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Study on the Coal–rock Ratio Effect of Asymmetric Deformation and Failure of the Gob–side Coal–rock Roadway in Gently Inclined Coal Seam

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Abstract

In order to reveal the deformation and failure characteristics and the stability of the rock surrounding the gob–side coal–rock roadway in gently inclined coal seam (GCRICS) under different coal–rock ratios, the deformation characteristics of the surrounding rocks under four different coal–rock ratios were studied by field investigation and numerical simulation. The results indicated that the degree of asymmetric deformation of GCRICS with different coal–rock ratios progressed from small to large: 1/5, 2/5, 3/5, and 4/5. With the gradual increase in the coal–rock ratio, the thickness of the coal seam increased, the mined-out area range increased in upper and lower sections, and the plastic zone in the roof strata of the roadway tended to gradually increase both vertically and along the incline downwards. This indicated the gradual increase in the influence of the upper and lower sections working face mining on the destruction of roof strata; the plastic zone range of the fine sandstone floor was less affected by the coal–rock ratio and underwent little change. Comprehensive analysis showed that the asymmetric deformation characteristics of the rock surrounding the roadway were greatly affected by the coal–rock ratio, and the larger the coal–rock ratio was, the more significant the asymmetric deformation characteristics were.

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Data Availability

The datasets generated during and analysed during the current study are not publicly available due to confidentiality of data, but 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 (nos. 52004073; 52064009); The Science and Technology Support Plan of Guizhou Province (no. Qian Ke He Zhi Cheng [2021] General 400); The Science and Technology Fundation of Guizhou Province (no. Qian Ke He Ji Chu [2020] 1Y216); The Guizhou Science and Technology Plan Project (no. Qianke Science Foundation [2020]1Z047); The Scientific Research Project for Talents Introduction of Guizhou University (no. Gui Da Ren Ji Hebblewhite and Lu (2020) no. 42); The Cultivation Project of Guizhou University (no. Guidapeiyu [2019] no. 27), and 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. School of Mining, Mining College of Guizhou University, Guizhou University, Guiyang, 550025, China

    Lin Gao, Yexing Shen, Ping Liu, Yongyin Wang, Zhenqian Ma, Xiangtao Kang & Sen Han

  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 MineralResources From Karst Areas, Guizhou University, Guiyang, 550025, China

    Lin Gao, Ping Liu, Yongyin Wang, Zhenqian Ma, Xiangtao Kang & Sen Han

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

    Lin Gao

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  1. Lin Gao
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  2. Yexing Shen
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  3. Ping Liu
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  7. Sen Han
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Contributions

Conceptualization: LG and YS; Methodology: LG and YS; Software: LG and ZM; Validation: PL, YS and; Formal analysis: XK and YW; Investigation: LG, YS, PL, YW, XK, ZM, and SH; Resources: LG; Data curation: YS; Writing-original draft preparation: YS; Writing-review and editing: LG; Visualization: YW and PL; Funding acquisition: LG, PL and XK; Supervision: LG. All authors have read and agreed to the publishedversion of the manuscrip.

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Correspondence to Lin Gao.

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Gao, L., Shen, Y., Liu, P. et al. Study on the Coal–rock Ratio Effect of Asymmetric Deformation and Failure of the Gob–side Coal–rock Roadway in Gently Inclined Coal Seam. Geotech Geol Eng 41, 243–255 (2023). https://doi.org/10.1007/s10706-022-02276-6

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  • DOI: https://doi.org/10.1007/s10706-022-02276-6

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