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In this paper, the process state of electrical energy consumption in conditions of indeterminacy and insufficiency of information with the applying of data-compression methods such as Karhunen-Loeve expansion (KLE) and Principle Component Analysis (PCA) was appraised. As the result, the mathematical model of electric energy consumption process was introduced. This model was developed using statistical classification when nonuniform operating mode of electric loads. The mathematical model, which was obtained, allows considering parameters (factors) of mine production team and others, which have an impact on electro-energy intensity of production. [ABSTRACT FROM AUTHOR]