Abstract: In this peper, a local stuctural trap is regarded as a grey system. The best trap to a certain standard is detetmined ccrding to the various evaluation factors. The grey corelation degrees between the best trap and the othersare calculated through grey corelation analysis. After queuing and clssifiation of the traps according to their greycorrelation degrees, the key exploration targets are determined and the opimized exploration decision is then made,thusthe exploration risk is minimized. pilication of this method to some real examples has shown encouraging results.

Key words: ttap evaluation, trap queuing, grey system, grey correlation, the Alshan structural belt