Study On Similarity Theory Method For The Comprehensive Analysis To Prediction Parameter And Angular Parameters Of Mining Subsidence

This dissertation discusses the key problems with classification of mining subsidence prediction parameters and angular parameters. Firstly, the mining subsidence engineering problems are generalized as plane strain ones with homogeneous isotropic rock mass of excavation, through which mechanical model of inclined coal seam mining is established. According to the basic mechanics equations and boundary conditions, it deduces the similarity criterions and similarity criterions of mining subsidence by applying analysis method of similarity theory equation, and leads to criterion equation of vertical displacement,horizontal displacement and horizontal deformation on mining subsidence phenomenon. Secondly, following the definition of each prediction parameter and angular parameter, the simplified criterion equation and similar index of that are concluded. Finally, based on the actual materials, 297 national observation stations are divided into four similar phenomenon groups through fuzzy mathematic clustering analysis. The value ranges of the parameters under different groups and kinds are given to build function models in directions of trend, up and diphead with∏criterion equation for each similar phenomenon group's prediction parameters and angular parameters. Taking Kailuan and Xuzhou mining lots as the analysis examples, it puts forward to the adjustment basis for each lot's rock movement parameters, from which the function model based on the similarity theory∏standards is proved reliable and suitable.