SELECTION OF OPTIMUMSUPPORTSYSTEM FOR ACCESS TUNNELS IN GOOSHFILL MINE BY USINGELECTRE METHOD

In underground mining, the selection of support system for mine tunnel development plays a significant role in safety and economics of operations. Traditionally, support selection is based upon the experience of the design engineer, the validity of this selection is questionable. In this paper, a new approach for selecting the optimum tunnel support system based on ELECTRE I approach is proposed. In this new approach, the selection of the tunnel support system is considered as a multi criteria decision-making problem. Firstly, by using the numerical Method, based on technical and stability parameters of the tunnel, different support systems are specified. Therefore UDEC software has been employed and in order to obtain the results realistically, great attention has been paid to determine the geomechanical parameters of the rock mass in site. In modeling studies,8 different models were constituted and the solution of these models were carried out by using UDEC. These models are(Table 1):