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Research on the Damage-Catastrophe Mechanism of a Tower-Column Unstable Rock Mass with Compressed-Fracture Slumping Mode Under Multi-factor Couplings

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Abstract

A compressed-fracture slumping mode of the tower-column unstable rock mass is unusual, and the damage-catastrophe mechanism is a critical scientific issue in the mountainous disaster. Taking Zengziyan W12# unstable rock mass collapse in Jinfo mountain, Nanchuan District of Chongqing Municipality in China as an example, a multi-factor coupled damage-catastrophe geomechanical model consisted of freezing–thawing, dissolution, load, and the water-weakening effect was built. A damage constitutive model and a total damage evolution analytical formula were attained based on the equivalent strain principal, and the improved water-weakening function was easier to access in the indoor test. We generalize the geomechanical model into an equivalent spring model, and the energy balance theory acquires the damage fold-catastrophe model and gains the failure criterion of the compressed-fracture slumping mode and an eigenvalue expression of the critical mutation displacement. The theoretical catastrophic displacement value fits the real displacement inflection point value basically and the damage-catastrophe model is reasonable. The research can predict the damage evolution process and the critical catastrophic displacement eigenvalue of the compressed-fracture slumping mode of a tower-column unstable rock mass and provide theoretical support for the geo-disaster prevention in the mountainous zone.

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The datasets generated during and/or analyzed during the current study are available from the corresponding author on reasonable request.

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Funding

This work was financially supported by the National Natural Science Foundation of China (Grant Nos. 51378521, 51678097).

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Correspondence to Fuchuan Zhou.

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Zhou, F., Tang, H., Chen, S. et al. Research on the Damage-Catastrophe Mechanism of a Tower-Column Unstable Rock Mass with Compressed-Fracture Slumping Mode Under Multi-factor Couplings. Geotech Geol Eng 41, 135–151 (2023). https://doi.org/10.1007/s10706-022-02268-6

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  • DOI: https://doi.org/10.1007/s10706-022-02268-6

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