2014-08-19_PERMIT FILE - C1980007 ‎(10)‎

• Permit No: C1980007
• IBM Index Class Name: Permit File
• Doc Date: 8/19/2014
• Doc Name: Haul Road Geotechnical Design Method
• Section_Exhibit Name: Exhibit 82 Appendix H
• Media Type: D
• Archive: No

1.10
Mountain Coal Company RPE East HR -1: Seepage & Stability Analysis
ESSA, Colluvium Fully Softened Shear Strength, Static (no suction)
6.55 File Name: RPE Haul_ Road_ Stability_ FinalSurvey.gsz Name: Shale
Model: Shear/Normal Fn.
Last Saved Date: 5/10/2012 Unit Weight. 142.5 pcf
6.50 Factor of Safety: 1.10 Name: Colluvium (FS) (no suction) Unit Wt. Above Water Table: 135 pcf
Model Mohr -Coulomb Strength Function: Shale (Halfway: F
6.45
6.40 Name: Carbonaceous Shale
Model: Shear/Normal Fn.
6.35 Unit Weight: 142.5 pcf
Unit Wt. Above Water Table: 135 pcf
Strength Function: Shale (FS, Lab)
6.30
6.25
�p 6.20
C)
T_
6.05
W
6.00
5.95
5.90
5.85
5.80
5.75
5.70
0.26
Name: Coal
Model: Mohr -Coulomb
Unit Weight. 85 pcf
Unit Wt. Above Water Table: 82.4 pcf
Cohesion: 5000 psf
Phi: 30 °
Unit Weight: 135.4 pcf
Unit Wt. Above Water Table: 130 pcf
Cohesion: 394 psf -
Phi: 23.9 °
Name: Drainage Blanket
Model: Mohr -Coulomb
Unit Weight: 120 pcf
Cohesion: 0 psf
Phi: 30 °
7.5 gpm/50' = 3.342e-004 cfs/ft
Figure 9
6.55
6.50
6.45
6.40
6.35
Haul -------------------------------- ------- -------------- 6.30
Road ___
J--------------------------6.25
Name: Sandstone
Model. Bedrock (Impenetrable)
0.36 0.46 0.56 0.66 0.76 0.86 0.96 1.06 1.16
Horizontal Distance (ft) (x 1000)
6.20
6.15 C
C
6.10
6.05
6.00
5.95
5.90
5.85
5.80
95.75
5.70
1.26 1.36 1.46 1.56 1.66 1.76