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<br />• <br />DRAwIUC z.o'>.s~I) <br />TYPICAL EXTRACTIO`: h1CTIlOD <br />-- 70 ~ _....-----• - -~ <br />0 <br />W <br />' Recovery Ca1c~~~aLion: Area of influence= <br />70x80=5600 ft2 Recover: 56001 S1x61~ + <br />(20x20)=2889 <br />Pb recovery=2889;-5600=51.6°d <br />i <br />60'x80' Pillars I <br />__~ 1~ ..... -- - -... <br />cm <br />m <br />• <br /> <br />41' <br />110' <br />a -+ <br />rv ~ <br />10' <br />RPrnvery Calculation: ~.rca of <br />influence=60x8D=400 ft <br />~"~' Recovery: 4800-(41x611+(1Ox20~= <br />2499 <br />°~Recnvery= 2499;4800=52.1°0 <br />