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PERMFILE45400
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PERMFILE45400
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Last modified
8/24/2016 10:47:46 PM
Creation date
11/20/2007 12:20:32 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1981022
IBM Index Class Name
Permit File
Doc Date
12/11/2001
Doc Name
PREDICTED D SEAM LONGWALL SUBSIDENCE /ELK CREEK MINE ABEL 1998
From
Old Exhibit 2.05-E2 Part 6
Section_Exhibit Name
Exhibit 2.05-E8 Part 4
Media Type
D
Archive
No
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"D" Seam Longwall Subsidence Page 90 August 17, 1998 <br />Figure 5. Prediction of supercritical room-and-pillar subsidence <br />(Abel & Lee, I989). <br />70 <br /> <br />10 <br />60 <br />.-. <br />L <br />50 <br />v~ <br />c <br />c <br />~ 40 <br />0 <br />~ 30 <br />v <br />w <br />N 20 <br />v)~ <br />00 20 40 60 80 100 <br />Lm~(H/vJ~ <br />Subsidence over super-critical room-and-pillar <br />workings following pillar failure. <br /> <br /> <br /> <br /> <br /> Su bsid ence(%)=+8.469+11.95 to ~L~„,~(~ <br />2 <br /> r <br />=0.949 Syx=4.77% <br />Lam= K R D=Depth (m) <br />R =Extraction Ratio <br /> <br />• H =Mining Height (m ) <br />W =Pillar Width (m) <br />K = 0.0226""P9'm <br /> <br />ao <br />
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