2011-02-14_PERMIT FILE - C1980007A ‎(3)‎

• Permit No: C1980007A
• IBM Index Class Name: Permit File
• Doc Date: 2/14/2011
• Doc Name: SUBSIDENCE EVALUATION
• Section_Exhibit Name: Exhibit 60E Subsidence Evaluation for the South of Divide and Dry Fork Mining Areas
• Media Type: D
• Archive: Yes

•
0
4
Q
0
a
t
CRITICAL WIDTH
Figure 3. Diagram showing subsidence profile and parameters for a mining panel of critical
width. The parameters are maximum vertical displacement (S n ), horizontal displacement (S tilt
(M), curvature (C), strain (E), angle of draw (�), break angle (B), radius (r), and angle of major
influence (R).
0
Sm (� /A