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Analysis of Cooperative Control Effect of Pressure Relief and Long Bolt Support for Deep Roadway Under Strong Mining Disturbance of Adjacent Working Face

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Abstract

The stability of mining roadways is pivotal to safe mining in deep underground coal mines. In order to control the stability of mining roadways in deep mines, this paper studies the cooperative control effect of pressure relief and long bolt support for deep roadway under strong mining disturbance of adjacent working face in Wenjiapo Coal Mine in West China. The numerical calculation software FLAC3D was used to simulate the distribution law of the displacement, stress and plastic zone around the roadway under the disturbance of excavation and working face mining with three support schemes: “short bolt + long cable”, “long bolt + short cable”, and “long bolt + short cable + drillholes and cutting grooves pressure relief”. The results show that extending the length of bolt can ensure the supporting effect while reducing the consumption of anchor cables in the roof, and can reduce the roadway floor heave by 5.5%. Moreover, the peak lateral pressure of the roadway is reduced by 12.5%, the peak value is shifted to the depth by 6 m, and the floor heave of the roadway is reduced by 36% when the countermeasures of pressure relief in the ribs and floor are adopted. This indicates that the schemes of pressure relief and long bolt support has a significant beneficial effect on decreasing the high stress environment and controlling the deformation of roadway.

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Acknowledgements

This work was financially supported by the Natural Science Fundamental Research Program Enterprise United Fund of Shaanxi Province of China (Grant No. 2019JLZ-04).

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Authors and Affiliations

  1. Shaanxi Coal and Chemical Technology Institute Company Limited, Xi’an, 710100, China

    Sujian Wang & Shengyao Jin

  2. Key Laboratory of Deep Coal Resource Mining, Ministry of Education of China, School of Mines, China University of Mining and Technology, Xuzhou, 221116, China

    Zhe Xiang, Jinping Deng, Houqiang Yang & Xingguo Yang

  3. The National Joint Engineering Research Center of the Green, Safe and Efficient Coal Mining, Xi’an, 710065, China

    Sujian Wang & Shengyao Jin

  4. Sanqin Scholar Innovation Team, Shaanxi Coal Industry Chemical Group Co., Ltd., Xi’an, 710100, China

    Sujian Wang & Shengyao Jin

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  1. Sujian Wang
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  2. Zhe Xiang
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  3. Jinping Deng
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  4. Houqiang Yang
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  5. Xingguo Yang
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  6. Shengyao Jin
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Correspondence to Zhe Xiang.

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Wang, S., Xiang, Z., Deng, J. et al. Analysis of Cooperative Control Effect of Pressure Relief and Long Bolt Support for Deep Roadway Under Strong Mining Disturbance of Adjacent Working Face. Geotech Geol Eng 39, 2259–2268 (2021). https://doi.org/10.1007/s10706-020-01622-w

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  • DOI: https://doi.org/10.1007/s10706-020-01622-w

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