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REV06840
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REV06840
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Entry Properties
Last modified
8/25/2016 1:07:50 AM
Creation date
11/21/2007 9:37:15 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1980007
IBM Index Class Name
Revision
Doc Date
11/30/1995
Doc Name
FACTOR OF SAFETY SUMMATION FOR THE PARKING LOT EXTENSION AT THE WEST ELK MINE
From
HARDING LAWSON ASSOCIATES
To
MTN COAL CO
Type & Sequence
MR174
Media Type
D
Archive
No
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1 <br />1 PIEZOMETRIC SURFACE(S) HAVE BEEN SPECIFIED <br />Unit Weight of Water = 62.40 <br />Piezometric Surface No. 1 Specified by 4 Coordinate Points <br />Point X-Water Y-Water <br />No. (ft) (ft) <br />1 86.00 90.00 <br />2 120.00 111.00 <br />3 130.00 114.00 <br />4 206.00 115.00 <br />1 <br />A Critical Failure Surface Searching Method, Using A Random <br />Technique For Generating Circular Surfaces, Has Been Specified. <br />100 Trial Surfaces Have Been Generated. <br />10 Surfaces Initiate From Each Of 10 Points Equally Spaced <br />Along The Ground Surface Between X = 100.00 ft. <br />and X = 130.00 ft. <br />Each Surface Terminates Between X = 140.00 ft. <br />and X = 180.00 ft. <br />Unless Further Limitations Were Imposed, The Minimum Elevation <br />At Which A Surface Extends Is Y = 90.00 ft. <br />10.00 ft. Line Segments Define Each Trial Failure Surface. <br />1 <br />Following Are Displayed The Ten Most Critical Of The Trial <br />Failure Surfaces Examined. They Are Ordered - Most Critical <br />First. <br />* * Safety Factors Are Calculated By The Modified Bishop Method <br />Failure Surface Specified By 9 Coordinate Points <br />Point X-Surf Y-Surf <br />
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