Multiple Attribute Decision Making (MADM) method is applied to select tailings site

of the Gol-e-Gohar Iron Ore Processing Plant in the Kerman province, south-eastern

Iran. To select tailings site, screening is applied on eight locations proposed by Binnie

and Granges .Consequently three sites identified for further studies. Evaluation factors

include only the most important factors such as efficiency ratio, elevation and distance

to processing facilities, occurrence of faults and fractures. Crisp values such as efficiency

ratio, elevation and distance can be determined by measurements and calculations,

but some factors such as occurrence of faults and fractures are presented as linguistic

values that can be described with triangular fuzzy numbers. Based on evaluation values

obtained an optimal tailings site can be selected using a modified Technique of ranking

Preferences by Similarity to the Ideal Solution (TOPSIS) given crisp data and linguistic

variables as the alternatives of attributes. Each attribute’s weight is assigned

using the analytic hierarchy process. The final ranking order aids in the selection of tailings

site. Finally, the stages of modified TOPSIS method were applied and site no.2

situated at 5400m distance to the mill was selected as the best alternative.