QUANTITATIVE CLASSIFICATION METHODS IN THE HYDROGEOLOGICAL TYPE OF COAL MINE: FISHER METHOD BASED ON PRIMARY FACTOR

In order to study the hydrogeological quantitative classification, 49 producing mines in 7 major coal producing Provinces were collected in North China. The Fisher method based on primary factor was proposed to establish discriminant model of hydrogeological classification. With degree to which the aquifers and water bodies damaged or affected by mining (A(1)), the distribution of goaf water in the mine and its surroundings (A(2)), normal water inflow (Q(1)), maximum water inflow (Q(2)), water inrush (Q(3)), influence degree of water hazard on mining (A(3)), and difficulty in water prevention and control (A(4)), seven indicators as independent variables, Fisher discriminant function based on primary factor was established to classify the hydrogeological types. The results show that the accuracy of the Fisher method based on primary factor is 98%, which demonstrates that the new method applies to accurate hydrogeological quantitative classification.