Application of electro-discharge blasting technology for destruction of oversized rocks and rock massive splitting off

N. V. Voitenko, A. S. Yudin, N. S. Kuznetsova

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

The investigation of possibilities of the plasma blasting technology is considered. The method is based on the initiation of a pulsed electric discharge inside the solid dielectric material. The expanding plasma channel generates a shock wave which in the vicinity of the channel (1-2 mm) transforms into the elastic wave with an expressed region of tensile tangential stresses that in turn stimulate the radial crack nucleation. The efficiency of solid destruction at shock-wave action strongly depends on the pulse parameters. The high-current pulse must fulfil the requirements to such parameters: the high-rate of rising edge (0.1-10 μs) and pulse duration (≥ 200-300 μs). The experimental results have shown that the optimal ratio of the borehole depth is 0.6-0.7 from the oversize rock height. For splitting rock massive off the borehole depth should be at least 2 and not more than 5 electro-explosive cartridge lengths and distance between the boreholes should be equal to 1-2 of the boreholes depths. On the basis of the experimental results the recommendations for the electro-discharge destruction and splitting off oversized rocks are presented.

Original languageEnglish
Title of host publicationAdvanced Materials for Technical and Medical Purpose
PublisherTrans Tech Publications Ltd
Pages15-19
Number of pages5
Volume712
ISBN (Print)9783035710649
DOIs
Publication statusPublished - 2016
EventWorkshop on Advanced Materials for Technical and Medical Purpose, AMTMP-2016 - Tomsk, Russian Federation
Duration: 15 Feb 201617 Feb 2016

Publication series

NameKey Engineering Materials
Volume712
ISSN (Print)1013-9826

Conference

ConferenceWorkshop on Advanced Materials for Technical and Medical Purpose, AMTMP-2016
CountryRussian Federation
CityTomsk
Period15.2.1617.2.16

Keywords

  • Destruction of rock
  • Electro-discharge blasting
  • High-current pulse generator
  • Plasma channel

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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  • Cite this

    Voitenko, N. V., Yudin, A. S., & Kuznetsova, N. S. (2016). Application of electro-discharge blasting technology for destruction of oversized rocks and rock massive splitting off. In Advanced Materials for Technical and Medical Purpose (Vol. 712, pp. 15-19). (Key Engineering Materials; Vol. 712). Trans Tech Publications Ltd. https://doi.org/10.4028/www.scientific.net/KEM.712.15