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Study on the Stability and Deformation of the Roadway Subjected to High In-Situ Stresses

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Abstract

To investigate the deformation and failure mechanism of the roadway under high in situ stresses at the 958 section in 2# mine in Jin Chuan, China, field and numerical investigations were conducted. Field investigations on the loosen ring of the roadway show that great roadway deformations and failure in surrounding rocks may result from poorly functioned bolts. Based on the old supporting system, a new supporting system characterized by the installation of steel pipe beams and the elongated bolts was proposed and applied in field. Field data indicate that the roof sag, rib convergence and floor heave significantly decrease. The numerical study illustrates that the properly functioned bolts and steel pipe beams are responsible for the decrease of roadway deformation. To further control the roadway deformation, two additional supporting systems were proposed and simulated. The increase of the bolt density contributes to reinforcement of the surrounding rocks and the floor heave in the first support system is under controlled. In the second support system, the installation of bolt on floor successfully restrains floor heaves accordingly.

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Acknowledgements

The authors would like to acknowledge these financial supports: the State Key Research Development Program of China (2016YFC0600706); the National Basic Research Program of China (2013CB035401); Projects (51604299, 51274249, 51474252) supported by the National Natural Science Foundation of China; Project funded by China Postdoctoral Science Foundation (2016M600636) and Project (14C0746) supported by Water Resources Department of Hunan Province.

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Authors and Affiliations

  1. School of Resources and Safety Engineering, Central South University, Changsha, China

    Chunhuang Du, Ping Cao & Yu Chen

  2. Department of Building Engineering, Hunan Institute of Engineering, Xiangtan, China

    Jie Liu

  3. School of Energy and Safety Engineering, Hunan University of Science and Technology, Xiangtan, China

    Yanlin Zhao

  4. Department of Hydraulic Engineering, Hunan Polytechnic of Water Resources and Electric Power, Changsha, China

    Jingshuo Liu

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  1. Chunhuang Du
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  2. Ping Cao
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  3. Yu Chen
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  4. Jie Liu
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  5. Yanlin Zhao
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Correspondence to Chunhuang Du or Yu Chen.

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Du, C., Cao, P., Chen, Y. et al. Study on the Stability and Deformation of the Roadway Subjected to High In-Situ Stresses. Geotech Geol Eng 35, 1615–1628 (2017). https://doi.org/10.1007/s10706-017-0197-9

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  • DOI: https://doi.org/10.1007/s10706-017-0197-9

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