A comparative simulation study of coupled THM processes and their effect on fractured rock permeability around nuclear waste repositories

被引：49

作者：

Rutqvist, Jonny ^{[1
]}

Barr, Deborah ^{[2
]}

Birkholzer, Jens T. ^{[1
]}

Fujisaki, Kiyoshi ^{[3
]}

Kolditz, Olaf ^{[4
]}

Liu, Quan-Sheng ^{[5
]}

Fujita, Tomoo ^{[3
]}

Wang, Wenqing ^{[4
]}

Zhang, Cheng-Yuan ^{[5
]}

机构：

[1] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Earth Sci, Berkeley, CA 94720 USA

[2] US DOE, Off Repository Dev, Las Vegas, NV USA

[3] Japan Atom Energy Agcy, Tokai, Ibaraki, Japan

[4] UFZ Helmholtz Ctr Environm Res, Leipzig, Germany

[5] Chinese Acad Sci, Wuhan, Peoples R China

来源：

ENVIRONMENTAL GEOLOGY | 2009年 / 57卷 / 06期

关键词：

Coupled processes; Nuclear waste repository; Temperature; Stress; Permeability; DECOVALEX-III PROJECT; NEAR-FIELD SAFETY; MECHANICAL-BEHAVIOR; YUCCA MOUNTAIN; KAMAISHI MINE; HEATER TEST; FLUID-FLOW; PREDICTIONS; BMT1; FORMULATION;

D O I：

10.1007/s00254-008-1552-1

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

This paper presents an international, multiple-code, simulation study of coupled thermal, hydrological, and mechanical (THM) processes and their effect on permeability and fluid flow in fractured rock around heated underground nuclear waste emplacement drifts. Simulations were conducted considering two types of repository settings (1) open emplacement drifts in relatively shallow unsaturated volcanic rock, and (2) backfilled emplacement drifts in deeper saturated crystalline rock. The results showed that for the two assumed repository settings, the dominant mechanism of changes in rock permeability was thermal-mechanically induced closure (reduced aperture) of vertical fractures, caused by thermal stress resulting from repository-wide heating of the rock mass. The magnitude of thermal-mechanically induced changes in permeability was more substantial in the case of an emplacement drift located in a relatively shallow, low-stress environment where the rock is more compliant, allowing more substantial fracture closure during thermal stressing. However, in both of the assumed repository settings in this study, the thermal-mechanically induced changes in permeability caused relatively small changes in the flow field, with most changes occurring in the vicinity of the emplacement drifts.

引用

页码：1347 / 1360

页数：14

共 35 条

[11]

Jaeger JC., 1979, Fundamentals of rock mechanics

[12]

KOLDITZ O, 2003, ROCKFLOW THEORY USER

[13]

LIU Q, 2006, P GEOPROC2006 INT S, P220

[14]

LIU X, 2006, P GEOPROC2006 INT S, P234

[15] Numerical study of the THM effects on the near-field safety of a hypothetical nuclear waste repository - BMT1 of the DECOVALEX III project. Part 2: Effects of THM coupling in continuous and homogeneous rocks [J].

Millard, A ;

Rejeb, A ;

Chijimatsu, M ;

Jing, L ;

De Jonge, J ;

Kohlmeier, M ;

Nguyen, TS ;

Rutqvist, J ;

Souley, M ;

Sugita, Y .

INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES, 2005, 42 (5-6) :731-744

[16] Chemically and mechanically mediated influences on the transport and mechanical characteristics of rock fractures [J].

Min, Ki-Bok ;

Rutqvist, Jonny ;

Elsworth, Derek .

INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES, 2009, 46 (01) :80-89

[17] Hydro-mechanical response of a fractured granitic rock mass to excavation of a test pit - the Kamaishi Mine experiment in Japan [J].

Nguyen, TS ;

Borgesson, L ;

Chijimatsu, M ;

Rutqvist, J ;

Fujita, T ;

Hernelind, J ;

Kobayashi, A ;

Ohnishi, Y ;

Tanaka, M ;

Jing, L .

INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES, 2001, 38 (01) :79-94

[18]

NOORISHAD J, 1996, DEV GEOTECH ENG, V79, P93

[19]

OHNISHI Y, 1996, DEV GEOTECH ENG, V79, P545

[20]

OHNISHI Y, 1987, COUPLED PROCESSES AS, P551

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