Acoustic emission in host-rock material for radioactive waste disposal: Comparison between clay and rock salt

被引：0

作者：

Lavrov A. ^{[2
]}

Vervoort A. ^{[1
]}

Filimonov Y. ^{[3
]}

Wevers M. ^{[4
]}

Mertens J. ^{[5
]}

机构：

[1] Catholic University of Leuven, Faculty of Applied Sciences, Department of Civil Engineering, Leuven 3001

[2] Moscow State Mining University, Physical/Engineering Department

[3] Strength Laboratory, Podzemgazprom Ltd, Moscow

[4] Catholic University of Leuven, Faculty of Applied Sciences, Dept. of Metallurgy/Materials Eng.

[5] Catholic University of Leuven, Faculty of Sciences, Department of Geography and Geology

来源：

Bulletin of Engineering Geology and the Environment | 2002年 / 61卷 / 4期

关键词：

Acoustic emission; Clay; Cracks; Radioactive waste disposal; Rock salt; Uniaxial compression;

D O I：

10.1007/s10064-002-0160-7

中图分类号：

学科分类号：

摘要：

The use of clay masses for radioactive waste disposal requires a comprehensive analysis of fracture processes in clay. Acoustic emission (AE) was used to obtain a better insight into damage evolution during uniaxial loading of Boom Clay specimens. A comparison of AE in clay and rock salt shows a much lower AE activity in clay. This, together with the higher attenuation, would inhibit the use of the AE technique for large-scale in-situ monitoring in clay masses. Cyclic uniaxial tests showed that, similarly to rock salt, clay exhibits a very well-pronounced Kaiser effect in AE with Felicity ratios around unity. The Kaiser effect takes place at different loading stages (before and at the flow limit) and, during reloading, it coincides with the deformation curve inflection. Further research is required to study the applicability of the Felicity ratio as a measure of the intensity of healing processes in clay.

引用

页码：379 / 387

页数：8

共 27 条

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