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

International Journal of Coal Science & Technology

Review

Qingsheng Bai¹  Lei Wang²  Xiaojie Wang²  Cun Zhang²  Penghua Han²  Fangtian Wang³ 

[1] Institute of Geotechnics, TU Bergakademie Freiberg, Gustav-Zeuner-Straße 1, 09599, Freiberg, Germany;School of Energy and Mining Engineering, China University of Mining and Technology (Beijing), 100083, Beijing, China;School of Mines, China University of Mining and Technology, 221116, Xuzhou, China;

关键词: Water–rock interaction;    Weakening mechanism;    Water content;    Immersion time;    Wetting–drying cycles;    Microscopic methods;   

DOI  :  10.1007/s40789-023-00569-6

 received in 2022-08-04, accepted in 2023-01-16,  发布年份 2023

来源: Springer

【 摘 要 】

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.

【 授权许可】

CC BY   
© The Author(s) 2023

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