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Roadside support schemes numerical simulation and field monitoring of gob-side entry retaining in soft floor and hard roof

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Abstract

One of the reasons for the failure of gob-side entry retaining under the hard roof and the soft floor is the lack of supporting strength at the end of the roadway and the breakdown of the coal wall when the roof is pressed. To this end, the supporting concept of “enhancing the support strength and realizing the cutting roof along the gob-side” was put forward and three roadside support schemes were designed. Taking the gob-side entry retaining in Binhu coal mine as an example, the three roadside support schemes were analyzed by numerical simulation and field monitoring. The analysis results show that the roadside support scheme of “anchorage cable + single hydraulic prop cut roof and anchor net retaining wall support” can effectively control the roof sinking of the roadway and realize the roof cutting. The research can provide a reference for roadside support of gob-side entry retaining in limestone roof and soft floor.

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Funding

This work is supported by the National Natural Science Foundation of China (Grant No. 51774196, No. 51474137), China Postdoctoral Science Foundation (No. 2016M592221), SDUST Graduate Student Technology Innovation Project (No. SDKDYC180203).

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Authors and Affiliations

  1. State Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao, 266590, China

    Qing Ma, Yunliang Tan, Zenghui Zhao, Qiang Xu, Jun Wang & Ke Ding

  2. College of Mining and Safety Engineering, Shan Dong University of Science and Technology, Qingdao, 266590, China

    Qing Ma, Yunliang Tan, Zenghui Zhao, Qiang Xu, Jun Wang & Ke Ding

Authors
  1. Qing Ma
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  2. Yunliang Tan
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  3. Zenghui Zhao
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  4. Qiang Xu
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  5. Jun Wang
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  6. Ke Ding
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Corresponding author

Correspondence to Qing Ma.

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Ma, Q., Tan, Y., Zhao, Z. et al. Roadside support schemes numerical simulation and field monitoring of gob-side entry retaining in soft floor and hard roof. Arab J Geosci 11, 563 (2018). https://doi.org/10.1007/s12517-018-3904-9

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  • DOI: https://doi.org/10.1007/s12517-018-3904-9

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