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 language | English |
|---|---|
| Title of host publication | Advanced Materials for Technical and Medical Purpose |
| Publisher | Trans Tech Publications Ltd |
| Pages | 15-19 |
| Number of pages | 5 |
| Volume | 712 |
| ISBN (Print) | 9783035710649 |
| DOIs | |
| Publication status | Published - 2016 |
| Event | Workshop on Advanced Materials for Technical and Medical Purpose, AMTMP-2016 - Tomsk, Russian Federation Duration: 15 Feb 2016 → 17 Feb 2016 |
Publication series
| Name | Key Engineering Materials |
|---|---|
| Volume | 712 |
| ISSN (Print) | 1013-9826 |
Conference
| Conference | Workshop on Advanced Materials for Technical and Medical Purpose, AMTMP-2016 |
|---|---|
| Country | Russian Federation |
| City | Tomsk |
| Period | 15.2.16 → 17.2.16 |
Fingerprint
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
Cite this
Application of electro-discharge blasting technology for destruction of oversized rocks and rock massive splitting off. / Voitenko, N. V.; Yudin, A. S.; Kuznetsova, N. S.
Advanced Materials for Technical and Medical Purpose. Vol. 712 Trans Tech Publications Ltd, 2016. p. 15-19 (Key Engineering Materials; Vol. 712).Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - Application of electro-discharge blasting technology for destruction of oversized rocks and rock massive splitting off
AU - Voitenko, N. V.
AU - Yudin, A. S.
AU - Kuznetsova, N. S.
PY - 2016
Y1 - 2016
N2 - 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.
AB - 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.
KW - Destruction of rock
KW - Electro-discharge blasting
KW - High-current pulse generator
KW - Plasma channel
UR - http://www.scopus.com/inward/record.url?scp=84990842247&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84990842247&partnerID=8YFLogxK
U2 - 10.4028/www.scientific.net/KEM.712.15
DO - 10.4028/www.scientific.net/KEM.712.15
M3 - Conference contribution
SN - 9783035710649
VL - 712
T3 - Key Engineering Materials
SP - 15
EP - 19
BT - Advanced Materials for Technical and Medical Purpose
PB - Trans Tech Publications Ltd
ER -