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PERMFILE58943
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PERMFILE58943
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Last modified
8/24/2016 11:01:15 PM
Creation date
11/20/2007 6:04:16 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1994082
IBM Index Class Name
Permit File
Doc Date
12/11/2001
Doc Name
HAUL ROAD D STABILITY ANALYSIS YOAST MINE
Section_Exhibit Name
TAB 13 ATTACHMENT 13-16
Media Type
D
Archive
No
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100 trial surfaces will be generated and analyzed. <br />10 Surfaces initiate from each of 10 points equally spaced <br />along the ground surface between x = 135.0 ft <br />and x = 170.0 ft <br />Each surface terminates between x = 200.0 ft <br />and x = 322.0 ft <br />Unless further limitations were imposed, the minimum elevation <br />at which a surface extends is y = .0 ft <br />5.0 ft line segments define each trial failure surface. <br />ANGULAR RESTRICTIONS <br />The first segment of each failure surface will be inclined <br />within the angular range defined by <br />Lower angular limit :_ -45.0 degrees <br />Upper angular limit :_ (slope angle - 5.0) degrees <br />• <br />-- WARNING -- WARNING -- WARNING -- WARNING -- (# 48) <br />Negative effective stresses were calculated at the base of a slice. <br />This warning is usually reported for cases where slices have low self <br />weight and a relatively high "c" shear strength parameter. In such <br />cases, this effect can only be eliminated by reducing the "c" value. <br />USER SELECTED option to maintain strength greater than zero <br />Factors of safety have been calculated by the <br />* * * * * SIMPLIFIED BISHOP METHOD <br />. The most critical circular failure surface <br />is specified by 30 coordinate points <br />Point x-surf y-surf <br />No. (ft) (ft) <br />
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