Technical Report for the Maricunga Gold Mine - Kinross Gold

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Kinross Gold CorporationMaricunga Mine Technical Reportwith azimuth and elevation. The software enables the user to specify the bench face angleand berm width for a given sector of the pit. The slope sectors specified by Golder had twoazimuths, a “from” and a “to” (i.e. from 70 o ENE to 120 o ESE). In Vulcan, these werespecified transition azimuths for each slope sector. Vulcan also inserts access rampsegments based on the design parameters and the location specified by the user.The following sections provide design details for each of the pit designs completed for thisstudy.East Verde Ultimate Pit DesignDue to the complex nature of the geology in the East Verde pit area a number of differentslope sectors had to be used for completing the original pit design. The sloperecommendations provided by Golder in 2003 formed the basis of that design.Since then, mining experience and geotechnical reviews allowed to modify slightly theangles. The most recent work was completed by A. Karzulovic and Ass. Ltda of Santiago inApril 2007. Figure 17-3 shows the pit geometry adopted in the yearend 2007 design.Figure 17-2: Interramp angles for Verde Pit DesignN 6953300ir= 50ºαir= 38ºαN 6952900α ir = 48ºα ir = 53º ir= 46ºαir= 53ºα ir = 51º αN 6953100N 6952700N 6952500E 469900E 470100E 470300E 470500E 470700E 470900E 471100E 471300E 47150094
Kinross Gold CorporationMaricunga Mine Technical ReportWest Verde Ultimate Pit DesignSlight adjustments to the interramp angles were made following the most recentgeotechnical review completed in April 2007. An angle of 53 degrees is now used in theVerde Breccia compared to 51 degrees in the original design. In the porphyry material anangle of 53 degrees is also used in the design which corresponds to an increase of 3degrees relative to the original design.Figure 17-3: Verde Pit Design Phase 4 with Topography17.10.2 PanchoThe Pancho pit was designed using the same criteria as that used during the 2003 feasibilitystudy. Golder had recommended two slope design criterion and the appropriate rosetteswere established in Vulcan. The first rosette controlled the slope design from the pit bottomup to the 4300 elevation where the rock mass was generally considered more competent.Inter-ramp angles varied from 44.5 to 49 degrees in the region southeast to the southwest.95
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Technical Report for the Maricunga Gold Mine - Kinross Gold

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