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Research on J 2 Evolution Law and Control under the Condition of Internal Pressure Relief in Surrounding Rock of Deep Roadway

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  • Dongdong Chen

    (School of Energy and Mining Engineering, China University of Mining & Technology-Beijing, Beijing 100083, China)

  • Zhiqiang Wang

    (School of Energy and Mining Engineering, China University of Mining & Technology-Beijing, Beijing 100083, China)

  • Zaisheng Jiang

    (School of Energy and Mining Engineering, China University of Mining & Technology-Beijing, Beijing 100083, China)

  • Shengrong Xie

    (School of Energy and Mining Engineering, China University of Mining & Technology-Beijing, Beijing 100083, China)

  • Zijian Li

    (School of Energy and Mining Engineering, China University of Mining & Technology-Beijing, Beijing 100083, China)

  • Qiucheng Ye

    (School of Energy and Mining Engineering, China University of Mining & Technology-Beijing, Beijing 100083, China)

  • Jingkun Zhu

    (School of Energy and Mining Engineering, China University of Mining & Technology-Beijing, Beijing 100083, China)

Abstract

In order to solve the support problem of deep soft crushed coal roadway, a concentrated cavern in a mining station of a mine is taken as the test object. Based on the analysis and summary of the field observation data and the law of rock pressure appearance, a new technology of pressure relief anchoring with the main body of “initiative support + borehole pressure relief” is proposed. This new technology will carry out strong active support in the shallow part of the surrounding rock and excavate a row of low-density large-diameter pressure relief boreholes in the deep coal body of the roadway ribs. The numerical analysis model is established by FLAC 3D , and the second invariant of deviatoric stress ( J 2 ) is used as the analysis index to elaborate the influence of different borehole parameters on the pressure relief effect of roadway surrounding rock. The results show that different borehole parameters have different effects on roadway pressure relief, that is, borehole depth > borehole length > borehole spacing. After the borehole process is used to relieve the pressure of the surrounding rock, the deformation of the mining roadway side in the subsequent observation process is always controlled within the range of 100 mm, and the shallow surrounding rock support system is effectively protected. The comprehensive control effect is very obvious. Therefore, the field practice proves that the supporting technology can effectively solve the problem of large deformation support of similar roadway surrounding rock.

Suggested Citation

  • Dongdong Chen & Zhiqiang Wang & Zaisheng Jiang & Shengrong Xie & Zijian Li & Qiucheng Ye & Jingkun Zhu, 2023. "Research on J 2 Evolution Law and Control under the Condition of Internal Pressure Relief in Surrounding Rock of Deep Roadway," Sustainability, MDPI, vol. 15(13), pages 1-22, June.
    • Handle: RePEc:gam:jsusta:v:15:y:2023:i:13:p:10226-:d:1181247
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    References listed on IDEAS

    as
    1. Dongdong Chen & Fangfang Guo & Zijian Li & Xiang Ma & Shengrong Xie & Yiyi Wu & Zhiqiang Wang, 2022. "Study on the Influence and Control of Stress Direction Deflection and Partial-Stress Boosting of Main Roadways Surrounding Rock and under the Influence of Multi-Seam Mining," Energies, MDPI, vol. 15(21), pages 1-24, November.
    2. Xiangyu Wang & Lei Zhang, 2022. "Experimental Study on Permeability Evolution of Deep Coal Considering Temperature," Sustainability, MDPI, vol. 14(22), pages 1-17, November.
    3. Dongdong Qin & Xufeng Wang & Dongsheng Zhang & Xuyang Chen, 2019. "Study on Surrounding Rock-Bearing Structure and Associated Control Mechanism of Deep Soft Rock Roadway Under Dynamic Pressure," Sustainability, MDPI, vol. 11(7), pages 1-15, March.
    4. Houqiang Yang & Nong Zhang & Changliang Han & Changlun Sun & Guanghui Song & Yuantian Sun & Kai Sun, 2021. "Stability Control of Deep Coal Roadway under the Pressure Relief Effect of Adjacent Roadway with Large Deformation: A Case Study," Sustainability, MDPI, vol. 13(8), pages 1-14, April.
    5. Phoebe M. R. DeVries & Fernanda Viégas & Martin Wattenberg & Brendan J. Meade, 2018. "Deep learning of aftershock patterns following large earthquakes," Nature, Nature, vol. 560(7720), pages 632-634, August.
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