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PERMFILE139235
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PERMFILE139235
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Last modified
8/24/2016 10:40:01 PM
Creation date
11/26/2007 8:27:15 AM
Metadata
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Template:
DRMS Permit Index
Permit No
C1981033
IBM Index Class Name
Permit File
Doc Date
4/6/1986
Section_Exhibit Name
INTERACTION OF SUBSIDENCE & LANDSLIDING
Media Type
D
Archive
No
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well as initial and final surface elevations are computed. <br />• However, due to the steep and highly irregular topography on this <br /> particular site, final surface elevations ar e of little value. <br />Therefore, all subsidence analyses have been depicted in terms of <br />subsidence magnitude. <br />7.3 RESULTS OF ANALYSIS <br />7.3.1 Subsidence <br />The results from each of the subsidence analyses are shown as <br />contour maps in Figures 3, 11 and 19. Each shows a very similar <br />pattern with maximum subsidence occurring in the northernmost <br />mine panels where the overburden thickness is the least and the <br />panel width is the greatest. This is consistent with what is <br />• expected according to general theory. Maximum subsidence ranged <br />from 5.9 to 6.4 feet in the northern panels. Subsidence along <br />the southern panels ranged from 1 foot to 5 foot. Selected <br />subsidence profiles are shown following each subsidence contour <br />map . <br />Figures 7, 15 and 23 show the patterns of tensile strain <br />resulting on the surface. These again show a very similar <br />pattern. Profiles showing the tension and compression zones are <br />shown following each. <br />7.3.2 Curvature/Tension-Compression <br />Of particular interest with regard to the interaction of <br />• subsidence and stability is the development of tensile strain <br />18 <br />
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