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PERMFILE128342
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PERMFILE128342
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Entry Properties
Last modified
8/24/2016 10:25:28 PM
Creation date
11/25/2007 5:59:43 PM
Metadata
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Template:
DRMS Permit Index
Permit No
M1988112
IBM Index Class Name
Permit File
Doc Date
11/8/1988
Section_Exhibit Name
EXHIBIT D MINE PLAN
Media Type
D
Archive
No
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<br />on Figure D.7.5-1. The stability of the heap section was <br />modeled by using a sliding wedge analysis which utilizes force <br />equilibrium techniques. <br />The cross section was evaluated fully loaded with the <br />estimated full stacking height of 100 ft of ore. The pad base <br />' slope was modeled as a three percent slope single lined with <br />60-mil HDPE. A phreatic surface was assumed to exist one ft <br />above the lined surface throughout the length of the cross <br />section. <br />The potential for seismic activity in the vicinity of <br />the project site is addressed in Section D.1 of this report. <br />For the model evaluated, a pseudostatic acceleration <br />coefficient of 0.08 g was used in the stability model. This <br />' short-term coefficient has been selected for use in evaluation <br />of heap leach stability, as the heap sideslopes must stand only <br />for the operating life of the facility. Following leaching and <br />' detoxification of the heap, the sideslopes will be flattened <br />as part of the reclamation program. With the flattened <br />sideslopes, the reclaimed facility is anticipates to be even <br />more stable than the operating heaps. <br />It is anticipated that the heap ore will be stacked at <br />the angle of repose, appro;:imately 1.5H:1V, with subsequent <br />lifts stepped back to provide a 2H:1V overall sl~~pe. <br />1 D.7.5.2 Material Prooerties <br /> The material property parameters used in tha evaluation <br /> were based on laboratory test results, fi eld data, and <br />1 correlations <br />d i obtained from the engineering <br />ti <br />D <br />7 <br />Th <br />h <br />t <br />th literature, as <br />f th <br />h <br />d <br /> discusse <br />n Sec <br />. <br />.2. <br />e s <br />ear s <br />reng <br />on o <br />e crus <br />e <br /> ore/synthetic liner interface was estimated using data <br /> presented by Martin et al (1984). A summary of the parameters <br /> is presented on Figure D.7.5-1. <br /> <br /> D-53 <br />
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