2012-02-28_REVISION - M1980244 ‎(87)‎

• Permit No: M1980244
• IBM Index Class Name: REVISION
• Doc Date: 2/28/2012
• Doc Name: VOL 3. Appendix 6: Geotechnical Slope Design Recommendations
• From: CRIPPLE CREEK & VICTOR GOLD MINING COMPANY
• To: DRMS
• Type & Sequence: AM10
• Email Name: TC1
• Media Type: D
• Archive: No

TABLE OF CONTENTS (continued)
5.1.5 Catch -Bench Reliability 5 -5
5.1.6 Catch -Bench Design 5 -6
5.2 BACKBREAK ANALYSIS PARAMETERS 5 -6
5.2.1 Joint Orientations, Spacings, and Lengths 5 -6
5.2.2 Probability of Occurrence 5 -7
5.2.3 Joint Strength Parameters 5 -7
5.2.4 Design Sets 5 -7
5.3 BACKBREAK ANALYSIS CONSIDERATIONS 5 -8
5.3.1 Triple Versus Double Benching 5 -8
5.3.2 Theoretical vs. Predicted Bench Face Angles 5 -8
5.3.3 Double- and Triple -Bench Offsets 5 -9
5.4 DISCUSSION OF BACKBREAK RESULTS 5 -9
5.4.1 Sectors One through Eight 5 -9
5.4.2 Sectors Nine through Twenty-Seven 5 -9
5.4.3 Upside Potential 5 -10
6.0 INTERRAMP ANALYSIS 6 -1
6.1 INTERRAMP DESIGN SECTORS 6 -2
6.2 INTERRAMP ANALYSIS 6 -2
6.2.1 Major Geologic Structure Database 6 -2
6.2.2 Input Parameters 6 -3
6.3 PLANE -SHEAR FAILURE AND WEDGE FAILURE GEOMETRIES 6-4
6.3.1 Evaluation of Plane -Shear Failure Geometries 6 -4
6.3.2 Evaluation of Wedge Failure Geometries 6 -4
6.4 INTERRAMP RESULTS 6-4
7.0 OVERALL ANALYSIS 7 -1
7.1 DISCUSSION OF OVERALL STABILITY 7 -1
7.2 SLOPE/W LIMIT - EQUILIBRIUM ANALYSIS 7 -1
7.2.1 Material Properties 7 -2
7.2.2 Hydrology 7 -2
7.2.3 Selection of Cross Sections for Analysis 7 -2
7.2.4 RQD Modeling and Lithology 7 -3
7.2.5 2011 Geotechnical Drilling 7 -3
7.3 OVERALL STABILITY ANALYSIS RESULTS 7 -3
7.3.1 Section Cres -1 7 -4
7.3.2 Section Cres -2 7 -4
7.3.3 Section Cres -3 7 -4
7.3.4 Section GH -1 7 -4
7.3.5 Section GH -2 7 -5
7.3.6 Section GH -3 7 -5