Research Of Mining Damage Prediction And Analysis System In Loess Covered Mine

The ground subsidence problems caused by coal mining have got more and more attention, especially for the mining areas covered by loess, where the topography is complex as well as the surface is covered with thick loess. Traditional prediction model based on probability integral can’t be perfectly applied to the loess areas for the subsidence regularity’s particularity. As a result, it has vital significance to develop an effective system for predicting the exploiting damage for these areas with special geological condition.This paper discussed the prediction methods of mining subsidence under different geological conditions after studying the conventional mining subsidence approaches as well as the loess mining areas’ prediction model based on the two-layer medium theory. Furthermore, combination mining subsidence theory with soil mechanics, this paper deduced the horizontal tensile deformation threshold generated by surface cracks and the prediction formulas of the depth of mining fissures. Then, based on the above theoretical research, this paper developed a system for mining damage prediction and analysis under the VS 2010 development platform with C# language, making the mining subsidence prediction and subsidence damage analysis automatic and visual. This system could predict and generate two dimensional curve of each movement deformation, contour map, and three dimension simulation map of mobile subsidence basin, analyze the surface mining damage and predict the scope of exploitation fracture. Besides, this system could be applied to the analysis and prediction of loess covered areas. This paper conducted experimental study combined with the system feature. First, the author deprived the moving deformation parameters from the measured data, then studied each moving deformation value of the surface as well as its distribution in the developed system of mining subsidence prediction and damage analysis, discussed the mining extent of coalface through experiments and simulated three-dimensional effects of mobile sink basin. Furthermore, this paper automatically generated the crack distribution range with the system of crack analysis function. The experimental research not only verified the correctness of the fracture theory and the practicality of the developed system, but also provided an example of actual project for the mining subsidence in loess areas and offered a reference to other related researchers and project implementers.