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\Telephone Line.gmf
Processed: 18 Apr 2011 09:14:58
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 profiles)
-----------------
Profile: 1 (2 points) Material beneath: 1 - Overburden
-50.00 4688.00 100.00 4688.00
Profile: 2 (2 points) Material beneath: 2 Sand and Gravel
-50.00 4682.50 100.00 4682.50
Profile: 3 (2 points) Material beneath: 3 - Residual Bedrock
-50.00 4650.50 100.00 4650.50
Profile: 4 (2 points) Material beneath: 4 Claystone Bedrock
-50.00 4648.00 100.00 4648.00
Slope Surface (8 points)
-------------
-50.00 4688.00 56.00 4688.00 56.50 4650.50
65.00 4650.50 65.50 4648.50
67.50 4648.50 68.00 4650.50 80.00 4650.50
Phreatic Surface (13 points)
----------------
-50.00 4679.00 -39.00 4679.00 -32.00 4678.00
-26.00 4678.50 -14.00 4677.00
-8.00 4676.50 -5.00 4676.00 12.00 4673.50 24.00 4671.00 38.00 4663.00
56.50 4655.50 56.50 4650.50 80.00 4650.50
Failure Surface
---------------
Circular surface defined by: XL,XR,R
Intersects: XL: -24.00 YL: 4688.00 XR: 67.20 YR: 4648.50
Centre: XC: 57.24 YC: 4750.55 Radius: R:
-
---- 102.53
-------------------------------------------
--
--------------------------------------------------------------------------
RESULTS: Analysis 1 - M-2011-001 Stability Analysis
Bishop Simplified Method of Analysis - Circular Failure Surface
---------------------------------------------------------------
Factor of Safety: 1.37
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 (42 slices)
Slice X-S ---- --------------- Base ----- --------------- PoreWater Normal Test
X-Left Area Angle Width Length Matl Cohesion Phi Weight Force Stress Factor
1 -24.00 1.82 50.9 1.72 2.73 1 150.00 28.0 207.96 0.00 -9.26 1.07
2 -22.28 5.47 50.9 1.72 2.73 1 150.00 28.0 623.89 0.00 154.28 1.07
3 -20.56 5.57 47.8 1.14 1.71 1 150.00 28.0 635.25 0.00 304.19 1.04
4 -19.41 17.37 47.8 2.52 3.76 2 0.00 37.0 2036.81 0.00 502.99 0.93
5 -16.89 26.16 44.8 2.72 3.83 2 0.00 37.0 3161.54 0.00 753.53 0.91
6 -14.17 13.40 44.8 1.16 1.63 2 0.00 37.0 1640.14 53.10 926.80 0.91
-13.01 26.57 41.7 2.04 2.73 2 0 00 37.9 3^71 2? '•1' 93 1117.06 0.10
8 -10.98 30.27 41.7 2.04 2.73 2 0.00 37.0 3755.59 599.74 1309.46 0.90
9 -8.94 15.15 38.7 0.94 1.20 2 0.00 37.0 1886.79 351.21 1485.51 0.89
10 -8.00 53.15 38.7 3.00 3.84 2 0.00 37.0 6645.36 1431.33 1652.51 0.89
11 -5.00 47.14 36.1 2.38 2.95 2 0.00 37.0 5919.01 1401.53 1911.72 0.88
12 -2.62 51.21 35.6 2.38 2.93 2 0.00 37.0 6447.14 1641.89 2101.29 0.88
13 -0.24 53.13 32.6 2.30 2.73 2 0.00 37.0 6703.95 1742.17 2322.90 0.88
14 2.06 56.51 32.6 2.30 2.73 2 0.00 37.0 7143.68 1935.27 2482.59 0.88
15 4.36 61.69 29.5 2.38 2.73 2 0.00 37.0 7811.12 2116.36 2691.96 0.88
16 6.74 64.89 29.5 2.38 2.73 2 0.00 37.0 8226.73 2286.22 2840.17 0.88
17 9.12 82.81 26.5 2.88 3.22 2 0.00 37.0 10510.80 2900.49 3054.53 0.88
18 12,00 59.94 26.5 2.00 2.24 2 0,00 37.0 7615.97 2125.50 31.89.48 0.88
19 14.00 77.57 23.4 2.51 2.73 2 0.00 37.0 9863.79 2690.43 3370.15 0.88