Laserfiche WebLink
<br />• In the stability analyses, it was assumed that the slopes of the <br />existing piles have been flattened to a recommended 2 (H) 1 (V). If <br />Cotter's management decides to postpone flattening the existing piles to <br />the flatter angle, safety factors will be slightly different.. It can be <br />expected, however, that they will still remain within an acceptable range. <br />The future waste pile expansion analyses were prepared under the <br />assumption that one or more intermediate terraces will not be constructed <br />on the waste piles. The analyses show that such terraces are not required <br />for stability purposes. The mine management may decide, however, to in- <br />corporate such terraces into the future pile configurations. The terraces <br />enable easier access to the slopes for future reclamation purposes. It <br />is strongly recommended that one or more such terraces be included on <br />the outslopes of the future waste piles. <br />4.5 Reclaimed Configurations <br />• As it was discussed in a previous section of this report, future <br />configurations of the waste piles were recommended in such a way that no <br />changes of slopes will be required for the reclamation of the waste piles. <br />Slopes of 2 (H) 1 (V) were recommended for future configurations and are <br />considered acceptable for the reclaimed configurations as well. For this <br />reason, the results of the stability analyses of future configurations <br />are directly applicable to the reclaimed configurations. <br />It was also shown that including one or several terraces on the <br />outslopes of the piles will be beneficial. We again recommend this <br />consideration. <br />As it was also mentioned, reclamation will require flattening of <br />all existing slopes that are steeper than 2 (H) 1 (V). Su~:h flattening <br />could be performed either at present, during the future operation of the <br />mine, or just for the reclamation purposes. <br /> <br />_ 25 _ <br />