Research On Mning Subsidence Law Of Zhangshuanglou Mine Based On D-InSAR And Numerical Simulation

During the coal mining process,the surface structures of the mining area will be damaged to varying degrees due to the influence of surface subsidence deformation.It is very important to obtain the expected parameters of surface subsidence in the mining area for the prediction of surface movement subsidence caused by mining in the mining area.According to the expected results,the damage of the surface structures and structures in the mining area will be analyzed to ensure the safety of mining.This thesis focuses on the Zhangshuanglou mining area in Xuzhou City,Jiangsu Province.Use the D-InSAR technology to monitor the surface of the mining area.UDEC was used to study the movement law of surface subsidence.Probability integration method is used to predict the impact of subsequent mining on railways in mining areas.The following are major works we completed :(1)According to the measured data of the railway sinking in the Zhangshuanglou mining area from October to December 2018,the sinking values obtained from the sentinel data processed by D-InSAR technology are compared and analyzed,and the D-InSAR technology is applied to the surface settlement of the Zhangshuanglou mining area.Monitoring has a certain degree of reliability.(2)The D-InSAR technology is used to process the coherent data of the sentinel,and the sinking values from August 2016 to May 2017 and from October 2017 to April 2018 are dynamically estimated.From the surface to the surface subsidence caused by mining from October to October,the surface dynamic settlement curve caused by the mining of the complete 74101 working face was obtained by superposition,which provided a basis for studying the subsidence law of 74101 surface mining.(3)According to the sinking data obtained by the combination of D-InSAR technique and probability integral method,the dynamic law of the sinking,tilting and curvature curves of the 74101 face and the main section are studied,and the corresponding dynamic parameters of surface movement are obtained.A total of 6 observation lines finally sink the curve,and the whole basin is used to obtain the parameters.The prediction parameters of the probability integral method in this area are obtained,and the parameters and expected sinking values of the prediction are continuously corrected.The final surface subsidence prediction parameters are obtained through the cycle.(4)Using UDEC to carry out numerical simulation research on deep inclined coal seam mining,the mining subsidence law under the geological conditions of this area and the mining subsidence law under repeated mining conditions were obtained,and the relationship between subsidence rate and mining degree was studied.A series of relationships between sinking rate and aspect ratio.(5)According to the estimated parameters of the surface mining subsidence obtained,the surface subsidence deformation caused by the subsequent mining face is expected.According to the relationship between the railway and the working face,the focus is on the sinking of the railway,the inclination of the direction,and the horizontal movement value,and provide guidance for the coal mining technology under the railway.It provides a scientific basis for the safe operation of the railway.