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

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Details

Original languageEnglish
Title of host publicationRock Mechanics for Natural Resources and Infrastructure Development - Full Papers
Subtitle of host publicationProceedings of the 14th International Congress on Rock Mechanics and Rock Engineering (ISRM 2019), September 13-18, 2019, Foz do Iguassu, Brazil
PublisherCRC Press
Pages2547-2553
Number of pages7
ISBN (Electronic)9780367823177
ISBN (Print)9780367422844
DOIs
Publication statusPublished - 2020
Publication typeA4 Article in a conference publication
EventInternational Congress on Rock Mechanics and Rock Engineering -
Duration: 1 Jan 1900 → …

Publication series

NameProceedings in Earth and geosciences
Volume6
ISSN (Print)2639-7749
ISSN (Electronic)2639-7757

Conference

ConferenceInternational Congress on Rock Mechanics and Rock Engineering
Abbreviated titleISRM
Period1/01/00 → …

Abstract

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.

Publication forum classification

Field of science, Statistics Finland