The hydromechanical behaviour of the Boom Clay observed during excavation of the connecting gallery at Mol site

Xiang Ling Li; Wim Bastiaens; Frédéric Bernier

The hydromechanical behaviour of the Boom Clay observed during excavation of the connecting gallery at Mol site

Xiang Ling Li, Wim Bastiaens, Frédéric Bernier

Research output › peer-review

Abstract

Boom Clay formation has been selected as a potential host rock for the geological disposal of radioactive wastes in Belgium. An Underground Research Facility (URF) in Boom Clay formation at a depth of about 223m at Mol site was built to investigate and demonstrate the feasibility of the disposal concepts and to provide reliable data on the performance of Boom Clay as a host rock. The URF was extended by sinking a second shaft and excavating a connecting gallery that provided a unique and original opportunity to monitor the hydromechanical responses of the Boom Clay ahead of the excavation front thanks to the instrumentation installed in-situ (CLIPEX program). The most important observation is the very extended excavation dis-turbed zone that cannot be replicated by a classical elasto-plastic constitutive law, which gave however reli-able predictions of instantaneous convergence in the near field. Further investigation is necessary to explain this extended disturbed zone, especially variation of pore water pressure in the far field.

Original language	English
Title of host publication	EUROCK 2006, Multiphysics coupling and long term behaviour in rock mechanics;
Place of Publication	London, British Indian Ocean Territory
Pages	467-472
Volume	1
State	Published - 12 May 2006
Event	EUROCK 2006, Multiphysics coupling and long term behaviour in rock mechanics; - Belgian Rock mechanics society, Liège Duration: 9 May 2006 → 12 May 2006

Publication series

Name	Proceedings and Monographs in Engineering, Water and Earthe Sciences

Conference

Conference	EUROCK 2006, Multiphysics coupling and long term behaviour in rock mechanics;
Country/Territory	Belgium
City	Liège
Period	2006-05-09 → 2006-05-12

Cite this

Li, Xiang Ling ; Bastiaens, Wim ; Bernier, Frédéric. / The hydromechanical behaviour of the Boom Clay observed during excavation of the connecting gallery at Mol site. EUROCK 2006, Multiphysics coupling and long term behaviour in rock mechanics;. Vol. 1 London, British Indian Ocean Territory, 2006. pp. 467-472 (Proceedings and Monographs in Engineering, Water and Earthe Sciences).

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title = "The hydromechanical behaviour of the Boom Clay observed during excavation of the connecting gallery at Mol site",

abstract = "Boom Clay formation has been selected as a potential host rock for the geological disposal of radioactive wastes in Belgium. An Underground Research Facility (URF) in Boom Clay formation at a depth of about 223m at Mol site was built to investigate and demonstrate the feasibility of the disposal concepts and to provide reliable data on the performance of Boom Clay as a host rock. The URF was extended by sinking a second shaft and excavating a connecting gallery that provided a unique and original opportunity to monitor the hydromechanical responses of the Boom Clay ahead of the excavation front thanks to the instrumentation installed in-situ (CLIPEX program). The most important observation is the very extended excavation dis-turbed zone that cannot be replicated by a classical elasto-plastic constitutive law, which gave however reli-able predictions of instantaneous convergence in the near field. Further investigation is necessary to explain this extended disturbed zone, especially variation of pore water pressure in the far field.",

keywords = "Boom clay, geological disposal, excavation disturbed zone, near field, far field, constitutive law",

author = "Li, {Xiang Ling} and Wim Bastiaens and Fr{\'e}d{\'e}ric Bernier",

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Li, XL, Bastiaens, W & Bernier, F 2006, The hydromechanical behaviour of the Boom Clay observed during excavation of the connecting gallery at Mol site. in EUROCK 2006, Multiphysics coupling and long term behaviour in rock mechanics;. vol. 1, Proceedings and Monographs in Engineering, Water and Earthe Sciences, London, British Indian Ocean Territory, pp. 467-472, EUROCK 2006, Multiphysics coupling and long term behaviour in rock mechanics;, Liège, Belgium, 2006-05-09.

The hydromechanical behaviour of the Boom Clay observed during excavation of the connecting gallery at Mol site. / Li, Xiang Ling; Bastiaens, Wim; Bernier, Frédéric.

EUROCK 2006, Multiphysics coupling and long term behaviour in rock mechanics;. Vol. 1 London, British Indian Ocean Territory, 2006. p. 467-472 (Proceedings and Monographs in Engineering, Water and Earthe Sciences).

Research output › peer-review

TY - GEN

T1 - The hydromechanical behaviour of the Boom Clay observed during excavation of the connecting gallery at Mol site

AU - Li, Xiang Ling

AU - Bastiaens, Wim

AU - Bernier, Frédéric

N1 - Score = 1

PY - 2006/5/12

Y1 - 2006/5/12

N2 - Boom Clay formation has been selected as a potential host rock for the geological disposal of radioactive wastes in Belgium. An Underground Research Facility (URF) in Boom Clay formation at a depth of about 223m at Mol site was built to investigate and demonstrate the feasibility of the disposal concepts and to provide reliable data on the performance of Boom Clay as a host rock. The URF was extended by sinking a second shaft and excavating a connecting gallery that provided a unique and original opportunity to monitor the hydromechanical responses of the Boom Clay ahead of the excavation front thanks to the instrumentation installed in-situ (CLIPEX program). The most important observation is the very extended excavation dis-turbed zone that cannot be replicated by a classical elasto-plastic constitutive law, which gave however reli-able predictions of instantaneous convergence in the near field. Further investigation is necessary to explain this extended disturbed zone, especially variation of pore water pressure in the far field.

AB - Boom Clay formation has been selected as a potential host rock for the geological disposal of radioactive wastes in Belgium. An Underground Research Facility (URF) in Boom Clay formation at a depth of about 223m at Mol site was built to investigate and demonstrate the feasibility of the disposal concepts and to provide reliable data on the performance of Boom Clay as a host rock. The URF was extended by sinking a second shaft and excavating a connecting gallery that provided a unique and original opportunity to monitor the hydromechanical responses of the Boom Clay ahead of the excavation front thanks to the instrumentation installed in-situ (CLIPEX program). The most important observation is the very extended excavation dis-turbed zone that cannot be replicated by a classical elasto-plastic constitutive law, which gave however reli-able predictions of instantaneous convergence in the near field. Further investigation is necessary to explain this extended disturbed zone, especially variation of pore water pressure in the far field.

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KW - geological disposal

KW - excavation disturbed zone

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KW - far field

KW - constitutive law

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