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2.1.1 Review of $lasting Vibration Phenomena: <br />When explosive char~cs cla,tunate iii r~Na., ni°urly all of the availahlr energy is used in brcakin•~ and <br />displacing the rockiness. However, a small portion of the cner;~ry is released in the Iona of vibration <br />waves, which radiate away li~urn blast chai;~es. When Ihese elae~ic sprain-waves pass tl7ruug'h ruck <br />ur earth, they cause an oscillating mnl.iun in the ground p:u•ti~,les. <br />Abbreviations: <br />SH =Shear wave, horizontal <br />SV =Shear wave, vertical <br />K = Kaylciyh wavy <br />P = Gompmssional wave <br />.~ ~~ <br />:' ~ P <br />Wave Exteni /~' ~ - <br />SH <br />POint OY Shnt <br />~. <br />~, <br />,'/ <br />ti.~ <br />R <br />{~igurc~ ?. i -Vibration Waves <br />lrisnuc wa4e:: dreay e'a'iih a.lishn~c, .es ihry as;.r,<•I ~hru~r~h +hr ~a~rv~aamd~in~ era ;i. I'hrar wat,rs h;rvr <br />dilli~rriU 17,rnas, :nrla .~s hodv :.end :;nrtarr ws~rs. R'hrir ~drarar~~eristirs will vary ::urncwhai with <br />a')talitia•s +n la„;il ~{e~aak~~y hkif !hr r<iia• .?~ whia~h iha~y alir rani is rr:.tsu:e~ai~ly rrmsi:;ia'~ii, aril <t11uw:; <br />+~•uiufury ngrnru~n In a~rmi~nl tatR~fiu~~ ~rjir'raiiuru by nu airs ui~rclafiaaiatihips hrl~t~r.~3r di`+laltrc and <br />ihr rxpiusivr r~harge yuaniiiics. 6;aa•6 ~imr tire' iiisianr,~ is aiuntl)oCt, ihr- vihrasinn iNcnsiay drops in <br />about 9/3 r~i~il.. thrma~r valor. I'hr =-nl~zisirn<~Y ui~,t~ronnd +no~fntr _~Urun.elson is sty>In~eled by <br />rasa arch dune by tJ.S. iiurcau ol~ 1~linrs (Nichols b~t ,_il., t't7!~). t hr ra~x,•archrrs Ibmiit that under <br />widr~ly varvin~ conditions, il'a scab°d distance ol~:ill-li/Ih"~ is itnrd ia. (imii rhara;r~ wei~;his, it is <br />highly anlikeiy that ground ou~liun would cause an darnagi°_ hur i.hr purjx~ses ul~grouod vibration <br />assessrnen~s, scaled dislauce (SI)) is distance Crom [hc blast divided <br />