Study On Mine Surface Deformation And Prediction Rule Based On GIS

Because of the characteristics of the geological structure and mining process, studies on mechanism and evolution law of ground movement and deformation have been paid more and more attention,with the grey and complexity of influencing factors of mine surface deformation. Consequently,This study provides an important scientific basis for the safety production of mine,which is evolution of 3D visualization and spatial and temporal information of the surface deformation law,based on prediction of surface deformation and GIS.The variation rule of displacement can get the early warning of regional ground deformation,which we can get by doing some research on observation line observation of each monitoring point,baesd on the field monitoring data of surface. We analyse the horizontal displacement and subsidence of the mobile mechanism.GIS software technology hlep to create subsidence isoline map and profile monitoring point in the surface of 3 different periods and analyse the underground mining and surface subsidence trend relationship.In view of the influence of factors and complex gray surface deformation, we use gray correlation analysis method and calculate the relationship between the influencing factors to get the correlation degree of each factors on surface subsidence.Based on Methods PCA and BP combination forecast, simplifing the complicated factors and preserving the most information of principal components,the ground movement and deformation of the strata movement angle were predicted.The results show that it improve the overall stability of BP neural network prediction of displacement angle of stratum and the accuracy of the prediction effect is higher than BP, the stability of prediction results is better, the range of surface movement in mining area are plotted and provide decision support for the mine surface engineering layout.Three dimensional numerical simulation model of mining area is constructed beased on Gravity stress and tectonic stress.We can get the surface of the vertical displacement by simulating and calculating in two kinds of background.The surface deformation observation line 1# line and 4# line underground mining sequence for typical background, we simulate calculation of underground mining in the process of strata movement and deformation rules.The result is that the simulation results are consistent with the field monitoring. According to the characteristics of the tectonic stress in metal mines and considering the gravity stress and tectonic stress superposition effect,the effect of stress as a factor is lead to the ground movement and deformation prediction model.Based on the existing mining area for prediction of surface deformation,surface monitoring points of each observation line is expected results and field monitoring and numerical simulation are in good agreement.The results of the study show that the study based on prediction of surface deformation law and GIS and using the methods of the field measurement, theoretical analysis and numerical simulation and so on,reveales the evolution mechanism and spatial mining subsidence,provide technical support for safety production in mine and is the great significance to the goal of achieving efficient production of mine.