2014-08-19_PERMIT FILE - C1980007 ‎(4)‎

• Permit No: C1980007
• IBM Index Class Name: Permit File
• Doc Date: 8/19/2014
• Doc Name: Laboratory Test Data
• Section_Exhibit Name: Exhibit 82 Appendix B
• Media Type: D
• Archive: No

Direct Shear Test Job No.: 7112
ASTM: D3080
Project: West Elk Mine PR -2 Conveyor and Prep Plant - # 06261004
Boring No.: SB09-11 Sample No. Depth: 7.5-9.5 Test Date: 8/27/2009
Location: Sample Type: SS Date Reported: 1 9/2/2009
Soil Type: Mixture of Coal and Mineral Soil Shear Rate
0.00315 (in/min)
Remarks: Specimen reconstituted to given density at as received moisture content using -#10 material;
Inundated after applying normal load; Allowed to consolidate 1 hour.; Sheared to given displacements at constant Liquid Limit:
rate of 0.00315"/min..
Plastic Limit:
Plasticity Index:
SDecific Gravity: 1.66
0
-5
t -10
U
c
0
o -15
o_
N
N
CD
Y -20
U
H
S -25
m
c
R
V -30
-35
-40
0
2.5
2
0.1 0.2 0.3
Failure Criterion:
Max Shear Stress
Initial
X
I
Diameter (In.1 2.50 2.50 2.50
Thickness (In.l 0.82 0.82 0.82
Water Content (%l 10.9 10.9 10.9
Dry Density (pcf) 53.8 53.8 53.8
Before Shear
Thickness (In.l 0.64 0.60 0.58
{
Water Content (%1 31.0 25.1 21.8
Dry Density (pcf) 68.4 73.2 76.0
Normal Stress 0.75 1.50 3.00
Shear Stress 0.75 1.37 2.18
"These tests are for informational purposes only and must be reviewed by a
qualified professional engineer to verify that the test parameters shown are
appropriate for any particular design."
Peak Conditions
At Given Shear Dis . Of: 0.3
0.4
Friction Angle: 0-- 31.9 deg.
Apparent 0.342 TSF
Cohesion
Friction Angle: 4-= 31.8 deg.
Apparent 0.248 TSF
Cohesion
3 -- a
2.5
m 1.5
0.5
0
0 0.1 0.2 0.3 0:
Shear Displacement (inch)
0.5
0+
0
0.5 1 1.5 2
Normal Stress (TSF)
OIL
9301 Bryant Ave. South, Suite 107 NGINEERING Bloomington, Minnesota 55420-3436
ESTING, INC.
2.5 3