2023-08-31_ENFORCEMENT - M1982121 ‎(8)‎

• Permit No: M1982121
• IBM Index Class Name: Enforcement
• Doc Date: 8/31/2023
• Doc Name Note: Appendix G - Active Stabilization Design
• Doc Name: Rock Failure Analysis and Stability Report
• From: RMR Aggregates, Inc.
• To: DRMS
• Email Name: ACY
• Email Name: THM
• Media Type: D
• Archive: No

Job No. 123116-000 Page
Client RMR Aggregates, Inc. Date 8/10/2023
Project Mid Continent Mine Designed By KRF
Subject Active Slope Stabilization Checked By AC
Technical Summary
Scope
Preliminary design of active stabilization of the west face of the Mid Continent Mine utilizing tensioned
tiebacks. Anchored slope design was performed for upper limestone thicknesses of 5 feet.
Design References
• Rock Slope Engineering 4th edition,Wyllie and Mah,2005
• Fn DC35.1-14,Recommendations for prestressed rock and soil anchors,2014.
Design Assumptions
1. Rock parameters were assumed from aback analysis of the west wall ground disturbance
performed in RocPlane.
2. Existing west face slope angles were determined from a slope angle heat map from onXmaps.