The chemical features of ground water and FDA model used to distinguish source of water burst in Jiaozuo mine area

Using the Fisher Discrimination Analysis Theory(FDA), and according to the analysis results of the water sample, the authors establish the mathematical recognition model of the source of water burst in the Jiaozuo mining area and do its discriminatory analysis and result verification. Using synthetic water chemical analytical method and the FDA model discriminatory analytical method of the source of water, and analyzing chemical characteristic of groundwater and forming mechanism in the mining area, the authors confirm source of water burst in the water-bearing strata. The research result shows that the result of FDA predicated water bursting source agrees with that of the chemical methods analysis of normal water; Ordovician groundwater recharges limestone in a remarkable way; the connection between sandstone water of the seam roof and deep karst water is weak; the FDA model is very powerful in identifying the source of water burst; by using back substitution estimation method, the error decreases continuously and it is of great applicability, easy to handle. It may offer scientific basis for the countermeasures of mine water burst.