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REV04523
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REV04523
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Entry Properties
Last modified
8/25/2016 1:02:41 AM
Creation date
11/21/2007 9:18:26 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1980007
IBM Index Class Name
Revision
Doc Date
11/21/1996
Doc Name
SYLVESTER GULCH STABILITY ANALYSIS FOR RECLAMATION
From
GOLDER ASSOCIATES
To
MOUNTAIN COAL CO
Type & Sequence
PR7
Media Type
D
Archive
No
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* * * * * DEFAULT SEGMENT LENGTH SELECTED BY XSTABL * * * <br />33.0 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 degreesr <br />Upper angular limit :_ (slope angle -'S.0) degrees <br />-- WARNING -- WARNING -- WARNING -- WARNING -- (# 48) <br />*****+*****+*+*******a*+************************************************ <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 />************************************************************************ <br />------------------------------------------------------------ <br />USER SELECTED option to maintain strength greater than zero <br />------------------------------------------------------------ <br />Factors of safety have been calculated by the <br />* * * * * SIMPLIFIED BISHOP METHOD * * * * * <br />The most critical circular failure surface <br />is specified by 19 coordinate points <br />Point x-surf y-surf <br />No. (ft} (ft) <br />1 380.00 6810.91 <br />2 412.41 6817.14 <br />3 444.51 6824.79 <br />4 476.24 6833.85 <br />5 507.54 6844.30 <br />6 538.35 6856.12 <br />7 568.61 6869.28 <br />8 598.27 6883.76 <br />9 627.25 6899.54 <br />10 655.51 6915.58 <br />11 683.00 6934.84 <br />12 709.65 6954.30 <br />13 735.42 6974.92 <br />
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