Visualization Of Mining-Subsidence Data Base On Open GIS

With underground coal resources mined, the balance between ecological environment of the mining area, buildings and structures was damaged. If mining-subsidence data can be used reasonably and fully, it will provide technic gist for prevention and cure of mining subsidence in future.After analyzing a lot of mutuality technic data, Open GIS is decided to be introduced to the visualization program of mining-subsidence data. It can reduce expense of program which used by the coal-mine company largely. Open GIS item is chosed according to the basic function, expand function, IDE and licences. Finally SharpMap and NTS are chosed, beacase it can fully exert the advantage of GIS on spatial information management and largely impove efficiency of damage estimate in mining-subsidence.A C#-based method is introduced to produce isoline maps for coal mining induced surface movement and deformation such as subsidence, incline, curvature, horizontal movement, and horizontal deformation. Then the profile line between any two points in an affected area can be derived, and mining subsidence data can be visually presented. Considering damage effect of building in level deformation, the comprehendsive level deformation is introduced. The program also can inquiry attribute data through graphic data. Furthermore, basic spatial analyse is realized, too. Based on the damage gradation criteria for the buildings above a mining area set by the State Bureau of Coal Industry, impacts of underground coal mining on buildings and their degree can be evaluated, and also attribute statistics table can be shown.The paper using GIS and mining-subsidence data, can evaluate the impacts of underground coal mining on buildings and their degree in time, truly, impersonally and equitably. The result of this research can provide scientific gist for government and coal-mine companies to deal with dissension in village beacase of buildings'damage.