METHOD FOR ORE QUALITY CONTROL AT UNDERGROUND DEVELOPMENT OF HEAVY STRUCTURE-COMPLICATED HIGH-GRADE IRON ORE DEPOSITS

摘要

FIELD: mining.;SUBSTANCE: method includes iron ore deposit development by wide cuts for passing of which there used are heading machines with executing element of selective action. The boundaries of iron ores separation with different ferrum content are defined within the area of wide cuts face. At cuts passing first there performed is the breaking of ore with ferrum content exceeding the required level, after that there performed is the breaking of ore with ferrum content not exceeding the required level. Note that the breaking of ore with ferrum content exceeding the required level is done with higher cutting speed and lower speed of feeding the executing element of machine to the face, than at breaking of ore with ferrum content not exceeding the required level. Ore mass broken by machine is transported to the screen, where small fractions of ore with ferrum content exceeding the required level are separated.;EFFECT: increase of reliability of creating iron ore flows with required level of ferrum content.