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Geotechnical and Geological Engineering

, Volume 37, Issue 1, pp 95–105 | Cite as

Numerical Survey on the Destabilization Mechanism of Weakly Cemented Soft Rock Roadway Considering Interlayer Effect

  • Qing Ma
  • Zeng-hui ZhaoEmail author
  • Xiao-jie Gao
  • Shao-jie Chen
  • Yun-liang Tan
Original Paper
  • 110 Downloads

Abstract

One of the major challenges facing coal mines in western China is occurrence of large deformation and hanging roof falls when roadway contains weak interlayer. To determine the effect of the thickness, stiffness and strength of the weak mudstone interlayer on the deformation of the weakly cemented soft rock roadway, two numerical models were built aiming to clarify the mechanism of roof fall and large deformation in Hongqingliang coal mine, China. The results show that the thickness and stiffness of the weak mudstone interlayer have a great influence on the subsidence of the roof. With the increase of the thickness of the weak mudstone interlayer or the decrease of stiffness, the subsidence of the roof increases obviously, but the strength of the weak mudstone interlayer has little effect on the deformation of the roof. The results can be used as a reference for the study of deformation and destabilization of surrounding rock in weakly cemented soft rock roadway with weak mudstone interlayer.

Keywords

Weakly cemented soft rock Mudstone interlayer Roadway Deformation 

Notes

Acknowledgements

This work is supported by the National Natural Science Foundation of China (Grant Nos. 51774196, 51774194, 51474137 and 51578327), China Postdoctoral Science Foundation (No. 2016M592221), SDUST Young Teachers Teaching Talent Training Plan (BJRC20160501), and SDUST Graduate Student Technology Innovation Project (No. SDKDYC180203). The above financial support is gratefully acknowledged.

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Copyright information

© Springer International Publishing AG, part of Springer Nature 2018

Authors and Affiliations

  • Qing Ma
    • 1
  • Zeng-hui Zhao
    • 1
    Email author
  • Xiao-jie Gao
    • 1
  • Shao-jie Chen
    • 1
  • Yun-liang Tan
    • 1
  1. 1.State Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and TechnologyShandong University of Science and TechnologyQingdaoChina

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