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Geotechnical and Geological Engineering

, Volume 36, Issue 4, pp 2553–2564 | Cite as

Stability Evaluation of Old Goaf Treated with Grouting Under Building Load

  • Changxiang Wang
  • Yao Lu
  • Boqiang Cui
  • Guo Hao
  • Xin Zhang
Original paper
  • 69 Downloads

Abstract

In this paper, stability of overlying strata and grouting entities are determined as the two key factors affecting the stability of old goaf treated with grouting under building load by theoretical analysis, the additional stress influence depth and the grouting entities strength are determined as the two key indexes for the stability of old goaf treated with grouting under building load. Through theoretical analysis and field investigation, the calculation method of the influence depth of the additional stress in the old goaf under the building load is revised, and the calculation formula of the grouting entities strength is confirmed by theoretical analysis and the experimental results. The uniaxial compression and uniaxial creep stability of the grouting entities under dry and saturated conditions are verified by mechanical experiments. And the revised parameter reference value is provided for the calculation formula of the grouting entities strength. Finally, the stability of the grouting reinforcement project in China is verified by numerical simulation.

Keywords

Building load Grouting reinforcement Old goaf Mechanics experiment Numerical simulation 

Notes

Acknowledgements

This research was supported by grants from the Foundation from the Henan Key Laboratory for Green and Efficient Mining & Comprehensive Utilization of Mineral Resources (Henan Polytechnic University) (Grant No. S201606) and Shandong Province Natural Science Foundation Project (ZR2017MEE055).

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Copyright information

© Springer International Publishing AG, part of Springer Nature 2018

Authors and Affiliations

  1. 1.College of Mining and Safety EngineeringShandong University of Science and TechnologyQingdaoChina

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