Abstract: In order to scientifically evaluate and select the stope structural parameters of upward hori⁃ zontal layered filling method，the index system of stope structural parameters optimization is constructed by selecting the terminal displacement of stope top，stope production capacity，mining-cutting ratio and min⁃ ing cost per ton of ore. The optimization index information of sample stopes is counted，and the multi-ob⁃ jective optimization of stope structural parameters is carried out by using the fuzzy optimization method. The optimal value of the optimal membership degree of stope structural parameters is obtained by solving the minimum sum of squares of the superior and inferior distances as the objective function. By comparing the membership values of each stope，the stope structure parameters with the best comprehensive effect are obtained. The example shows that this method can optimize the stope structure parameters，and can be used to guide the design of stope structure parameters in mines.

Key words: stope structure parameters, multi-objective optimization, fuzzy optimum