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Study on Surrounding Rock-Bearing Structure and Associated Control Mechanism of Deep Soft Rock Roadway Under Dynamic Pressure

Author

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  • Dongdong Qin

    (School of Mines, China University of Mining & Technology, Xuzhou, Jiangsu 221116, China
    State Key Laboratory of Coal Resources and Safe Mining, China University of Mining & Technology, Xuzhou, Jiangsu 221116, China)

  • Xufeng Wang

    (School of Mines, China University of Mining & Technology, Xuzhou, Jiangsu 221116, China
    State Key Laboratory of Coal Resources and Safe Mining, China University of Mining & Technology, Xuzhou, Jiangsu 221116, China
    The Jiangsu Laboratory of Mining-Induced Seismicity Monitoring, China University of Mining & Technology, Xuzhou, Jiangsu 221116, China)

  • Dongsheng Zhang

    (School of Mines, China University of Mining & Technology, Xuzhou, Jiangsu 221116, China
    State Key Laboratory of Coal Resources and Safe Mining, China University of Mining & Technology, Xuzhou, Jiangsu 221116, China)

  • Xuyang Chen

    (School of Mines, China University of Mining & Technology, Xuzhou, Jiangsu 221116, China
    State Key Laboratory of Coal Resources and Safe Mining, China University of Mining & Technology, Xuzhou, Jiangsu 221116, China)

Abstract

Providing support for deep soft rock roadways under dynamic pressure is a major technical challenge. In this study, the distribution characteristics of surrounding rock-bearing structure of such roadways were systematically examined using theoretical analysis and numerical simulation. Based on the control effect of different support methods on the surrounding rock-bearing structure; a reinforcement scheme for deep dynamic soft rock roadway was proposed and applied. The results indicate that: (1) by increasing the supporting strength of the internal bearing structure, cohesion, and internal friction angle of the surrounding rock, and by reducing the influence of mining, making the external bearing structure close to the roadway and reducing the thickness of the bearing structure, can improve the bearing capacity of the shallow surrounding rock in the roadway; (2) under the conditions of dynamic load and creep of the surrounding rock; the deformation of the rock increases significantly; external bearing structure is far away from the roadway, and thickness of the bearing structure increases; anchor cable support and floor pressure relief effect better control over the roof and the roadside deformation and floor heave, respectively; and the thickness of the corresponding external bearing structure is reduced by 30.84% and 41.50%, respectively; and (3) based on the application, the zonal reinforcement scheme of “fix cable to shed, floor pressure relief, deep-shallow composite grouting” is proposed and put into practice, with good results. The results of this study can provide theoretical support and reference for the determination of supporting parameters in deep roadways.

Suggested Citation

  • 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.
    • Handle: RePEc:gam:jsusta:v:11:y:2019:i:7:p:1892-:d:218180
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    Citations

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    Cited by:

    1. 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.
    2. Qingxian Huang & Xufeng Wang & Xuyang Chen & Dongdong Qin & Zechao Chang, 2020. "Evolution of Interior and Exterior Bearing Structures of the Deep-Soft-Rock Roadway: From Theory to Field Test in the Pingdingshan Mining Area," Energies, MDPI, vol. 13(17), pages 1-19, August.
    3. Peng Wang & Nong Zhang & Jiaguang Kan & Bin Wang & Xingliang Xu, 2021. "Stabilization of Rock Roadway under Obliquely Straddle Working Face," Energies, MDPI, vol. 14(18), pages 1-23, September.
    4. Yuxi Hao & Mingliang Li & Wen Wang & Zhizeng Zhang & Zhun Li, 2023. "Study on the Stress Distribution and Stability Control of Surrounding Rock of Reserved Roadway with Hard Roof," Sustainability, MDPI, vol. 15(19), pages 1-21, September.
    5. Renliang Shan & Weijun Liu & Gengzhao Li & Chen Liang & Shuguo Shi & Ye Chen & Shupeng Zhang, 2022. "Experimental Study on the Shear Mechanical Properties of Anchor Cable with C-Shaped Tube," Sustainability, MDPI, vol. 14(15), pages 1-16, August.
    6. Hai Wu & Qian Jia & Weijun Wang & Nong Zhang & Yiming Zhao, 2021. "Experimental Test on Nonuniform Deformation in the Tilted Strata of a Deep Coal Mine," Sustainability, MDPI, vol. 13(23), pages 1-14, November.
    7. Houqiang Yang & Changliang Han & Nong Zhang & Yuantian Sun & Dongjiang Pan & Changlun Sun, 2020. "Long High-Performance Sustainable Bolt Technology for the Deep Coal Roadway Roof: A Case Study," Sustainability, MDPI, vol. 12(4), pages 1-14, February.
    8. Houqiang Yang & Changliang Han & Nong Zhang & Changlun Sun & Dongjiang Pan & Minghui Dong, 2019. "Stability Control of a Goaf-Side Roadway under the Mining Disturbance of an Adjacent Coal Working Face in an Underground Mine," Sustainability, MDPI, vol. 11(22), pages 1-18, November.

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