The internal failure of rock samples subjected to pulsed water jet impacts

Dehkhoda, Sevda and Hood, Michael (2014) The internal failure of rock samples subjected to pulsed water jet impacts. International Journal of Rock Mechanics and Mining Sciences, 66 91-96. doi:10.1016/j.ijrmms.2013.12.021


Author Dehkhoda, Sevda
Hood, Michael
Title The internal failure of rock samples subjected to pulsed water jet impacts
Journal name International Journal of Rock Mechanics and Mining Sciences   Check publisher's open access policy
ISSN 1365-1609
1873-4545
Publication date 2014-02
Year available 2014
Sub-type Article (original research)
DOI 10.1016/j.ijrmms.2013.12.021
Open Access Status
Volume 66
Start page 91
End page 96
Total pages 6
Place of publication Kidlington, Oxford, United Kingdom
Publisher Pergamon
Collection year 2015
Language eng
Abstract The capacity of pulsed water jets for creating internal breakdown within a rock target was the subject of this investigation. The resultant, internal damage is defined as an increase in micro-crack density within the rock samples. It is attributed to the occurrence of a fatigue phenomenon resulting from the periodic impacts of high-velocity water-pulses and from the interaction of the induced stress-waves within the target material. This paper reports an investigation into the extent to which fatigue damage occurred in rocks that were subjected to pulsed, water jet impacts. For this purpose, the wave-attenuation capacity of rock samples, before and after being subjected to a pulsed water jet, was measured and the relative disparity between these two figures was then utilised as a measure of the potency of the pulsed water jets in producing an internal breakdown within the rock targets. The results indicated and confirmed the occurrence of internal damage in tested marble and granite samples. The pulse lengths and the pulsation frequencies of the water jets were found to cooperate in developing the internal damage and, depending on the rock type, one played a more significant role than the other.
Keyword Internal failure
Micro-crack density
Pulsation frequency
Pulse length
Pulsed water jet
Rock breakage
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mechanical & Mining Engineering Publications
Official 2015 Collection
 
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Citation counts: TR Web of Science Citation Count  Cited 8 times in Thomson Reuters Web of Science Article | Citations
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