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 11. Maximum Slope Angle (Tilt) Change for Planned Red Cliff Mine Longwall
Panels.
Panel Overburden Width/ Smax/ Slope Maximum Slope Predicted Distance
Width Depth Depth Depth (Tilt) or Til t Angle from from
(feet) (feet) Ratio Ratio Multiplier (%) (°) Centerline Ribside
(feet) (feet)
800 200 4.000 0.04455 2.73 12.16 6.93 325 -75
500 1.600 0.01782 2.73 4.86 2.78 325 -75
1000 0.800 0.00749 2.82 2.11 1.21 288 -112
1500 0.533 0.00319 3.27 1.04 0.60 315 -85
2000 0.400 0.00160 3.37 0.54 0.31 412 12
900 200 4.500 0.04455 2.73 12.16 6.93 366 -84
500 1.800 0.01782 2.73 4.86 2.78 366 -84
1000 0.900 0.00787 2.76 2.17 1.24 327 -123
1500 0.600 0.00359 3.12 1.12 0.64 336 -114
2000 0.450 0.00188 3.45 0.65 0.37 400 -50
1000 200 5.000 0.04455 2.73 12.16 6.93 407 -93
500 2.000 0.01782 2.73 4.86 2.78 407 -93
1000 1.000 0.00822 2.75 2.26 1.29 373 -127
1500 0.667 0.00403 2.97 1.20 0.69 363 -137
2000 0.500 0.00218 3.37 0.73 0.42 407 -93
1100 200 5.500 0.04455 2.73 12.16 6.93 447 -103
500 2.200 0.01782 2.73 4.86 2.78 447 -103
1000 1.100 0.00842 2.74 2.31 1.32 416 -134
1500 0.733 0.00439 2.87 1.26 0.72 392 -158
2000 0.550 0.00242 3.24 0.78 0.45 427 -123
1200 200 6.000 0.04455 2.73 12.16 6.93 488 -112
500 2.400 0.01782 2.73 4.86 2.78 488 -112
1000 1.200 0.00855 2.74 2.34 0.45 459 -151
1500 0.800 0.00475 2.82 1.34 0.77 431 -169
2000 0.600 0.00270 3.12 0.84 0.48 448 -152
NOTE: Positive distances are away from the panel centerline and negative distances are toward
the panel centerline.
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