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Theoretical determination method and field verification of the fracture position of the main roof of the gob-side coal-rock roadway in gently inclined coal seam

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Abstract

In order to provide a theoretical determination method for the fracture position of the main roof of the gob-side coal-rock roadway in a gently inclined coal seam (GCRGICS), a mechanical model of the overlying strata structure and a mechanical model of the coal rock body in the limit equilibrium zone were established based on the elastic–plastic limit equilibrium theory. The theoretical calculation formula of the fracture position of the main roof of the GCRGICS was derived. The fracture position of the main roof theory calculation and field test verification were carried out on 1511, 1509, and 151608 return airflow roadways with similar geological conditions in the Panjiang mining area of Guizhou Province. Combined with the similar simulation experimental results of the 1511 return airflow roadway, the differences between the similar simulation, field test and theoretical calculation results were all less than 1, which verified the practicality and reliability of the method. This method can be used to guide the reasonable width of coal pillar retention and the control of the surrounding rock in this type of roadway.

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Funding

This paper is financially supported by the National Natural Science Foundation of China (No. 52004073 and No.52264008); Guizhou Provincial Science and Technology Support Project (No. Qian Ke He Zhi Cheng [2021] General 400); Guizhou Provincial Science and Technology Foundation (No. Qian Ke He Ji Chu [2020]1Y216); Guizhou Science and Technology Plan Project (Qianke Science Foundation [2020] 1Z047); The Scientific research project for talents introduction of Guizhou University (No. Gui Da Ren Ji He Zi (2020) No. 42), and The Cultivation project of Guizhou University (No. Gui Da Pei Yu [2019] No. 27); The Open Project Fund of Key Laboratory of Mining Disaster Prevention and Control (No. SMDPC202106) during the research.

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Authors and Affiliations

  1. College of Mining, Guizhou University, Guiyang, 550025, China

    Xinyu Zhan, Lin Gao, Pengze Liu, Pandong Zhang, Ping Liu & Yongyin Wang

  2. Coal Mine Roadway Support and Disaster Prevention Engineering Research Center, Beijing, 100083, China

    Lin Gao

  3. National & Local Joint Laboratory of Engineering for Effective Utilization of Regional Mineral Resources From Karst Areas, Guiyang, 550025, China

    Lin Gao, Ping Liu & Yongyin Wang

  4. Key Laboratory of Mining Disaster Prevention and Control, Qingdao, 266590, China

    Lin Gao

  5. School of Energy and Mining Engineering, China University of Mining and Technology (Beijing), Beijing, 100083, China

    Zhiqiang Zhao

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  1. Xinyu Zhan
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  2. Lin Gao
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  3. Pengze Liu
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  4. Zhiqiang Zhao
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  5. Pandong Zhang
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  6. Ping Liu
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  7. Yongyin Wang
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Correspondence to Lin Gao.

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Zhan, X., Gao, L., Liu, P. et al. Theoretical determination method and field verification of the fracture position of the main roof of the gob-side coal-rock roadway in gently inclined coal seam. Bull Eng Geol Environ 82, 209 (2023). https://doi.org/10.1007/s10064-023-03249-6

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