2008-01-16_APPLICATION CORRESPONDENCE - C2008086 ‎(3)‎

• Permit No: C2008086
• IBM Index Class Name: Application Correspondence
• Doc Date: 1/16/2008
• Doc Name: Preliminary Draft Environmental Impact Statement/Subsidence
• Media Type: D
• Archive: No

DRAFT
Table 8. Maximum Vertical Subsidence (Smax) for Planned Red Cliff Mine Longwall Panels.
Panel Overburden Width/ Supercritical, Smax/m Smax Distance, from Panel
Width Depth Depth Critical or Subsidence Centerline Ribside
feet feet Ratio Subcritical Factor from to from to
(meters) (meters) (feet) Panel (feet) (feet) (feet)
800 200 4.000 Supercritical 0.810 0 [phone]
(243.8) (61.0) (8.91)
500 1.600 Supercritical 0.810 0 [phone]
(152.4) (8.91)
1000 0.800 Subcritical 0.681 0 0 -400 -400
(304.8) (7.49)
1500 0.533 Subcritical 0.435 0 0 -400 -400
(457.2) (4.79)
2000 0.400 Subcritical 0.292 0 0 -400 -400
(609.6) (3.21)
900 200 4.500 Supercritical 0.810 0 [phone]
(274.3) (61.0) (8.91)
500 1.800 Supercritical 0.810 0 [phone]
(152.4) (8.91)
1000 0.716 Subcritical 0.716 0 0 -450 -450
(304.8) (7.87)
1500 0.600 Subcritical 0.490 0 0 -450 -450
(457.2) (5.39)
2000 0.450 Subcritical 0.342 0 0 -450 -450
(609.6) (3.76)
1000 200 5.000 Supercritical 0.810 0 [phone]
(304.8) (61.0) (8.91)
500 2.000 Supercritical 0.810 0 [phone]
(152.4) (8.91)
1000 1.000 Subcritical 0.747 0 0 -500 -500
(304.8) (8.22)
1500 0.667 Subcritical 0.549 0 0 -500 -500
(457.2) (6.04)
2000 0.500 Subcritical 0.396 0 0 -500 -500
(609.6) (4.36)
1100 200 5.500 Supercritical 0.810 0 [phone]
(335.8) (61.0) (8.91)
500 2.200 Supercritical 0.810 0 [phone]
(152.4) (8.91)
1000 1.100 Subcritical 0.765 0 0 -500 -500
(304.8) (8.42)
1500 0.667 Subcritical 0.598 0 0 -500 -500
(457.2) (6.58)
2000 0.500 Subcritical 0.550 0 0 -500 -500
(609.6) (4.85)
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