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Prospects of application of TNT-free explosives in ore deposites developed by uderground mining

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Category: Mining

Last Updated on 19 March 2014

Published on 26 February 2013

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Authors:

N.I. Stupnik, Dr. Sci. (Tech.), Professor, State Higher Educational Institution “Kryvyi Rih National University”, Deputy Rector, Kryvyi Rih, Ukraine

V.A. Kalinichenko, Dr. Sci. (Tech.), Professor, State Higher Educational Institution “Kryvyi Rih National University”, Dean of the Faculty of Mining, Kryvyi Rih, Ukraine

M.B. Fedko, Cand. Sci. (Tech.), Associate Professor, State Higher Educational Institution “Kryvyi Rih National University”, Senior Lecturer of the Department of Mineral Deposits Underground Mining, Kryvyi Rih, Ukraine

Ye.G. Mirchenko, Mine“Smolinskaya”, “GPVostGOK”, Ukraine

Abstract:

Purpose. To choose the simplest types of explosives and provide the theoretical and practical rationale for the change-over to economical, safe and environment friendly TNT-free explosives.

Methodology. To determine the prospects of TNT-free explosives use in ore mines with underground production we have used following scientific and special methods: methods of mathematical, statistical and graphical simulation, method of systematic approach, method of economic and mathematical modeling.

Findings. The effectiveness of use of simple explosives in the underground conditions depends on strength and water content of rocks, as well as on the physical stability of the explosive mixture.

During blasting it is necessary to exclude the use of explosives with oxygen disbalance or containing unstable components which vary depending on the geological conditions in the wells.

Originality. We have found out that the explosive mixtures of equal chemical composition but different by physical features this displacement have different values of the critical limit and d_cr, d_pr charge diameter. Thus, the mixtures of diesel fuel with nonporous nitrate and with porous nitrate in cartridges with hard shell have d_cr of 120–160 mm and 70–100 mm respectively. Critical parameters of detonation and explosive characteristics of igdanite with charge diameter under the limit strongly depend on the properties of nitrate granules, their porosity, absorbency regarding diesel fuel, surface area, etc.

Practical value. To supply the mining companies of Ukraine with waterproof and safe explosives it is recommended to use emulsion explosives of “EPA-R” brand of 2^nd class for loading cartridges with diameter of 32–90 mm into wells. These explosives are initiated from a blasting cap or the detonator fuse and are used in mines which are not dangerous by of gas and dust parameters. By performance and safety the packaged explosives of “EPA” brand excel traditional ammonite no.6 ZhV.

References:

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Yefremov, E.I. (2010), “Experience of Use of Simple Explosives in Open-Cast Mines of Ukraine”, Ukrainian Union of Mining Engineers, Information Bulletin no.4, pp. 9–11.

2.   Крысин Р.С. Современные взрывчатые вещества местного приготовления / Р.С. Крысин, В.Н. Домничев – Днепропетровск.: Наука и образование, 1998. – 140с.

Krysin, R.S. andDomnichev, V.N. (1998), Sovremennye vzryvchatye veshchestva mestnogo proizvodstva [Modern Explosives ofLocal Production], Naukaiobrazovanie, Dnepropetrovsk, Ukraine.

3.   Захаренков Е.И. Состояние взрывного дела на Украине. Государственный надзор в сфере обращения со взрывчатыми материалами промышленного назначения / Захаренков Е.И. // Украинский союз инженеров горняков. Информационній бюллетень– 2010. – №4. – С. 3–8.

Zakharenkov,Ye.I. (2010), “State of blasting in Ukraine. State supervision in the treatment of industrial explosives”, Ukrainian Union of Mining Engineers, Information Bulletin no.4, pp.3–8.

4.   Мельников Н.В. Повышение полезной работы взрыва при отбойке полезных ископаемых /Мельников Н.В. // Взрывное дело – М.: Недра. –№ 54/11 – С. 7–34.

Melnikov,N.V., “Increase of explosion efficiency during cutting ofmineral resources”, Vzryvnoye delo, no.54/11, Nedra, Moscow,pp. 7–34.

5.   Шиман Л.Н.Передовые high-tech технологии для обеспечения безопасности проведения буровзрывных работ / Шиман Л.Н., Устименко Е.Б. // Украинский союз инженеров горняков. Информационный бюллетень–2008. –№11.–С. 17–29.

Schiman, L.N. andUstimenko, Ye.B.(2008), “Advanced technology forensuringthe safety during drilling and blasting”,Ukrainian Union of Mining Engineers,Information Bulletin no.11,pp. 17–29.

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