2006-06-07_PERMIT FILE - C1996083

• Permit No: C1996083
• IBM Index Class Name: Permit File
• Doc Date: 6/7/2006
• Doc Name: 02/15/2006 Gob Pile #2 Stability Evaluation TR-42 Buckhorn Geotech Inc
• Section_Exhibit Name: Volume IX Coal Waste Disposal Area No. 2
• Media Type: D
• Archive: No

GEOTECH
10000
8000
6000
Cr 4000
2000
0
Civil, Structural & Geotechnical
222 South Park Ave. • Montrose, CO 81401
Ph.: [phone] • FAX: [phone]
EFFECTIVE STRESS ANALYSIS - CU TRIAXIAL SHEAR
Borehole ID: BG05-06
Sample ID: SH-02
Sample Depth: 27.5-29 ft
Effective Stress Path Analysis - SH-02
-- ---------------- -- --------- -- ----- - -- ----- - - -- - -- - - -- --- - ------------ ---- -- -----
--- - - - - -- - --- -- - - --------- -- -------- ---------- - - ---------- --- - - -- -----
��7 -----------
0- ---- ---- - - - - -
- -- - ---- --- ----- ----------- ------ - -- ----- -- - -- -- --- -- ---
0 2000 4000 6000 8000 10000 12000 14000 16000 18000 20000
P, P, (Psf)
Effective Stress Analysis - SH-02
-1 0 2000 4000 6000 8000 10000 12000 14000
P, (Pso
-1
OVVV
q
7000
(Psf)
6000
2 (40 psi)
4253
5000
3 (80 psi)
11973
6688
4000
3000
2000
1000
0
Civil, Structural & Geotechnical
222 South Park Ave. • Montrose, CO 81401
Ph.: [phone] • FAX: [phone]
EFFECTIVE STRESS ANALYSIS - CU TRIAXIAL SHEAR
Borehole ID: BG05-06
Sample ID: SH-02
Sample Depth: 27.5-29 ft
Effective Stress Path Analysis - SH-02
-- ---------------- -- --------- -- ----- - -- ----- - - -- - -- - - -- --- - ------------ ---- -- -----
--- - - - - -- - --- -- - - --------- -- -------- ---------- - - ---------- --- - - -- -----
��7 -----------
0- ---- ---- - - - - -
- -- - ---- --- ----- ----------- ------ - -- ----- -- - -- -- --- -- ---
0 2000 4000 6000 8000 10000 12000 14000 16000 18000 20000
P, P, (Psf)
Effective Stress Analysis - SH-02
-1 0 2000 4000 6000 8000 10000 12000 14000
P, (Pso
-1
tan(y') =
P'
q
Point
(Psf)
(Psf)
2 (40 psi)
4253
2165
3 (80 psi)
11973
6688
tan(y') =
0.548
at =
50
(P' =
33.2 degrees
ct =
59.8 psf