Numerical Simulation Study on Surrounding Rock Stability in Large Section Coal Roadway by Different Lateral Pressure Coefficient

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Authors

  • Haizhu Li
     School of Mines, Key Laboratory of Deep Coal Resource Mining, Ministry of Education of China, China University of Mining & Technology ,CN
  • Yidong Zhang
     State Key Laboratory of Coal Resources and Mine Safety, China University of Mining & Technology, Xuzhou, 221116 ,CN
  • Hongjun Guo
     School of Mines, Key Laboratory of Deep Coal Resource Mining, Ministry of Education of China, China University of Mining & Technology ,CN
  • Meng Zhang
     School of Mines, Key Laboratory of Deep Coal Resource Mining, Ministry of Education of China, China University of Mining & Technology ,CN
  • Zhaohong Chen
     School of Mines, Key Laboratory of Deep Coal Resource Mining, Ministry of Education of China, China University of Mining & Technology ,CN
  • Ming Ji
     School of Mines, Key Laboratory of Deep Coal Resource Mining, Ministry of Education of China, China University of Mining & Technology ,CN

Keywords:

Numerical simulation, lateral pressure coefficient; stress field; plastic zone

Abstract

Based on the special conditions of Changzhi 3# coal seam in Shanxi province, the stress field and plastic zone of surrounding rock in thick coal seam roadway with large cross section under different side pressure coefficient (λ) are studied by using finite element software FLAC3D. The weak position of roadway is analyzed, and the stress direction of roadway support under different side pressure coefficient (λ<1) is put forward. (2). When λ = 1, both sides of the roadway and the roof are equally important and should not be neglected; (3) When λ>1, the stress concentration zone gradually shifts to the vicinity of the floor, and the maintenance of the floor should also be considered. According to the measured lateral pressure coefficients and numerical simulation results of the auxiliary roadway in the Changzhi coal mine, the main support direction of the roadway is provided. According to the convergence of the field section, the deformation law of the surrounding rock is basically consistent with the simulation results, which provides a new idea for the design of the roadway support.

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Published

2022-10-20

How to Cite

Li, H., Zhang, Y., Guo, H., Zhang, M., Chen, Z., & Ji, M. (2022). Numerical Simulation Study on Surrounding Rock Stability in Large Section Coal Roadway by Different Lateral Pressure Coefficient. Journal of Mines, Metals and Fuels, 67(2), 69–75. Retrieved from http://informaticsjournals.com/index.php/jmmf/article/view/31484

Issue

Volume 67, Issue 2, February 2019

Section

Articles

License

Creative Commons License

This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

 

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