Abstract: Taking the V# orebody of a certain copper mine as an example, some related numerical simulation research on the structure parameters of the stop by multifactor orthogonal design method is done, and obtains some indexes such as displacement, stress and plastic zone distribution. The multi-target fuzzy weight values is got, and the stability of stope evaluation can be caried out by the displacement and stress indictors so as to determine some reasonable structure parameters of the stope. This research achievement has important reference value on the similar mine problems and the problems of multifactor, multilevel, multiindex and pay a guiding role of mine safety production.

Key words: The structure parameters of stope, Numerical simulation, Orthogonal design, Multiindex, Fuzzy weight values