Abstract
Article presents a method of determination of an approximation parameters of average graphs of mining terrain curvatures caused by an exploitation of the 338/2 hard coal seam in the Upper Silesian Coal Basin in Poland. Approximation by the use of the higher orders polynomials has been done. An order of polynomial and a number of its segments belong to the parameters of approximation. Both values on the basis of minimization of a variability coefficient of random dispersion of observed curvatures have been determined. Parameters of approximation for the average graphs of curvatures measured after the end of an operation of one, two, three and four longwalls in the 338/2 seam have been calculated.
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