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i• <br />position must be utilized. some parameters, such as discontinuity <br />length and continuity are impossible to obtain from oriented core. <br />Photograohic maooinq - photomosaics may be made and covered with <br />clear plastic so that locations of discontinuities, changes in <br />geologic nature, problem areas, and other significant features in <br />C00.905. 011 CMANA6E <br />SfTE ~ e1ow+/ iTTI i ELEV ~ iPtw ~ DeS. m W1ME~ <br />TiW [R$E suTw1 DATE <br />I I 1 1 EA$t~ ~i ~ FLIA+eE ® 1EM87H® <br />UiIDN fBnY D6iANCE $TR N~ ~'! DIP 511E 06yy MJG$ W A YLIMIE$$ <br />ff PpM fREtO liEc T) TYPE i'IPE JN$ In~PT9leE _ AIIG DIR L[F ~ I TYPE IC1E~p $ ILA ltN ~~~ <br />I s + a rlr n n a r.1 ~ 2 r Ts n L a » r+ ~ s <br /> <br /> <br /> I <br /> i I i <br /> <br /> t I <br /> i <br /> <br /> <br /> <br /> I I I <br /> i <br /> <br /> <br /> <br /> <br /> <br /> <br /> I <br /> <br />Figure 1. Typical data sheet for recording information durinc <br />detail line mapping (from Piteau and Associates Limited, <br />1980). <br />a rock slope may be traced on the photos and annotated at the site. <br />This should be done in addition to any of mapping techniques where <br />possible. It allows a record of both the window and non-window <br />areas to be made. Photographs also are of help in documenting any <br />changes that occur in the slope with time. <br />3. Performing stereonet analyses <br />stereonets permit the three-dimensional analysis of discontinuity <br />orientations by stereograohic projection. This enables the <br />identification of unfavorable discontinuity orientations in a given <br />slope or allows for the determination of more favorable slope <br />geometries during the design phase. These are often referred to <br />as kinematic analyses. Kinematics refers to the branch of dynamics <br />that examines motion or potential motion without considering mass <br />and force. Potential plane, wedge, and toppling rock failures may <br />be identified kinematically on stereonets. <br />4. Calculating safety factors <br />Once discontinuities having unfavorable orientaticns are <br />identified, safety factors against translational sliding may be <br />Stereonet Analyses <br />Appendix A <br />/y1,Q-3 L1 <br />/~OPRovED ~/~v~6H <br />