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Economic aspects of change-over to tnt-free explosives for the purposes of ore underground mining in Kryvyi rih basin

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Category: Economy and management

Last Updated on 23 September 2014

Published on 23 September 2014

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Authors:

M.B. Fedko, Cand. Sci. (Tech.), Associate Professor, Kryvyi Rih National University, Senior Lecturer of the Department of Undeground Mining, Kryvyi Rih, Ukraine

V.A. Kolosov, Dr. Sci. (Tech.), “Ukrrudprom”, Chairman of the Board, Kryvyi Rih, Ukraine

S.V. Pismennyi, Cand. Sci. (Tech.), Associate Professor, Kryvyi Rih National University, Senior Lecturer of the Department of Undeground Mining, Kryvyi Rih, Ukraine

Ye.V. Kalinichenko, Cand. Sci. (Econ.), Associate Professor, Kryvyi Rih National University, Senior Lecturer of the Department of Management and Administering, Kryvyi Rih, Ukraine

Abstract:

Purpose. To determine the economic feasibility of change-over to TNT-free explosives for the purposes of ore underground mining in Kryvyi Rih basin.

Methodology. In order to determine the economic aspects of change-over to utilization of TNT-free explosives in mines Kryvbass we have used such scientific and special research methods: the method of the critical analysis and synthesis of theoretical studies; system approach; method of economic and mathematical modeling.

Findings. We have proved that the cost of breaking of 1t of ore by TNT-free explosives and non-electrical means of initiation is lower than by traditional TNT-explosives and electrical means of initiation by 3.3 UAH / ton, or by about 16%. Considering total annual volume of ore production in Krivbass, that is about 9.6–10 million tons (Shahtouprovlenie “ArcelorMittal Krivoy Rog”, mine PAO “Krivbasszhelezrudkom” and PAO “Evraz Sukha Balka”) the overall economic effect will be about 31.7–
33 million USD per year.

Originality. We have determined the new dependencies of production costs on the type of ore and explosive properties of emulsion explosives. The results showed that the emulsion explosives have greater relative performance and charge density compared with grammonite 79/21.

Practical value. It is found that when using emulsion explosives the parameters of wells can be improved by 10–15%, which will increase the output of ore from 1m of a well by approximately 20%. This will allow us to reduce proportionally the overall length and number of deep wells both during cutoff stope formation and general panels breaking. Additional overall economic effect of TNT-free explosives utilization will be achieved due to annual production of about 1.5 million tones of magnetite quartzite in Kryvyi Rih basin, where basic production costs are spent on breaking. Use of TNT-free explosives will increase greatly the safety of work; reduce the number of occupational diseases caused by the contact of workers with TNT explosives. 

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