Strength weakening and its micromechanism in water–rock interaction, a short review in laboratory tests

Water–rock interaction (WRI) is a topic of interest in geology and geotechnical engineering. Many geological hazards and engineering safety problems are severe under the WRI. This study focuses on the water weakening of rock strength and its influencing factors (water content, immersion time, and we...

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Bibliographic Details
Published in:International journal of coal science & technology Vol. 10; no. 1; pp. 10 - 15
Main Authors: Zhang, Cun, Bai, Qingsheng, Han, Penghua, Wang, Lei, Wang, Xiaojie, Wang, Fangtian
Format: Journal Article
Language:English
Published: Singapore Springer Nature Singapore 01.12.2023
Springer
Springer Nature B.V
SpringerOpen
Subjects:
Acoustic emission
Acoustic emission testing
Drying
Energy
Failure
Fossil Fuels (incl. Carbon Capture)
Fractals
Geological hazards
Geotechnical Engineering & Applied Earth Sciences
Geotechnology
Immersion time
Infrared radiation
Laboratories
Laboratory tests
Load
Microscopic methods
Mineral composition
Mineral Resources
Mines
Mining
Mining engineering
Moisture content
Review
Rocks
Safety engineering
Shear tests
Tensile strength
Water content
Water–rock interaction
Weakening mechanism
Wetting–drying cycles
China
Weakening mechanism
Microscopic methods
Water–rock interaction
Water content
Immersion time
Wetting–drying cycles
ISSN:2095-8293, 2198-7823
Online Access:Get full text
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Summary:Water–rock interaction (WRI) is a topic of interest in geology and geotechnical engineering. Many geological hazards and engineering safety problems are severe under the WRI. This study focuses on the water weakening of rock strength and its influencing factors (water content, immersion time, and wetting–drying cycles). The strength of the rock mass decreases to varying degrees with water content, immersion time, and wetting–drying cycles depending on the rock mass type and mineral composition. The corresponding acoustic emission count and intensity and infrared radiation intensity also weaken accordingly. WRI enhances the plasticity of rock mass and reduces its brittleness. Various microscopic methods for studying the pore characterization and weakening mechanism of the WRI were compared and analyzed. Various methods should be adopted to study the pore evolution of WRI comprehensively. Microscopic methods are used to study the weakening mechanism of WRI. In future work, the mechanical parameters of rocks weakened under long-term water immersion (over years) should be considered, and more attention should be paid to how the laboratory scale is applied to the engineering scale. Highlights This paper reviews the water weakening on rock strength and its influencing factors. Various microscopic methods for studying the pore characterization and weakening mechanism of WRI are compared and analyzed. We study the weakening mechanism of WRIs using microscopic methods. Future works on WRI laboratory tests were suggested.
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ISSN:2095-8293
2198-7823
DOI:10.1007/s40789-023-00569-6