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Vol 148 No 1
Pages:
46-48
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RUS
Research article
Without section

Experimental studies of the destructive effect of explosion in a solid medium when changing the properties of explosives

Authors:
E. I. Efremov1
V. A. Nikiforova2
A. V. Ponomarev3
About authors
  • 1 — Institute of Geotechnical Mechanics of the NAS of Ukraine
  • 2 — Institute of Geotechnical Mechanics of the NAS of Ukraine
  • 3 — Dokuchaevskiy Flux-Dolomite Plant
Date submitted:
2000-06-21
Date accepted:
2000-07-22
Date published:
2001-01-01

Abstract

As is known, the mining of non-metallic minerals has special requirements for blasting operations, as the lumpiness of the blasted rock mass is limited not only by the maximum, but also by the minimum size of the lump. In determining the rational degree of crushing, for example, fluxing limestone and dolomite, along with the output of oversized fractions, it is necessary to consider the volume of over-crushed rock mass (fractions with particle size less than 5 mm), negatively affecting the yield of commercial products. In this case the second factor is often more significant, because in nonmetallic pits the yield of over-crushed rock mass reaches 20%, which not only leads to losses of commercial products, but also reduces the efficiency of the explosion (the huge cost of explosion energy for rock crushing). In this regard, studies of the influence of explosive properties of explosives on the yield of regrind product, taking into account the compliance of explosive properties with the nature of the destructed medium, are very important in terms of both energy consumption and resource saving (losses of minerals).

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References

  1. Азаркович А.Е. Оценка относительной взрывной эффективности различных взрывчатых веществ и массивов горных пород / А.Е.Азаркович, М.И.Шуйфер // Физико-техн. пробл. разраб. полезн. ископаемых. 1997. № 2. С.47-51.
  2. Воробьев В. В. Методы повышения эффективности взрывного разрушения горных пород на основе управления квазистатическим действием продуктов детонации: Автореф. дис. ... докт.техн. наук. Киев. 1998. 35 с.
  3. Ефремов Э.И. Прогнозирование дробления горных пород взрывом / Э.И.Ефремов, В.Д.Петренко, А.И.Пастухов. Киев: Наук, думка, 1990. 120 с.
  4. Ефремов Э.И. Оценка эффективности действия смесевых зарядов ВВ с энергоактивными добавками / Э.И.Ефремов, В.М.Комир, В.А.Никифорова // Высокоэнергетическая обработка материалов. 1999. № 8. С.77-80.
  5. Краснопольский И.А. Влияние свойств пород на показатели выхода переиэмельченных фракций / И.А.Краснопольский, И.Н.Усик // Совершенствование и развитие взрывных работ на флюсовых карьерах. Киев: Наук, думка, 1978. С. 18-20.
  6. Ханукаев А.Н. Критерий оценки взрывчатого вещества и его действия на горные породы / А.Н.Ханукаев, К.С.Ханукаева//Изв.вузов. Горн. журн. 1993. № 1. С.68-74.

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