Mining Subsidence Movement And Deformation Prediction And 3D Realization Based On GIS

Coal is one of the main energy sources in our country.With the mining of underground coal and other resources,due to the governance is not in place,resulting in increasingly prominent environmental problems in mining areas,such as farmland,railway damage subsidence collapse,residential housing wall cracking,subsidence or tilt collapse and other problems seriously endanger the safety of the country and people’s life and property.At present,the research on mining subsidence is still to establish monitoring stations on the working surface of the mining area,and study the law of surface movement and deformation through the data obtained from the monitoring stations.Parameters according to the geological and mining conditions,the original digital topographic map,estimated parameters and the observation data mining area as the data source to develop a set of mining subsidence and subsidence basin is expected to 3 d visualized display program,the user can according to the program to study law of mining subsidence and three-dimensional scene intuitive sense and sensibility subsidence basin.Based on the analysis of mining subsidence prediction and visualization research status,it is determined that this paper chooses probability integral method prediction model and uses TIN to build digital elevation model.This paper focuses on the following three aspects:(1)This paper expounds the principle of mining subsidence prediction,introduces the probability integral method prediction model in detail,and summarizes the probability integral method prediction formula and studies the algorithm realization of the probability integral method prediction model.Research 3d visualization technology,master irregular grid TIN generation algorithm,triangular mesh interpolation algorithm,DEM data fusion method and ground object modeling,etc.According to the data structure and characteristics of this paper,choose the method of constructing 3d model.Geographical factors and visual effects need to be considered in the modeling of ground object data.Model coloring is achieved through interface calls to the vertex shader in OpenGL.The data acquisition of digital elevation model and the extraction of topographical data of original mining area by Cass software are introduced in detail.The three-dimensional spatial data extraction of elevation points within the influence range of mining subsidence by Cass software is introduced in detail,and the gross errors are checked and removed from the data.Among them,the ground object data should be extracted hierarchically,and the data format should be converted to facilitate the subsequent processing of the program.(2)in terms of program design and implementation,this article is based on ArcGIS Engine components development technology to achieve the function program,the program is divided into six functional modules,they are read function,data editing,data mining subsidence and deformation calculation,mining subsidence visualization and subsidence area 3 d scene display.NET Framework as the development platform,using C# language to write mining subsidence prediction and 3d visualization program.Among them,C# language is used to write the data reading module and mining subsidence movement deformation calculation function of the program.The calculation of subsidence,tilt,curvature,horizontal movement,horizontal deformation,etc.,the corresponding curve output.Using the component development technology of ArcGIS Engine to realize the mining subsidence visualization function and 3d scene display function of the subsidence area,the isoline map,3d visualization of the subsidence basin and 3D scene map of the subsidence area are respectively drawn for the predicted results in the mining area.(3)taking huainan gu north mine south on a 1 in 13121 coal mining face as an example,according to gu north coal mine 13121 became the first to the conditions in mining parameters and expected to use the program to predict subsidence zone and deformation value,the expected results visualization output for the chart,contour map,3 d figure and subsidence basin subsidence area 3 d scene graph,It is helpful to study and analyze the law of surface deformation and movement.For "three under" coal mining,the mining subsidence prediction and 3D visualization program have certain application value.Figure [51] Table [5] Reference [66]...