Numerical spalling assessment methods in crystalline rock during the design of ONKALO rock characterization facility

Topias Siren; Daniele Martinelli; Lauri Uotinen; Guido Nuijten; Riitta Lehmusjärvi

Numerical spalling assessment methods in crystalline rock during the design of ONKALO rock characterization facility

Topias Siren, Daniele Martinelli, Lauri Uotinen, Guido Nuijten, Riitta Lehmusjärvi

Not published at Aalto University

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

Abstract

ONKALO is a rock characterisation facility for future geological nuclear waste disposal purposes. The excavation of ONKALO is currently at the bottom level, at around 430 metres from ground level. At these depths, it is important to be able to predict the extent and probability of rock spalling. When secondary stresses at the excavation boundary exceed the rock mass strength, a brittle failure occurs that is often called “spalling”. The spalling phenomenon occurs as a strong compressive pressure induces crack growth behind the excavated surface and buckling of thin rock slabs. In this environment spalling is an event that can create problems, not so much for the overall stability of all of the excavations, but rather in particular areas that can cause unnecessary and unintended over-excavations and hazards.

Original language	English
Title of host publication	World Tunnel Congress 2011
Subtitle of host publication	Underground spaces in the service of a sustainable society
Number of pages	8
Publication status	Published - 22 May 2010
MoE publication type	A4 Conference publication
Event	World Tunnel Congress - Finlandia Hall, Helsinki, Finland Duration: 21 May 2010 → 26 May 2010

Conference

Conference	World Tunnel Congress
Abbreviated title	WTC
Country/Territory	Finland
City	Helsinki
Period	21/05/2010 → 26/05/2010

Cite this

@inproceedings{4e36b22654fb4aef8632a1154841a747,

title = "Numerical spalling assessment methods in crystalline rock during the design of ONKALO rock characterization facility",

abstract = "ONKALO is a rock characterisation facility for future geological nuclear waste disposal purposes. The excavation of ONKALO is currently at the bottom level, at around 430 metres from ground level. At these depths, it is important to be able to predict the extent and probability of rock spalling. When secondary stresses at the excavation boundary exceed the rock mass strength, a brittle failure occurs that is often called “spalling”. The spalling phenomenon occurs as a strong compressive pressure induces crack growth behind the excavated surface and buckling of thin rock slabs. In this environment spalling is an event that can create problems, not so much for the overall stability of all of the excavations, but rather in particular areas that can cause unnecessary and unintended over-excavations and hazards.",

author = "Topias Siren and Daniele Martinelli and Lauri Uotinen and Guido Nuijten and Riitta Lehmusj{\"a}rvi",

year = "2010",

month = may,

day = "22",

language = "English",

booktitle = "World Tunnel Congress 2011",

note = "World Tunnel Congress, WTC ; Conference date: 21-05-2010 Through 26-05-2010",

}

Numerical spalling assessment methods in crystalline rock during the design of ONKALO rock characterization facility. / Siren, Topias; Martinelli, Daniele; Uotinen, Lauri et al.
World Tunnel Congress 2011: Underground spaces in the service of a sustainable society. 2010.

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

TY - GEN

T1 - Numerical spalling assessment methods in crystalline rock during the design of ONKALO rock characterization facility

AU - Siren, Topias

AU - Martinelli, Daniele

AU - Uotinen, Lauri

AU - Nuijten, Guido

AU - Lehmusjärvi, Riitta

PY - 2010/5/22

Y1 - 2010/5/22

N2 - ONKALO is a rock characterisation facility for future geological nuclear waste disposal purposes. The excavation of ONKALO is currently at the bottom level, at around 430 metres from ground level. At these depths, it is important to be able to predict the extent and probability of rock spalling. When secondary stresses at the excavation boundary exceed the rock mass strength, a brittle failure occurs that is often called “spalling”. The spalling phenomenon occurs as a strong compressive pressure induces crack growth behind the excavated surface and buckling of thin rock slabs. In this environment spalling is an event that can create problems, not so much for the overall stability of all of the excavations, but rather in particular areas that can cause unnecessary and unintended over-excavations and hazards.

AB - ONKALO is a rock characterisation facility for future geological nuclear waste disposal purposes. The excavation of ONKALO is currently at the bottom level, at around 430 metres from ground level. At these depths, it is important to be able to predict the extent and probability of rock spalling. When secondary stresses at the excavation boundary exceed the rock mass strength, a brittle failure occurs that is often called “spalling”. The spalling phenomenon occurs as a strong compressive pressure induces crack growth behind the excavated surface and buckling of thin rock slabs. In this environment spalling is an event that can create problems, not so much for the overall stability of all of the excavations, but rather in particular areas that can cause unnecessary and unintended over-excavations and hazards.

M3 - Conference article in proceedings

BT - World Tunnel Congress 2011

T2 - World Tunnel Congress

Y2 - 21 May 2010 through 26 May 2010

ER -

Numerical spalling assessment methods in crystalline rock during the design of ONKALO rock characterization facility

Abstract

Conference

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