2008-03-21_PERMIT FILE - C1980007A ‎(8)‎

• Permit No: C1980007A
• IBM Index Class Name: Permit File
• Doc Date: 3/21/2008
• Section_Exhibit Name: Exhibit 60E Subsidence Evaluation for the South of Divide & Dry Fork Mining Areas
• Media Type: D
• Archive: Yes

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CRUICAL WEDTH
Figure 3. Diagram showing subsidence profile and parameters for a mining panel of critical
width. The parameters are maximum vertical displacement (Sm), horizontal displacement (Sh),
tilt (M), curvature (C), strain (E), angle of draw (?); break angle (B), radius (r), and angle of
major influence ((3).
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