Pulsed electric breakdown and destruction of granite

Citation
H. Inoue et al., Pulsed electric breakdown and destruction of granite, JPN J A P 1, 38(11), 1999, pp. 6502-6505
Citations number
6
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Volume
38
Issue
11
Year of publication
1999
Pages
6502 - 6505
Database
ISI
SICI code
0021-4922(199911)38:11<6502:PEBADO>2.0.ZU;2-I
Abstract
There are various methods of rock drilling and demolition. Recently, a meth od utilizing pulsed power technology has appeared. This method is based on the difference of the dynamic breakdown field strength of Liquid and solid dielectrics. The applicability of this method was examined using a very har d rock-granite. The features of the rock destruction have been studied. The X-ray computer tomography was used to confirm the penetration of the elect rical discharge into the rock. Well-resolved marks of the electric discharg e channel could be observed using this technique. Destruction effectiveness was examined for various experimental conditions. The volume of the rock d estroyed in a shot and the energy consumption in the destruction process ar e dependent on the generator voltage. The distance between electrodes has t he optimum value for a given voltage.