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Cristin-resultat-ID:
1340116
Sist endret:
28. oktober 2016, 03:03
Resultat
Faglig foredrag
2015
Influence of indexation and impact energy on bit/rock interface law in percussive drilling: an experimental study
Marion Fourmeau
Depouhon Alexandre
Alexandre Kane
Nguyen-Hieu Hoang
og
Emmanuel Detournay
Presentasjon
Presentasjon
Navn på arrangementet: 49th US Rock Mechanics / Geomechanics Symposium
Sted: San Francisco
Dato fra:
28. juni 2015
Dato til:
1. juli 2015
Arrangør:
Arrangørnavn: ARMA
Om resultatet
Om resultatet
Faglig foredrag
Publiseringsår: 2015
Beskrivelse
Beskrivelse
Engelsk
Tittel
Influence of indexation and impact energy on bit/rock interface law in percussive drilling: an experimental study
Sammendrag
This paper presents the results of a laboratory study aimed at assessing the influence of indexation (the ratio of the bit angular velocity over the activation frequency) and impact energy on the performance of percussive drilling. A block of Kuru grey granite is subjected to sequential impacts with a Ø33mm seven-button drill bit driven by a drop machine. The force versus displacement curve is obtained through a strain gauge located on the impacting tup and the volume of removed rock is captured by taking a rubber specimen of the drilling bottom-hole, cleaned by air-flushing, after each impact. These two measurements enable to investigate the link between the penetration of the bit after each impact and the average rate of penetration of the bit after multiple impacts. Understanding and quantifying the dependence of these relationships on indexation and impact energy will lead to the formulation of more realistic bit/rock interface laws that implicitly account for repeated impacts of the bit on the rock.
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fullstendig beskrivelse
Bidragsytere
Bidragsytere
Marion Fourmeau
Forfatter
ved Materialer og nanoteknologi ved SINTEF AS
Depouhon Alexandre
Forfatter
Pascal-Alexandre Saidou Kane
Bidragsyterens navn vises på dette resultatet som Alexandre Kane
Forfatter
Nguyen-Hieu Hoang
Forfatter
ved Materialer og nanoteknologi ved SINTEF AS
Emmanuel Detournay
Forfatter
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