2011-09-23_REPORT - C1980007 ‎(8)‎

• Permit No: C1980007
• IBM Index Class Name: REPORT
• Doc Date: 9/23/2011
• Doc Name: Spring 2011 Subsidence Report - Appendix A Thru C ‎(Part 2 of 3)‎
• From: Wright Water Engineers, Inc
• To: DRMS
• Permit Index Doc Type: Subsidence Report
• Email Name: TAK
• Media Type: D
• Archive: No

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CRITICAL WIDTH
Figure B. Diagram showing subsidence profile and parameters for a mining panel of critical
width. The parameters are maximum vertical displacement (S.), horizontal displacement (Sh),
tilt (M), curvature (C), strain (E), angle of draw (4)), break angle (B), radius (r), and angle of
major influence ((3). Critical width is the mining width necessary for maximum vertical
displacement (S to occur.