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Study on Local Yielding Effect and Energy Evolution Law of Deep Roadway

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Abstract

In order to reduce the adverse impact of rockburst disaster on engineering construction to a greater extent, we proposes the concept of non-uniform thin-walled stress concentration based on the principle of rockburst energy. The analysis shows that rockburst prone location is the place with stress concentrations and large stress gradients. Based on the ventilation roadway of 11,071 working face in Zhaogu No. 2 Mine, the three-dimensional finite difference software is redeveloped by FISH language programming. The energy evolution law of deep underground cavern under dynamic load, the influence on the failure form of cavern and dynamic response law of reasonable support yielding spacing of steel frame are systematically studied from the perspective of local yielding of surrounding rock. The research shows that the local yielding effect of surrounding rock reduces the disturbance times of excavation to surrounding rock, and the shock wave energy is absorbed and reflected at the working face, resulting in the weakening of dynamic response and the reduction of dynamic load. After the excavation of the cavern, the surrounding rock is firstly subjected to tensile failure at the initial stage of failure and then to shear failure. The residual elastic strain energy is released by ejection and the location where the rockburst occurs is directly related to the direction of the maximum principal stress of rock mass.

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Acknowledgements

This study was financially supported by the National Natural Science Foundation of China (Grant Nos.: 51474097, U1810203).

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Authors and Affiliations

  1. School of Business Administration, Henan Polytechnic University, Jiaozuo, 454000, Henan, China

    Zhijia Wang

  2. School of Civil Engineering, Henan Polytechnic University, Jiaozuo, 454000, Henan, China

    Wenlong Wu & Feiyue Sun

  3. China Construction Seventh Engineering Division. Corp. Ltd, Zhengzhou, 450000, Henan, China

    Weidong Sun & Pengfei Li

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  1. Zhijia Wang
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  2. Wenlong Wu
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  3. Feiyue Sun
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  4. Weidong Sun
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  5. Pengfei Li
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Correspondence to Feiyue Sun.

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Wang, Z., Wu, W., Sun, F. et al. Study on Local Yielding Effect and Energy Evolution Law of Deep Roadway. Geotech Geol Eng 40, 2569–2580 (2022). https://doi.org/10.1007/s10706-021-02046-w

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  • DOI: https://doi.org/10.1007/s10706-021-02046-w

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