Numerical study on the effect of confinement on thermal spallation drilling of hard rock

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Abstract

This paper presents a numerical study on the effect of confining pressure (down-to-hole pressure) on the performance of the thermal jet drilling on rock. For this end, a numerical method including a viscoplastic-damage model for rock and an explicit scheme for solving the governing thermo-mechanical problem, which is assumed uncoupled. Moreover, rock heterogeneity, which facilitates the thermal spallation phenomenon, is taken into account. Numerical simulations under axisymmetric conditions demonstrate that the efficiency of thermal spallation based drilling is reduces drastically due to confinement.
Original languageEnglish
Title of host publication International Conference CIBv2019 Civil Engineering and Building Services 1-2 November 2019, Brașov, Romania
PublisherIOP Publishing Ltd.
Number of pages8
Volume789
DOIs
Publication statusPublished - 2020
Publication typeA4 Article in a conference publication
Event International Conference Civil Engineering and Building Services -
Duration: 1 Nov 20192 Nov 2019

Publication series

NameIOP Conference Series: Materials Science and Engineering
Volume789
ISSN (Electronic)1757-899X

Conference

Conference International Conference Civil Engineering and Building Services
Period1/11/192/11/19

Publication forum classification

  • Publication forum level 1

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