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• <br />• <br />• <br />Environmental Stratagies <br />500 <br />400( <br />3 <br />~ 300( <br />y <br />b <br />rn <br />'~ <br />~ 200( <br />100( <br />17+00 (a~ 5-7 <br />O _L._L-L_ LJ <br />0 1000 2000 3000 4000 5000 6000 7000 8000 <br />Normal stress, 6 (psf) <br />I I I ~ <br />5000 - ~ <br />Continuous Q' P' ~ , I <br />' ~ i ~ I <br />Total stress ~ <br />- - - - - Effective stress <br />4000- --- -- 7--- -; - ------ 7----- -- ------ - -- --- - -- -- - _ .. --- - <br />~ 3000 <br />y <br />d <br />2000 <br />10001- ---~!-'C~ - ---~- ;- --.~ .. { .I i <br />I <br />V~ ~ 1 .r4 <br />O _.L._J-1.. L I^_L_1_1_.. .e. .J_L l__t_l. l__.I ._.Jp LL_ __1.J _..L lJ--.I.-1_.I L_i _L_ <br />0 1000 2000 3000 4000 5000 6000 7000 8000 <br />P ~Ps~ <br />West Elk Mine Rd. <br />-- ----...._ i -- --- - i ----- ------- }- - --- --- <br /> i i <br />~~ <br /> <br />- i ` - - - <br />1 -- -- --- -- - ---,. <br />~~ -- <br /> ~ l <br /> ~ / ~ ~ <br /> <br /> <br /> <br />~ ~ <br />~ ~ <br />~ ~ ~ \ <br /> <br />~J_ ( <br />L1-L.J- 0 <br />