2011-04-19_PERMIT FILE - M2011001

• Permit No: M2011001
• IBM Index Class Name: PERMIT FILE
• Doc Date: 4/19/2011
• Doc Name: Adequacy Review- Stability Analysis Exhibit
• From: DRMS
• To: Lafarge West, Inc.
• Email Name: PSH
• Email Name: AJW
• Media Type: D
• Archive: No

Galena 5.02 Analysis Results
Licensee: Office of Surface Mining
Project: Lafarge - Iverson Mine
File: D:\Documents and Settings\PSH\My Documents\My Projects\ZZ Stability Analysis - Galena\Iverson\Fence.gmf
Processed: 19 Apr 2011 09:55:19
DATA: Analysis 1 - M-2011-001 Stability Analysis
Material Properties (4 materials)
-------------------
Material: 1 (Mohr-Coulomb Isotropic) Overburden
Cohesion Phi UnitWeight Ru
150.00 28.0 114.00 1.10
Material: 2 (Mohr-Coulomb Isotropic) Sand and Gravel
Cohesion Phi UnitWeight Ru
0.00 37.0 130.00 1.10
Material: 3 (Mohr-Coulomb Isotropic) - Residual Bedrock
Cohesion Phi UnitWeight Ru
0.00 14.0 124.00 0.00
Material: 4 (Mohr-Coulomb Isotropic) Claystone Bedrock
Cohesion Phi UnitWeight Ru
500.00 22.0 124.00 0.00
Water Properties
----------------
Unit weight of water: 62.430 Unit weight of water/medium above ground: 62.430
Material Profiles (4 p
-----------------
Profile: 1 (2 points)
-50.00 4688.00
Profile: 2 (2 points)
-50.00 4682.50
Profile: 3 (2 points)
-50.00 4650.50
Profile: 4 (2 points)
-50.00 4648.00
rofiles)
Material beneath: 1 Overburden
100.00 4688.00
Material beneath: 2 - Sand and Gravel
100.00 4682.50
Material beneath: 3 Residual Bedrock
100.00 4650.50
Material beneath: 4 Claystone Bedrock
100.00 4648.00
Slope Surface (8 points)
-------------
-50.00 4688.00 56.00 4688.00
67.50 4648.50 68.00 4650.50
Phreatic Surface (13 points)
----------------
-50.00 4681.00 -38.00 4681.00
-8.00 4677.00 2.00 4675.00
56.50 4654.00 56.50 4650.50
Failure Surface
---------------
Circular surface defined by: XL,XR,R
Intersects: XL: 16.00 YL: 4688.00
Centre: XC: 60.11 YC: 4692.33
56.50 4650.50 65.00 4650.50
100.00 4650.50
-30.00 4680.00 -27.00 4680.50
12.00 4671.00 24.00 4666.00
80.00 4650.50
XR: 66.66 YR: 4648.50
Radius: R: 44.32
RESULTS: Analysis 1 - M-2011-001 Stability Analysis
Bishop Simplified Method of Analysis - Circular Failure Surface
---------------------------------------------------------------
Factor of Safety: 1.03
65.50 4648.50
-20.00 4678.00
37.00 4661.00
Negative normal stresses exist on the base of one or more slices - examine slice data and consult the Galena Users, Guide
Slice Geometry and Properties (45 slices)
Slice X-S ------------------- Base -------------------- PoreWater Normal Test
X-Left Area Angle Width Length Matl Cohesion Phi Weight Force Stress Factor
1 16.00 0.99 81.9 0.53 3.78 1 150.00 28.0 113.03 0.00 -175.71 1.53
2 16.53 1.87 77.1 0.40 1.80 1 150.00 28.0 212.73 0.00 -33.35 1.37
3 16.93 2.86 77.1 0.44 1.98 2 0.00 37.0 333.35 0.00 179.50 1.07
4 17.38 10.68 72.2 1.16 3.78 2 0.00 37.0 1287.00 0.00 338.88 1.00
5 18.53 18.65 67.3 1.46 3.78 2 0.00 37.0 2295.87 0.00 571.36 0.94
6 19.99 13.45 62.4 0.88 1.89 2 0.00 37.0 1671.35 0.00 794.01 0.90
7 110.3, 14.92 62.4 0-31 -1.31, 0.00 37.0 1862.15 0.C0 334.21 0.90
8 21.75 18.95 57.5 1.02 1.89 2 0.00 37.0 2374.60 0.00 1086.74 0.87
9 22.76 20.57 57.5 1.02 1.89 2 0.00 37.0 2585.10 0.00 1183.08 0.87
10 23.78 20.22 52.6 0.93 1.54 2 0.00 37.0 2545.94 0.00 1392.03 0.84
11 24.71 31.56 52.6 1.36 2.24 2 0.00 37.0 3983.25 88.16 1511.01 0.84
12 26.07 31.48 47.7 1.27 1.89 2 0.00 37.0 3980.70 202.19 1780.42 0.82
13 27.35 33.26 47.7 1.27 1.89 2 0.00 37.0 4211.97 309.65 1906.18 0.82
14 28.62 38.12 42.8 1.39 1.89 2 0.00 37.0 4833.26 407.63 2162.60 0.81
15 30.00 39.90 42.8 1.39 1.89 2 0.00 37.0 5064.86 496.37 2281.05 0.81
16 31.39 44.73 38.0 1.49 1.89 2 0.00 37.0 5683.72 575.53 2536.09 0.81
17 32.88 46.46 37.9 1.49 1.89 2 0.00 37.0 5909.01 644.99 2645.97 0.81
18 34.37 42.29 33.1 1.31 1.57 2 0100 37.0 5382.06 581.06 2891.42 0.81
19 35.69 43.41 33.0 1.31 1.57 2 0.00 37.0 5528.15 615.18 2974.18 0.81