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2014-05-02_REPORT - M1974004
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2014-05-02_REPORT - M1974004
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Last modified
8/24/2016 5:43:44 PM
Creation date
5/6/2014 9:48:30 AM
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DRMS Permit Index
Permit No
M1974004
IBM Index Class Name
REPORT
Doc Date
5/2/2014
Doc Name
Stability analysis of spec agg quarry
From
Martin Marietta Materials
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DRMS
Email Name
PSH
Media Type
D
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No
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Martin Marietta Materials <br />Spec -Agg 2014 Annual Report <br />previously recognized foliation F -3. Arrows shown in Figure 6 indicate the apparent shifts in <br />representative orientations of the observed discontinuity sets based on our evaluation of the new data. <br />As discussed above, joint set P -7 represents a new representative discontinuity orientation based on a <br />relatively tight clustering of joint measurements centered in a distinct orientation not well represented by <br />the previously recognized sets. <br />Representative discontinuity orientations used for this annual report are shown in Figure 7 and <br />summarized in Table 1 below. Joint set P-4 was again observed in the Southern Expansion Area. Joint <br />set P -6 was observed in a relatively tight clustering of joint measurements in the Southern Expansion <br />Area and shifts in representative orientations in more in line with 2012 annual report. We have tailored <br />our kinematic analyses to these observations, such that joint sets that were not observed in a particular <br />area are not considered in kinematic analyses for walls that line those areas. <br />Table 1: Representative Discontinuity Orientations <br />Discontinuity Set <br />Representative Orientation (Dip /Dip Direction) <br />2012 Annual Report <br />2013 Annual Report <br />2014 Annual Report <br />F -1 (Foliation) <br />33 0/1700 <br />43 0/1820 <br />33 °/170° <br />F -2 (Foliation) <br />24 0/1980 <br />13 0/2240 <br />22 °/257° <br />F -3 (Foliation) <br />36 0/2940 <br />Not observed <br />Not observed <br />P -1 (Joint) <br />74 0/1720 <br />74 0/1720 (unchanged) <br />74 0/1720 (unchanged) <br />P -2 (Joint) <br />62 0/0950 <br />55 0/0840 <br />59 °/87° <br />P -3 (Joint) <br />67 0/2550 <br />51 °/2640 <br />68 °/255° <br />P4 (Joint) <br />72 0/2960 <br />67 0/301 ° (Main Pit) <br />67 °/301° <br />P -5 (Joint) <br />67 0/3530 <br />Not observed <br />68 °/354° <br />P-6 (Joint) <br />57 0/0250 <br />66 0/051 ° (SEA)" <br />59 °/25° <br />P -7 (Joint) <br />Not differentiated <br />55 0/2130 <br />63 °/220° <br />SEA = Southern Expansion Area <br />6.2 Slope Geometry <br />Wall orientations used in this report are based on the mine plan developed by Martin Marietta (formerly <br />Lafarge West, Inc.) in December, 2003 (Figure 2). As discussed in 2013 annual report, we used the <br />same wall orientations for our analyses that have been used since the 2003 report; however, we added <br />several additional wall orientations and modified the wall designations slightly. The new and former wall <br />designations, slope angles, and slope dip directions used to represent the final quarry walls are presented <br />in Table 2 below. <br />March 31, 2014 Page 9 Lachel & Associates, Inc. <br />Project 13364013.00 ©2014 All Rights Reserved <br />
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