铁矿山开采基本知识
40 , 204 : 44 , 160 , 19719 t ( , , ) 1949～1957 ,80% 40 , 204 : 44 , 160 , 19719 t ( , , ) 1949～1957 ,80% , 20% , , , 90 , 80%, 20% ( ) 1996 18538 t, 735% 27 , 9106 t, 10637 t 856% : 2767%, 9707%, 439%, 274t/t, 750m/a , , , , 1996 , 23787m, 31611m( ); 14066m, 25279m( ) , 1996 , 4～46m3 , 1333 t, 16m3 , 3475 t, 4821 t( ) , 80 , ( ) 108～154t , , 1996 ,108t 359 t;154t 895 t, 123 t( www.taodocs.com 40 , 204 : 44 , 160 , 19719 t ( , , ) 1949～1957 ,80% 40 , 204 : 44 , 160 , 19719 t ( , , ) 1949～1957 ,80% , 20% , , , 90 , 80%, 20% ( ) 1996 18538 t, 735% 27 , 9106 t, 10637 t 856% : 2767%, 9707%, 439%, 274t/t, 750m/a , , , , 1996 , 23787m, 31611m( ); 14066m, 25279m( ) , 1996 , 4～46m3 , 1333 t, 16m3 , 3475 t, 4821 t( ) , 80 , ( ) 108～154t , , 1996 ,108t 359 t;154t 895 t, 123 t( www.taodocs.com
); 42t , 276 t, 443 t( )1965 , ,1996 , :80t 7918 t,100t 5499 t,150t 8826 t , , , , 80 , , , 1994 " " " " , , , , , , ( ) 1996 6690 t, 265% 17 , 1536 t, 144% : 369%, 762%, 198%, 698m , , 72%, , 9%, 8%, 7%, 3%, 1% 50 , , , , , , , , 1949 , 199t/( ·a), 1995 561t/( ·a), 30 , ( 975%) ( ) ( 1/3), 1996 21497 t, 25228 t 852% 85857 t, 10961 www.taodocs.com ); 42t , 276 t, 443 t( )1965 , ,1996 , :80t 7918 t,100t 5499 t,150t 8826 t , , , , 80 , , , 1994 " " " " , , , , , , ( ) 1996 6690 t, 265% 17 , 1536 t, 144% : 369%, 762%, 198%, 698m , , 72%, , 9%, 8%, 7%, 3%, 1% 50 , , , , , , , , 1949 , 199t/( ·a), 1995 561t/( ·a), 30 , ( 975%) ( ) ( 1/3), 1996 21497 t, 25228 t 852% 85857 t, 10961 www.taodocs.com
t, 4158 t, 484% ( ) , 12m 15m , 21m 22m , 21m 22m , 1m, , , 12mm ( ) , , , , 36m×6m, 32m×45m, 55m×18m, 27m×36m , ( ) 1 " " , , , ( ), , ( )( 3223) , 70 , , 62% 66% , 65% 3223 m3-2-23jpg www.taodocs.com t, 4158 t, 484% ( ) , 12m 15m , 21m 22m , 21m 22m , 1m, , , 12mm ( ) , , , , 36m×6m, 32m×45m, 55m×18m, 27m×36m , ( ) 1 " " , , , ( ), , ( )( 3223) , 70 , , 62% 66% , 65% 3223 m3-2-23jpg www.taodocs.com
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