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Research on the collapse process of a thick-layer dangerous rock on the reservoir bank

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Abstract

The evolution of the rocky reservoir bank is complex and difficult to predict because there is a lack of connection between changing mechanical states and reservoir water levels. Here, we propose an analytical method to study the evolution process of thick-layer dangerous rock masses (TDRM) on reservoir banks. This new method involves damage evolution and numerical simulation. Through this new method, the non-linear accelerated mechanical state of the TDRM can be continuously tracked, and the relationship between the changing water level and the progressive failure can be quantified. A dynamic collapse analysis can be carried out using parameters obtained from a predictive model. In this paper, the Jianchuandong dangerous rock mass (JDRM) located in the Three Gorges Reservoir area is selected as a case study to verify the new method. The predictive model was highly consistent with long-term monitoring and observational data. In addition, the failure process obtained by numerical simulation was identical to the typical dynamic characteristics of TDRM. Therefore, the effectiveness of this new method has been proven, and the method can be used to predict the evolution of TDRM on other reservoir banks.

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Funding

This study was supported by the National Key R&D Program of China (2019YFC1509605), the China Postdoctoral Science Foundation funded project (2021M700608) and Natural Science Foundation of Chongqing, China (cstc2021jcyj-bsh0047).

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Authors and Affiliations

  1. School of Civil Engineering, Chongqing University, 400045, Chongqing, China

    Yueping Yin, Luqi Wang & Wengang Zhang

  2. China Institute of Geological Environment Monitoring, 100081, Beijing, China

    Yueping Yin

  3. Chongqing 208 Geo-Environmental Research Institute Co. Ltd, 400700, Chongqing, China

    Zhihua Zhang

  4. Central South China Innovation Center for Geosciences, Wuhan Centre of China Geological Survey, Hubei, 430205, Wuhan, China

    Zhenwei Dai

Authors
  1. Yueping Yin
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  2. Luqi Wang
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  3. Wengang Zhang
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  4. Zhihua Zhang
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  5. Zhenwei Dai
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Corresponding author

Correspondence to Luqi Wang.

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Yin, Y., Wang, L., Zhang, W. et al. Research on the collapse process of a thick-layer dangerous rock on the reservoir bank. Bull Eng Geol Environ 81, 109 (2022). https://doi.org/10.1007/s10064-022-02618-x

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  • DOI: https://doi.org/10.1007/s10064-022-02618-x

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