DBPapers

SLOPE STABILITY ANALYSIS OF GOL-E-GOHAR IRON MINE OF IRAN BY USING NUMERICAL METHODS

AUTHOR/S: K. SHAHRIAR, J. GHOLAMNEJAD, F. SAMIMI NAMIN
Sunday 1 August 2010 by Libadmin2007

7th International Scientific Conference - SGEM2007, www.sgem.org, SGEM2007 Conference Proceedings/ ISBN: 954-918181-2, June 11-15, 2007

ABSTRACT

The Gol-E-Gohar (GEG) Iron ore Complex is located in Kerman province of
Iran, and is situated on the Sanandaj-Sirjan metamorphic belt, which has been
played a large part in the history of the tectonics of Iran plate margin. Based
on the modern exploration activities, six magnetic anomalies in this district
have been recognized. Now a large-scale open-pit mine is being developed on
this deposit. This paper aims to re-evaluate the pre-designed slope angles of
Anomaly 1 of GEG Open pit. In the preliminary design the overall slope angle
is set to 35 and 45 degrees in soil and rock respectively. In order to update the
geological model of open pit and for determination of geological and mechanical
properties of rock mass, geotechnical mapping was performed. After obtaining
the updated vertical and horizontal planes of open pit, the stability of slopes
was investigated using numerical methods (FLAC Code). Results showed that
depending on the rock type, the safe slope angles in GEG pit are between 32
to 60 degrees. Also numerical analysis indicates that slope drainage can lead
to increasing the slope angles from 22 to 38 degrees in some parts of pit. This
eliminates the stripping of about 50 million tones of overburden and waste.

Keywords: open pit mine, slope stability, overall slope angle, slope drainage.