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Numerical modelling of thermal drilling of rock by heating-cooling cycle

Tutkimustuotosvertaisarvioitu

Yksityiskohdat

AlkuperäiskieliEnglanti
OtsikkoRock Mechanics for Natural Resources and Infrastructure Development - Full Papers
AlaotsikkoProceedings of the 14th International Congress on Rock Mechanics and Rock Engineering (ISRM 2019), September 13-18, 2019, Foz do Iguassu, Brazil
KustantajaCRC Press
Sivut2547-2553
Sivumäärä7
ISBN (elektroninen)9780367823177
ISBN (painettu)9780367422844
DOI - pysyväislinkit
TilaJulkaistu - 2020
OKM-julkaisutyyppiA4 Artikkeli konferenssijulkaisussa
TapahtumaInternational Congress on Rock Mechanics and Rock Engineering -
Kesto: 1 tammikuuta 1900 → …

Julkaisusarja

NimiProceedings in Earth and geosciences
Vuosikerta6
ISSN (painettu)2639-7749
ISSN (elektroninen)2639-7757

Conference

ConferenceInternational Congress on Rock Mechanics and Rock Engineering
LyhennettäISRM
Ajanjakso1/01/00 → …

Tiivistelmä

This paper presents a numerical study on thermal drilling of rock. In this context, thermal drilling refers to the disintegration of rock surface material when exposed to a heat shock consisting of an intensive external thermal flux and consequent rapid cooling. An embedded discontinuity finite element approach is chosen for modelling the rock cracking due to the heating-cooling cycle. The underlining uncoupled thermo-mechanical problem is solved by an
explicit time stepping scheme with mass scaling to increase the time critical time step. Numerical simulation of a heterogeneous rock sample under axisymmetric conditions demonstrate that the drilling by a rapid heating-cooling cycle is a feasible method at conditions where the bulk rock is at elevated temperatures.

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