The structural strength of the coke produced may be predicted on the basis of the coefficients V-PM, K-GL, K-P, K-SC, which, in turn, are calculated from measurements of A(d), V-daf, and y in coal and of A(d), V-daf, and Ss in plastometric semicoke. If the coke yield (K-co) is taken into account, those coefficients may be used to determine the coking capacity (K-cc) of the coal and to predict the structural strength of the coke body (K-ssc) produced from that coal. On the basis of K-ssc, coking coal may be divided into two categories: coke-forming coal; and filler.