ecological civilization and high-quality development in coal mining areas.The thesis takes 12303 working face and 12305 working face in the third mining area of Yunjialing Mine as engineering experimental areas,and lays out surface mobile observation stations.Through the data processing and analysis,the angular parameters that can reflect the characteristics of mine subsidence are obtained,based on threedimensional space According to the theory of surface fitting,the predicted parameters of the surface movement probability integral are obtained.In order to invert the surface subsidence characteristics and subsidence trend of mining at 12307 working face,based on the radar remote sensing image of the 21 st phase C-band coverage of the ESA Sentinel-1A satellite,combined with SRTM(3 ″)DEM data,the dual-track method D-In SAR technology,Through image registration,baseline estimation,interferogram filtering,phase unwrapping,orbital refining and geocoding data processing methods,obtained the surface deformation information of the third mining area of the mine from October 9,2016 to January 8,2018.The research shows that the dual-track D-In SAR technology has good monitoring ability for wide-area and continuous surface deformation,and the differential interferometry technology can analyze the ground subsidence trend of mining face.The main research results obtained in this paper are as follows:(1)Based on the measured data and the drawn surface deformation curve of mining subsidence,the final state subsidence characteristics of subsidence,tilt,curvature,horizontal movement and horizontal deformation of Z observation line and U observation line are analyzed,and the mining area 12303 working face The surface dynamics and the final state deformation law of the 12305 working face mining determine the surface subsidence angle parameters that can reflect the specific geological and mining conditions of the mine.(2)Taking the probability integral as the source type,a three-dimensional surface fitting model was constructed,and the predicted parameters of surface movement and deformation were determined: the sinking coefficient was 0.78,the average value of the horizontal movement coefficient was 0.27,and the main average value of the tangent angle was 1.3.(3)Based on the dual-track method D-In SAR technology,the surface deformation information of the study area from 448 days in October 9,2016 to January 8,2018 was obtained.The cumulative subsidence of the surface was 523 mm,and the average subsidence rate was 1.167 mm / d,sinking basins are continuously distributed and have a wide distribution range.The main results of this study are as follows.