2008-02-25_GENERAL DOCUMENTS - M1974004

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0 C Table 2: Representative Discontinuity Orientations Dip Direction/Dip Concentration Entire Dataset Center 2007 Final Including 2008 Data Results (3,036 Points Total) F-1 (Fol) 159°/35° 1600/35° F-2 (Fol) 198°/24° 198°/24° * F-3 (Fol) 294°/36° 294°/36° * P-1 (Joint) 171 °/76° 1720/750 P-2 (Joint) 087°/63° 086°/58° P-3 (Joint) 2510/680 2520/630 P-4 (Joint) 287°/70° 282°/70° P-5 (Joint) 3450/620 343°/64° P-6 (Joint) 028°/53° 0410/56° * Derived from previous ears analysis The results for the 2008 analysis did not change the pole or the resultant concentration center for any of the delineated joint sets significantly from any of the 2007 analysis results. The collected data for this evaluation was complimentary to the existing growing dataset and generally were consistent with past analyses. We have continued our analysis of the available cluster data to assess the hypothesis that two distinct "structural blocks" exist within the quarry, and two cluster analyses showing the poles based on collection areas have been developed (Figures 9 and 10). The datasets have been broken down based on the location and year that the data were collected with the southern expansion area separated geographically from the main pit area of the quarry (including the middle level) by the approximately east-west trending fault that is mapped between the two areas (Figure 3). Currently the 1997-2002 data continue to be analyzed as a single data set and are included in both the upper and lower analyses, but data collected since 2003 have been separated for the analysis based on this potential boundary. The results show that the data in the main pit have a tighter clustering around the primary discontinuity orientations (Figure 9), but overall similar clusters were found in the expansion area, with only a weak fingerprint for the F- 3 discontinuity set differentiating the two (Figure 10). -12-