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Fly rock is one of the reluctant phenomenon in blasting operation. Several factors are effective in producing fly rock. As a whole, these factors can be divided into two groups; controllable parameters (blasting pattern) and uncontrollable parameters (geo-mechanical characteristics). One of the most important controllable parameters in blasting operation is blast hole diameter. Proper diameter is the diameter which is optimum from technical and economical point of view. Normally, statistical methods can be used fo...

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 ...