2014-05-02_REPORT - M1974004

• Permit No: M1974004
• IBM Index Class Name: REPORT
• Doc Date: 5/2/2014
• Doc Name: Stability analysis of spec agg quarry
• From: Martin Marietta Materials
• To: DRMS
• Email Name: PSH
• Media Type: D
• Archive: No

Martin Marietta Materials
Spec -Agg 2014 Annual Report
STRUCTURAL GEOLOGY EVALUATION
SPECIFICATIONS AGGREGATE QUARRY
GOLDEN, COLORADO
TABLE OF CONTENTS
1.0 INTRODUCTION ................................................................................................ ..............................1
2.0 PURPOSE AND SCOPE OF WORK ................................................................ ............................... 2
3.0 LOCATION AND GEOLOGIC SETTING ......................................................... ............................... 3
4.0 MINING PLAN AND PROGRESS .................................................................... ............................... 5
5.0 FIELD OBSERVATIONS ................................................................................... ..............................6
6.0 ANALYSIS OF STRUCTURAL DISCONTINUITIES ........................................ ............................... 8
6.1 Evaluation of Discontinuity Measurements .......................................... ............................... 8
6.2 Slope Geometry ................................................................................... ............................... 9
6.3 Friction Angle ..................................................................................... ............................... 10
6.4 Kinematic Analysis ............................................................................... .............................10
6.4.1 Potential Failure Modes ........................................................ ............................... 11
6.4.2 East Walls ............................................................................. ............................... 12
6.4.3 Northern Walls ...................................................................... ............................... 12
6.4.4 West Walls ............................................................................ ............................... 14
6.4.5 Southern Walls ...................................................................... ............................... 14
7.0 CONCLUSIONS AND RECOMMENDATIONS ................................................ .............................16
8.0 REFERENCES.............. ..................................................................................... .............................17
March 31, 2014 Page ii Lachel & Associates, Inc.
Project 13364013 00 02014 All Rights Reserved