Abstract
The high magnitude of in situ geostress under deep underground conditions and the intermediate principal stress under complex stress conditions have a significant influence on the static or dynamic mechanical behavior and strength characteristics of intact rock material. The constitutive relationship for quasi-brittle materials (e.g., intact rock or concrete) subjected to large strains, high strain rates, high pressures, and complex stress states was investigated, but the mechanical behavior and strength characteristics for rock under high pressures and complex stress states have not yet been elucidated. This study mainly focuses on constitutive modeling and theoretical prediction of the dynamic mechanical behavior and strength characteristics for rock under high dynamic pressures and complex stress states. A damaged elastoplastic constitutive model for intact rock is established in this study by taking the influence of a high strain rate, high pressure, and complex stress state into account. The failure mechanism of deeply buried rock engineering under high in situ stress and an additional impact pressure from a high-velocity underground impact was analyzed in this paper. The influence of the high pressure and intermediate principal stress on the quasi-static or dynamic mechanical behavior and strength characteristics of the deeply buried rock was investigated under a complex stress state.
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The research described in this paper was funded by the National Natural Science Foundation of China (No. 51979225, 51722907) and the Fundamental Research Funds for the Central Universities Project (No. 300102268202).
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This article is part of the Topical Collection on Geological Modeling and Geospatial Data Analysis
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Ma, Z., Dang, F., Li, Y. et al. Influence of geostress field on dynamic mechanical behavior of intact rock. Arab J Geosci 14, 78 (2021). https://doi.org/10.1007/s12517-020-06313-7
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DOI: https://doi.org/10.1007/s12517-020-06313-7