REP48063

• Permit No: M1974004
• IBM Index Class Name: Report
• Doc Date: 4/15/2004
• Doc Name: Slope Stability Report
• From: Lafarge
• To: DMG
• Media Type: D
• Archive: No

Table 2: Representative Discontinuity Orientations

Concentration
Center 1997-2002

L&A

Mapping
Data 2003

Main Pit

Borehole
Data 2003

Southern
Expansion

Borehole Data 2004

L&A

Mapping
Data

Entire Dataset
(2716 Points)
F-1 (Foliation) 165°/39° 168°/38° 177°/35° - 159°137°
F-2 (Foliation) - - 258°/17° (1) 241°114° -
P-1 181 °/69° 178°/74° 171 °/75° 177°/85° 175°/72°
P-2 086°/65° 082°/63° 095°/55° 102°/68° 086°/60°
P-3 254°/75° 256°/66° 248°/53° 269°/67° 250°/66°
P-4 297°/70° 294°/70° 316°/41° 302°/78° -
P-5 343°/89° 349°/62° 343°/73° - 344°/63°
P-6 034°/62° 037°/57° 031°/55° 025°/75° 027°/56°
(1) Orientation of foliation in upper 300 feet of boring DH-03-03
(2) The orientations in bold were used for this study
Note the overall adjustments that have been made to the general orientations for
each of the joint sets based on the combined discontinuity data obtained over
multiple years' analyses. Overall, the joint sets obtained by analysis of the entire
dataset (i.e., 2,716 points) are consistent with the cluster analysis from previous
' years' individual analyses, with the exception of joint set P-4, and the second
foliation orientation, F-2 (Figure 9). Both of these two discontinuity orientations
' are identifiable within the quarry, but have not been recorded in large enough
quantities to create a strong signature in the analysis of the entire dataset.
' However, based on the prevalence of these discontinuities in the southern
expansion area, both of these orientations have also been used in this analysis.
' To adequately understand the impacts of the new data on wall stability, the
' planes representing each discontinuity set and the plane representing the
orientation of the respective quarry wall slope face were plotted for each wall.
' The stereographic analysis of each quarry wall is presented in Figures 10-12 and
14-16.

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