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PERMFILE40335
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PERMFILE40335
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Last modified
8/24/2016 10:43:18 PM
Creation date
11/20/2007 10:17:11 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1981022
IBM Index Class Name
Permit File
Doc Date
1/27/2003
Doc Name
Predicted D Seam Longwall Subsidence Report 2/26/03
Section_Exhibit Name
Exhibit 2.05-E8 Part 6
Media Type
D
Archive
No
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Elk Creek Mine Subsidence Page 39 <br />February 26, 2003 <br />Figure 13. Predicted low-extraction room-and-pillar subsidence <br />(Abel 5 Lee, 1984). <br />Subsidence(%)=1.39+5.57 ~L„] <br />~ r2=0.919 Syx=2.98% <br />r2=Correlation Coefficient Squared <br />Sy,~=Standard En-or(7 based an x <br />30 <br />L <br />•~ <br />25 <br /> <br />. <br />r L <br />c <br />`c <br />~ <br />20 <br />O <br />~ <br />0 • <br /> l5 <br /> • <br />LEGEND <br /> L,,,~=~ D=Depth(m) <br />~' IO • • R =Extraction Ratio <br /> W=Pillar Width(m) ' <br /> 5 • <br />K=0.0226 MP0/m <br /> H=Mining Height(en) <br /> <br /> 00 I.0 20 30 4D 50 60 <br /> LmmdH/YJl , <br /> Subsidence over super-critical room-and-pillar <br /> workings following pillar failure. ~ , <br /> ~' <br /> -39- <br />L <br />
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