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Material Keys <br /> 1:Overburdeand Graveln(c:150 0:22 <br /> I I I I I I I I <br /> (c:0 0:35g:131)g:12)5) <br /> 6:2:Sand Clay(c:150 0:22 g:131) <br /> 4700 — — <br /> 50 ft ) w <br /> 4680 — `1' — <br /> 0 <br /> 1 <br /> 4660 — <br /> 4640 ` — — — — — _ -_._,_-- — — — — — — <br /> 4620 — <br /> Analysis 1 <br /> 4600 — — Multiple Stability Analysis <br /> Method: Spencer-Wright <br /> Surface: Circular <br /> I I I I I I Results <br /> 140 160 180 200 220 240 260 280 Critical Factor of Safety: 2.77 <br /> GALENA Version 7.2 Licensed to:J&T Consulting Interslice Force(Final)Angle: 10.4 0 <br /> Edited. 29 Apr 2020 <br /> Project Derr Pit Technical Revision 4 Processed: 29 Apr 2020 <br /> East Grading <br /> File: C:\Galena Models\Derr East Grading.gmf u; Sal('onsullini,enc. <br />