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Bulletin of Engineering Geology and the Environment

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09.11.2017 | Original Paper

Weakening effects of the presence of water on the brittleness of hard sandstone

verfasst von: Guoqing Chen, Tianbin Li, Wei Wang, Zhenfei Zhu, Ziquan Chen, Ouling Tang

Erschienen in: Bulletin of Engineering Geology and the Environment | Ausgabe 3/2019

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Abstract

The weakening effects of increasing the water content in rocks have been studied extensively in a wide variety of rock types over the past few decades. High energy release is typically characteristic of rock burst hazards. However, few studies have investigated the mechanism of water involved in rock bursts from the perspective of energy distribution based on the water content. Therefore, in this study we investigated the evolution of microcracks in hard sandstone determined from triaxial tests combined with an acoustic emission analysis for different water contents and confining pressures. Then, the weakening effects of water on the brittleness of the rock were studied from an energy viewpoint. The study shows that the capacity of the storage energy of hard rock decreases due to the dissipation of internal elastic energy in the compression stage in the presence of water. These results revealed the mechanical and energetic mechanisms that caused the weakening effects induced by water on rock burst and can contribute to design and construction improvements in tunnel engineering.

Vorheriger Artikel Estimating compressive and flexural strength of travertines with respect to laminae-orientation by geomechanical properties

Nächster Artikel Micro/macro physical and mechanical variation of red sandstone subjected to cyclic heating and cooling: an experimental study

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Titel: Weakening effects of the presence of water on the brittleness of hard sandstone
verfasst von: Guoqing Chen
Tianbin Li
Wei Wang
Zhenfei Zhu
Ziquan Chen
Ouling Tang
Publikationsdatum: 09.11.2017
Verlag: Springer Berlin Heidelberg
Erschienen in: Bulletin of Engineering Geology and the Environment / Ausgabe 3/2019
Print ISSN: 1435-9529
Elektronische ISSN: 1435-9537
DOI: https://doi.org/10.1007/s10064-017-1184-3

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