عنوان مقاله [English]
Slope stability studies is one of the most considerable parameter of safety and economical factors of open pits.
Because the pit walls usually consist of different characteristics of lithology and structure, using only one slope for all walls is not enough and reasonable.
So they need carefull geological and geotechnical studies to determine the geotechnical limits of the pit.
By using MRMR methods, SlopeW 2004 and FLAC 4.0 softwares and comparing the results,optimum slopes for North western wall of Chadormalu Iron mine have been calculated.
On the basis of all available data,the following geotechnical domains have been distinguished for North western wall of Chadormalu Iron mine:
• Lithology and Structure
• Pit Wall Orientation
• Rock Mass Rating and conditions
North western open pit wall is bounded by metasomatite, albite metasomatite, and ore. The structure of this domain is distinguished by steep normal faults with great displacement and brecciate limestone.The results of geotechnical boreholes, modeling and studies indicate that the overall slope of this domain could be increased from 52, to 60 degrees.