NDLI: The Dynamic Fracture Process in Rocks Under High-Voltage Pulse Fragmentation

Content Provider	Springer Nature Link
Author	Cho, Sang Ho Cheong, Sang Sun Yokota, Mitsuhiro Kaneko, Katsuhiko
Copyright Year	2016
Abstract	High-voltage pulse technology has been applied to rock excavation, liberation of microfossils, drilling of rocks, oil and water stimulation, cleaning castings, and recycling products like concrete and electrical appliances. In the field of rock mechanics, research interest has focused on the use of high-voltage pulse technology for drilling and cutting rocks over the past several decades. In the use of high-voltage pulse technology for drilling and cutting rocks, it is important to understand the fragmentation mechanism in rocks subjected to high-voltage discharge pulses to improve the effectiveness of drilling and cutting technologies. The process of drilling rocks using high-voltage discharge is employed because it generates electrical breakdown inside the rocks between the anode and cathode. In this study, seven rock types and a cement paste were electrically fractured using high-voltage pulse discharge to investigate their dielectric breakdown properties. The dielectric breakdown strengths of the samples were compared with their physical and mechanical properties. The samples with dielectric fractured were scanned using a high-resolution X-ray computed tomography system to observe the fracture formation associated with mineral constituents. The fracture patterns of the rock samples were analyzed using numerical simulation for high-voltage pulse-induced fragmentation that adopts the surface traction and internal body force conditions.
Starting Page	3841
Ending Page	3853
Page Count	13
File Format	PDF
ISSN	07232632
Journal	Rock Mechanics and Rock Engineering
Volume Number	49
Issue Number	10
e-ISSN	1434453X
Language	English
Publisher	Springer Vienna
Publisher Date	2016-07-09
Publisher Place	Vienna
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	High-voltage pulse fragmentation Dielectric breakdown strength Uniaxial compressive strength Brazilian tensile strength Microfocus X-ray computed tomography Dynamic fracture process analysis Geophysics/Geodesy Civil Engineering
Content Type	Text
Resource Type	Article
Subject	Geology Geotechnical Engineering and Engineering Geology Civil and Structural Engineering

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