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2001-12-11_PERMIT FILE - C1980007A (2)
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2001-12-11_PERMIT FILE - C1980007A (2)
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Last modified
12/17/2018 7:22:05 AM
Creation date
11/20/2007 3:12:21 PM
Metadata
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Template:
DRMS Permit Index
Permit No
C1980007A
IBM Index Class Name
Permit File
Doc Date
12/11/2001
Doc Name
By TOC Deleted
Section_Exhibit Name
Exhibit 40 Geotechnical Analysis B & F Seams
Media Type
D
Archive
Yes
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April 1989 <br />TABLE 3.4.A.26 <br />MAXIMUM EXTENT OF 1.0 SAFETY FACTOR ABOVE SEAMS (ft) <br /> <br /> <br /> Cave Condition <br /> B E E <br />Seam *1 **2 *1 **2 *1 **2 Comment <br />AREA II <br />B 350 40 N/A N/A N/A N/A Single- <br />seam mining <br />B and E *** <br />N/A 45 220 65 N/A N/A B caved <br />E 80 ft <br />offset <br />B, E, acid F N/A 55 tl/A 60 160 t!/A B and E caved <br />F 40 ft offset <br />AREA III <br />B 335 45 N/A N/A N/A N/A Single- <br />seam mining <br />B and E t!/A 50 190 50 N/A N/A B caved <br />E 100 ft <br />offset <br />B, E, and F Dl/A 60 I•i/A 45 135 N/A B and E caved <br />F 40 ft offset <br />AREP. I V <br />B 375 35 N/A tl/A N/A N/A Single- <br />seam mining <br />B and f~, i`i/A 70 270 45 N/A N/A E 60 ft offset <br />lB,E, and-F N/A 30 N/A 30 220 N/A ! F 20 ft offset <br />AREA V <br />E 365 30 N/A N/A Single- <br />seam mining <br />E and F 110 N/A 285 N/A E caved <br />F 50 ft offset <br />*1 - Mined (no cave) **2 = Cood cave (long-term) <br />*** = Plot analyzed <br />• <br />
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