2013-09-27_REPORT - C1980007 ‎(4)‎

• Permit No: C1980007
• IBM Index Class Name: REPORT
• Doc Date: 9/27/2013
• Doc Name: Spring 2013 Subsidence Monitoring Report
• From: Wright Water Engineers, Inc
• To: DRMS
• Permit Index Doc Type: Subsidence Report
• Email Name: JRS
• Email Name: DIH
• 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 (Sm), horizontal displacement (S,,),
tilt (M), curvature (C), strain (E), angle of draw (�), 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.