Influence of rock massif stress-strain state on uranium ore breaking technology

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Authors:

N.I. Stupnik, Dr. Sci. (Tech.), Professor, State Higher Educational Institution "Krivoy Rog National University", Acting Rector, Krivoy Rog, Ukraine

V.A. Kalinichenko, Dr. Sci. (Tech.), Professor, State Higher Educational Institution "Krivoy Rog National University," Dean of the Faculty of Mining, Krivoy Rog, Ukraine

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

Ye.G. Mirchenko, Mine “Smolinskaya" of State Enterprise “VostGOK”, Chief Engineer, Krivoy Rog, Ukraine

Abstract:

Purpose. To study the influence of the stress-strain state of rock on the technology of uranium ore breaking and improve the drilling and blasting operations in the mines of State Enterprise “VostGOK”.

Methodology. We have used the following research methods: methods of mathematical, statistical and graphical simulation, method of systematic approach, method of economic and mathematical modeling.

Findings. As a result of the studies we found out that the following blasting conditions affect the drilling and blasting performance significantly: combined effect of static and dynamic stress fields both natural (caused by the geological structure of the undermined area or the rock pressure behavior) and man-made (created by means of various technical solutions). This can make breaking more efficient through improvement of the quality of ore crushing, reducing the consumption of explosives, increasing productivity of workers, etc.

Originality. We have found out that when breaking underground uranium ore in the narrow space the wells, commonly, are located in the points affected by the high compressive stress. This increases the resistance of the layer affected by blasting, and it causes incomplete breaking of ore or well shooting. In this case the actual specific consumption of explosives during breaking exceeds the optimum.

When breaking process is carried out in wide area and wells are located in the unstressed place the resistance of ore to explosion is reduced. This reduces the amount of energy spent on breaking.

Practical value. During determining the parameters of the drilling and blasting operations for underground mining of uranium ore deposits we recommend to use improved method of Professor Yu.P. Kaplenko, which takes into account the stress-strain state of the massif, and improves the quality of ore reduction during the breaking.

 

Рекомендованодо публікації докт. техн. наук Б.М. Андреєвим. Дата надходження рукопису 20.11.12.

References:

1. Жуков С.А. Технологические проблемы выработанных пространств подземных рудников / С.А. Жуков, В.А. Калиниченко – Кривой Рог: Минерал, 2007. – 163 с.

Zhukov, S.A. and Kalinichenko, V.A. (2007), Tekhnolo-gicheskiye problemy vyrabotannykh prostranstv podzem-nykh rudnikov [Technological Problems of Mined Out Spaces in Underground Ore Mine], Mineral, Krivoy Rog, Ukraine

2. Калиниченко В.А. Исследования напряженно-деформированного состояния комбинированных искусственных массивов / В.А. Калиниченко // Матеріали міжнародної науково-практичної конференції „Сталий розвиток гірничо-металургійної промисловості – 2006”. Додатковий випуск. – КривийРіг, 2006. – С. 155–156.

Kalinichenko, V.A. (2006), “Study of stressed state of complex artificial massif”, Proc. of the Conf. “Sustainable development of mining and metallurgical industries – 2006”, Kryvyi Rih, Additional issue, pp. 155–156.

3. Кузьменко А.М. Состояние массива горных пород вокруг очистного забоя в зонах интенсивной трещиноватости / А.М. Кузьменко // Науковий вісник Національного гірничого університету. – Дніпропетровськ,2007. – №6. – С. 22–24.

Kuzmenko, A.M. (2007), “State of massif around production face in zones with fractured rock”, Naukovyi visnyk Natsionalnoho hirnychoho universytetu, no.6, pp. 22–24.

4. Калиниченко В.А. Аналитическое определение напряженно-деформированного состояния горного массива вокруг „пионер-камеры“ лежачего бока / В.А. Калиниченко // Науковий вісник Національного гірничого університету. – Дніпропетровськ, 2007. – №12. – С. 19–23.

Kalinichenko, V.A. (2007), “Analytical determination of stressed state of massif around ‘pioneer-room’ of bottom layer”, Naukovyi visnyk Natsionalnoho hirnychoho universytetu, no.12, pp. 19–23.

5. Капленко Ю.П. Влияние напряженного состояния горного массива горногеологических условий на параметры обнажений и форму очистных камер / Ю.П. Капленко, В.В. Цариковский // Разработка рудных месторождений. – Кривой Рог: КТУ. – 2005. – Вып.88. – С. 21–24.

Kaplenko, Yu.P. and Tsarikovskiy, V.V. (2005), “Influence of stressed state of massif on parameters of disclosure and dimensions of production rooms”, Razrabotka rudnykh mestorozhdeniy, KTU, Krivoy Rog, Issue 88, pp. 21–24.

6. Капленко Ю.П. Методические указания по определению оптимальных параметров БВР / Капленко Ю.П. – Кривой Рог: КТУ, 2008. – 52 с.

Kaplenko, Yu.P. (2008), Metodicheskiye ukazaniya po opredeleniyu optimalnykh parametrov BVR [Guidance on Determination of the Optimum Parameters for Drilling and Blasting Process] KTU, Krivoy Rog, Ukraine.

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ISSN (print) 2071-2227,
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