Numerical modelling of fracture processes in thermal shock weakened rock

Martina Pressacco; Timo Saksala

doi:10.1201/9780429462078

Numerical modelling of fracture processes in thermal shock weakened rock

Martina Pressacco, Timo Saksala

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Scientific › peer-review

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Abstract

This paper presents some preliminary results of a research project aiming at the simulation of thermal shock assisted percussive drilling. In the present study, a numerical model for transient thermal shock induced damage in rock is presented. This model includes a rock mesostructure description accounting for different mineral properties and a thermo-mechanical constitutive model based on embedded discontinuity ﬁnite elements. In the numerical simulations, the thermal shock induced damge process is ﬁrst simulated. Then the uniaxial
compression test on thermally affected numerical rock samples is carried out. The effect of thermal shock is demonstrated by comparison to uniaxial compression test simulation on intact rock. The results show that the thermal-shock assisted rock breakage is a feasible idea to be extended to percussive drilling as well.

Original language	English
Title of host publication	Geomechanics and Geodynamics of Rock Masses, Volume 1 Proceedings of the 2018 European Rock Mechanics Symposium
Editors	Vladimir Litvinenko
Publisher	CRC Press
Pages	883-888
ISBN (Electronic)	9780429867729
DOIs	https://doi.org/10.1201/9780429462078
Publication status	Published - May 2018
Publication type	A4 Article in conference proceedings
Event	European Rock Mechanics Symposium - St. Petersburg, Russian Federation Duration: 22 May 2018 → 26 May 2018

Conference

Conference	European Rock Mechanics Symposium
Country/Territory	Russian Federation
City	St. Petersburg
Period	22/05/18 → 26/05/18

Publication forum classification

Publication forum level 1

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10.1201/9780429462078

Numerical modelling of fracture processes
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title = "Numerical modelling of fracture processes in thermal shock weakened rock",

abstract = "This paper presents some preliminary results of a research project aiming at the simulation of thermal shock assisted percussive drilling. In the present study, a numerical model for transient thermal shock induced damage in rock is presented. This model includes a rock mesostructure description accounting for different mineral properties and a thermo-mechanical constitutive model based on embedded discontinuity ﬁnite elements. In the numerical simulations, the thermal shock induced damge process is ﬁrst simulated. Then the uniaxialcompression test on thermally affected numerical rock samples is carried out. The effect of thermal shock is demonstrated by comparison to uniaxial compression test simulation on intact rock. The results show that the thermal-shock assisted rock breakage is a feasible idea to be extended to percussive drilling as well.",

author = "Martina Pressacco and Timo Saksala",

year = "2018",

month = may,

doi = "10.1201/9780429462078",

language = "English",

pages = "883--888",

editor = "Litvinenko, {Vladimir }",

booktitle = "Geomechanics and Geodynamics of Rock Masses, Volume 1 Proceedings of the 2018 European Rock Mechanics Symposium",

publisher = "CRC Press",

note = "European Rock Mechanics Symposium ; Conference date: 22-05-2018 Through 26-05-2018",

}

Pressacco, M & Saksala, T 2018, Numerical modelling of fracture processes in thermal shock weakened rock. in V Litvinenko (ed.), Geomechanics and Geodynamics of Rock Masses, Volume 1 Proceedings of the 2018 European Rock Mechanics Symposium. CRC Press, pp. 883-888, European Rock Mechanics Symposium , St. Petersburg, Russian Federation, 22/05/18. https://doi.org/10.1201/9780429462078

Numerical modelling of fracture processes in thermal shock weakened rock. / Pressacco, Martina; Saksala, Timo.
Geomechanics and Geodynamics of Rock Masses, Volume 1 Proceedings of the 2018 European Rock Mechanics Symposium. ed. / Vladimir Litvinenko. CRC Press, 2018. p. 883-888.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Scientific › peer-review

TY - GEN

T1 - Numerical modelling of fracture processes in thermal shock weakened rock

AU - Pressacco, Martina

AU - Saksala, Timo

PY - 2018/5

Y1 - 2018/5

N2 - This paper presents some preliminary results of a research project aiming at the simulation of thermal shock assisted percussive drilling. In the present study, a numerical model for transient thermal shock induced damage in rock is presented. This model includes a rock mesostructure description accounting for different mineral properties and a thermo-mechanical constitutive model based on embedded discontinuity ﬁnite elements. In the numerical simulations, the thermal shock induced damge process is ﬁrst simulated. Then the uniaxialcompression test on thermally affected numerical rock samples is carried out. The effect of thermal shock is demonstrated by comparison to uniaxial compression test simulation on intact rock. The results show that the thermal-shock assisted rock breakage is a feasible idea to be extended to percussive drilling as well.

AB - This paper presents some preliminary results of a research project aiming at the simulation of thermal shock assisted percussive drilling. In the present study, a numerical model for transient thermal shock induced damage in rock is presented. This model includes a rock mesostructure description accounting for different mineral properties and a thermo-mechanical constitutive model based on embedded discontinuity ﬁnite elements. In the numerical simulations, the thermal shock induced damge process is ﬁrst simulated. Then the uniaxialcompression test on thermally affected numerical rock samples is carried out. The effect of thermal shock is demonstrated by comparison to uniaxial compression test simulation on intact rock. The results show that the thermal-shock assisted rock breakage is a feasible idea to be extended to percussive drilling as well.

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DO - 10.1201/9780429462078

M3 - Conference contribution

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BT - Geomechanics and Geodynamics of Rock Masses, Volume 1 Proceedings of the 2018 European Rock Mechanics Symposium

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PB - CRC Press

T2 - European Rock Mechanics Symposium

Y2 - 22 May 2018 through 26 May 2018

ER -

Numerical modelling of fracture processes in thermal shock weakened rock

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