1981-11-13_PERMIT FILE - C1981013 ‎(47)‎

• Permit No: C1981013
• IBM Index Class Name: PERMIT FILE
• Doc Date: 11/13/1981
• Doc Name: Geotechnical Investigation
• Section_Exhibit Name: Volume 2 Exhibit 15
• Media Type: D
• Archive: No

TABLE 1
Slope Stability - Allen Mine
I. Huang Nomograph
CASE 1 PHI=O CASE 7 P11I=30 CF=0.025 CASE 3 C=0
D L1 F1 F2 NS L1 F1 F2 NS L1 F1 F2 NS
ALPHA = O SETA.= 25
0.0 1.030 0.377 0.000 BOB 1.000 0.212 0-:000 11.0'� 1w000 0.183 0.000 12.54
0.4 0.323 0.085 0.4 62 6.053 0.0.3 S 0.063 0.332 7_61 0.329 0.058 0.327 7.79
0.6 0.259 0.057 0.576 6.25 0.267 0.039 0.457 6.94 0.269 0.035 0.449 7.10
0 .8 0.218 0 .040 0.680 6.06 0.227 0.024 0.555 6.71 0.227 0.024 0.555 6.71
1 .0 0.188 0.031 0.786 5.94 .0.196 0.017 0.656 6.47 0. 198 0.015 0.645 6.60
ALPHA = 0 BETA - 30
0.0 1.000 0.360 0.000 7.56 1 .000 0.191 0.000 10.15 1.000 0.151 0.000 12.38
0.4 0.325 0.079 0.45,4 6.22 0.333 0.055 0.32T 7.17 0.33 8.25 4 0.052 0.308 T.58
0.6 0.261 0.052 0.565 6.02 0 .271 0.033 0.434 6.85 0.274 0.029 0.424 7.06
0.8 0. 190 0.038 0.673 5.81 0 .199 0.014 0.633 6.45 0.200 0.013 0.630 6.49
ALPHA = 0 BETA - 35
0.0 1 .000 0.355 0.000 6.94 1 .000 0.166 0 .000 9.84 1.000 0.139 0.000 11.44
0.2 0 .444 0.130 0.324 6.22 0.450 0.036 0.171 8.07 0.450 0.079 0.155 8.84
0.4 0.327 0.073 0.453 6.02 0.336 0.051 0 .301 7.23 0.338 0.047 0.2Q5 7.45
0.6 0.263 0.048 0 .564 5.88 0.274 0.029 0.421 6.77 0.274 0.029 0.410 6.94
1.0 0.190 0.027 0.773 5.73 0.200 0.013 0.620.528 6.42 0.200 0.013 0.620 6.42
Figure 15. Stability coefficients for sidehill embankment analysis. (ref: Huang , 1978)
II . Analysis
A. For c1=0, D=0
F= Ns(F1 tan )
B. For a= 0
1 . s= 25 ) 2. g= 300
F= (12.45) (0.183)(tan 38.1 °) F=(12.38) (0.151 )(tan 38.1 )
F= 1 .80 F= 1 .47
C. For t = 26.6° (2H:1V slope)
F= 1 .80 - ( (1 .80-1 .47)/5)(1 .6)
F= 1 . 70 �---