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■■NewFields <br /> Perspective.Vision. Solutions. <br /> TECHNICAL MEMORANDUM <br /> 9400 Station Street <br /> Suite 300 <br /> Lone Tree,CO 80124 <br /> T:720.508.3300 <br /> F:720.508.3339 <br /> To: Newmont Mining Corporation <br /> From: NewFields Mining Design &Technical Services <br /> Project: CC&V High Grade Mill Complex <br /> Project No: 475.0106.015 <br /> Subject: Concentrate Stockpile Stability Analysis <br /> Date: 8 March 2017 <br /> ......................................................................................................................................................................................................................................... <br /> 1.0 BACKGROUND <br /> NewFields Companies (NewFields) was commissioned by Newmont Mining Corporation <br /> (Newmont) to evaluate global stability based on the proposed site grading and building for the <br /> concentrate structure and stockpile loading area at the High Grade Mill complex at the Cripple <br /> Creek & Victor Gold Mine (CC&V). The stability evaluation included both static and seismic <br /> conditions and utilized existing data to define the properties of fill and foundation materials. <br /> Recommendations for the fill materials are presented. <br /> 2.0 STABILITY ANALYSIS <br /> Stability analyses were performed using the computer program SLIDE 7 developed by <br /> Rocscience (2016). SLIDE is a two-dimensional slope stability program for evaluating circular or <br /> noncircular failure surfaces in soil or rock slopes using limit equilibrium methods. Spencer's <br /> method of slices was utilized within the stability model and assumes all interslice forces are <br /> parallel and have the same inclination. The factor of safety can be defined generally as the <br /> resisting forces along a potential failure plane divided by the gravitational and dynamic driving <br /> forces, therefore factors of safety in excess of unity indicate stability and those less than unity <br /> indicate instability. Both static and seismic conditions were analyzed. <br /> To assess the stability of slopes during seismic loadings, a pseudostatic approach was utilized in <br /> which the potential slide mass is subjected to an additional, destabilizing horizontal force which <br /> represents the effect of earthquake motions and is related to the peak ground acceleration <br /> (PGA). Very simply, the seismic force is the weight of the slide mass multiplied by a horizontal <br /> pseudostatic earthquake coefficient (kH). Previous analyses have utilized a PGA of 0.14g for the <br />