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Simulation Study on Deformation and Fracture Law of Surrounding Rock of Deep Chamber by Section Size

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Abstract

In order to solve the problem of serious failure of surrounding rocks for large or super-large section chambers in deep coal mines, we got the variations of plastic zone range, stress and deformation of surrounding rocks by numerical simulation. First, we took the gangue transfer chamber of Longgu coal mine as the background. And the chamber models with different section sizes were established by using the numerical simulation software FLAC3D. The deformation and failure laws of surrounding rocks for different chamber section sizes were revealed. The results showed that the plastic zone range, stress, and deformation of surrounding rocks increased in varying degrees with the increase of section size. Then, the empirical equations were obtained by fitting the plastic zone, stress and deformation of surrounding rocks with the section size of the chamber. It was found that these parameters increased mainly in the form of quadratic functions. This research revealed the variations of stress, deformation and failure of surrounding rocks of deep chamber with the size of section, which could provide some references for design and control of chamber.

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Acknowledgements

This study is supported by the National Key R&D Program of China (2018YFC0604703), the National Natural Science Foundation of China (51804181, 51874190 and 51574154), the Major Program of Shandong Province Natural Science Foundation (ZR2018ZA0603), the Shandong Province Natural Science Fund (ZR2018QEE002), and Tai’shan Scholar Engineering Construction Fund of Shandong Province of China.

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Authors and Affiliations

  1. State Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao, 266590, China

    Shilin Song, Xuesheng Liu, Yunliang Tan, Deyuan Fan & Jianguo Ning

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  1. Shilin Song
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  2. Xuesheng Liu
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  3. Yunliang Tan
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  4. Deyuan Fan
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  5. Jianguo Ning
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Correspondence to Xuesheng Liu.

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Song, S., Liu, X., Tan, Y. et al. Simulation Study on Deformation and Fracture Law of Surrounding Rock of Deep Chamber by Section Size. Geotech Geol Eng 37, 4911–4918 (2019). https://doi.org/10.1007/s10706-019-00951-9

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  • DOI: https://doi.org/10.1007/s10706-019-00951-9

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