Analysis Of Mining Subsidence Of Loess And Damage Evaluation

The geological disaster and environmental damage caused by mining subsidence,which attract more and more people's attention from the academia and engineering.Especially covered by loess in western china where is the key region of coal mining in the new century,which landform is complex,ecological environment is fragile and that belongs to the prone area of nature disasters.It is obvious that the ground failure caused by mining subsidence is more serious.Therefore,the quantitative analysis and evaluation on the mining damage in the mining area of loess,which has important practical significance for security mining coal.This paper chooses Xiagou coal mine which locates in the Binchang mining area in Shaanxi Province as study area.Using the theory of mining subsidence and GIS technology to analyze the surface movement distortion and evaluate the damage grade caused by mining.The main research contents and results are as follows:(1)The analysis of the characteristics and prediction model of mining subsidence of loess based on existing mining settlement estimate software,using C#to develop the functional module which automatically generates the regular grid point coordinate document(format is.txt),then embeds the module into the VS environment.It can predict automatically the subsidence and deformation of mining.(2)Based on ArcGIS 10.1 as the operating system,on the basis of subsidence zone rules grid point is expected to be the surface mobile inflection values to generate TIN model,and combined with the exploitation of damage assessment indicators,then we will show the quantitative analysis and visualization of buildings(structures)damage level in the Two mining subsidence(3)Based on the data of the surface digital elevation model and the predicted results of mining subsidence,analyzed and processed the terrain data through ArcGIS platform,extracted gradient and slope direction to study the variation characteristics of them between before and after mining subsidence.(4)According the damage level of the buildings,railway and roads in the mining subsidence area,we put forward corresponding regulation protection scheme.The results of this study not only provide technical support for the safe coal mining under the XiagouCoal Mine,but also provide technical references for mining subsidence prediction and mining damage analysis in other mining subsidence of loess.