E3S Web Conf.
Volume 60, 2018Ukrainian School of Mining Engineering
|Number of page(s)||10|
|Published online||16 October 2018|
Selective underground mining of complex structured ore bodies of Kryvyi Rih Iron Ore Basin
Kryvyi Rih National University, Department of Underground Mining of Mineral Deposit, 11 Matusevycha Ave., 50027 Kryvyi Rih, Ukraine
2 Kryvyi Rih National University, Department of Labor and Law, 11 Matusevycha Ave., 50027 Kryvyi Rih, Ukraine
* Corresponding author: email@example.com
Selective mining of complex structured ore bodies will enable increased iron content in the mined ore mass in underground mining at Kryvyi Rih iron ore basin applying the existing mining systems. The article determines the way the grade changes in a mine block of a complex structured ore body when applying bulk and selective mining as well as factors influencing indices of extracting ore mass from the block. The investigation results prove that it is reasonable to mine complex structured ore deposits with barren inclusions applying selective mining if the iron content in the block varies from 64 to 67% and horizontal thickness of the barren inclusion makes 4 – 12 m. At that, the thickness ratio should not exceed 0.3. Stoping methods should be applied to receive high indices of ore mass extraction. There is determined an ore/barren inclusion-to-ore body thickness ratio considering the dilution factor that confirms practicability of selective mining of complex structured ore bodies. Selective mining of complex structured ore deposits of Kryvyi Rih iron ore basin applying open stoping enables increasing the mined ore mass quality without considerable capital and operating costs and, consequently, staying on the market and enhancing the environmental situation in the region.
© The Authors, published by EDP Sciences, 2018
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