Recognition of limestone water inrush source by Fisher method of trace elements.

Accurate identification of mine water inrush source is the key technology of mine water disaster prevention and control. According to the composition and content of conventional elements in Feicheng coalfield of Ordovician limestone water and the fifth limestone water is very similar, it is difficult to use the water inrush discrimination problem, twenty water samples from two types of aquifers are selected as discriminant samples, and five trace elements F, Br, I, H₃BO₃ and Rn are used as discriminant factors of Fisher method, combined with Baizhuang coal in Feicheng coalfield. The typical discriminant function model of Fisher is established by SPSS software in the case of water inrush from the floor of Mine 9603 working face, and the discriminant result is compared with that of the Piper three-line diagram of the conventional element. The results show that the Fisher discriminant model with trace elements can accurately identify similar water inrush sources, and the method is simple and easy to operate. [ABSTRACT FROM AUTHOR]