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PERMFILE104696
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PERMFILE104696
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Last modified
8/24/2016 9:57:51 PM
Creation date
11/24/2007 11:27:27 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1981022
IBM Index Class Name
Permit File
Doc Date
12/11/2001
Doc Name
PREDICTED LONGWALL SUBSIDENCE FOR THE SANBORN CREEK MINE ABEL 1997
From
Old Exhibit 2.05-E2 Part 4
Section_Exhibit Name
Exhibit 2.05-E8 Part 3
Media Type
D
Archive
No
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• <br />1: <br />i.' <br />i.J <br />~~ <br />~. <br />,- <br />f. <br /> <br />Sanborn Creek Subsidence Page 30 September 2, 1997 <br />Figure 7. Prediction of supercritical room-and-pillar subsidence <br />(Abel ~ Lee, 1989). <br />70 <br />60 <br />.-. <br />L <br />= 50 <br />G_ <br />C_ <br />~ 40 <br />0 <br />° <br />~ 30 <br />a~ <br />20 <br />IC <br />0 <br /> <br /> <br /> <br /> • <br />• Su bsid ence(%)=+8.469+11.951n~L~(~ <br />2 <br /> r <br />=0.949 Syx=.4.77% <br />L,~= K R D=Depth (m) <br />R =Extraction Ratio <br /> <br />• H =Mining Height (m <br />W =Pillar Width (m) <br />K = 0.0226MP°/m <br /> <br />n 2 0 40 6 0 8 0 IOC <br />r)~ <br />Lm~(H/11V1 <br />Subsidence over super-critical room-and-pillar <br />workings following pillar failure. <br />30 <br />
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