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Characteristics and Control Measures of Deep and Shallow Dense Drilling in Roadway for Pressure Relieving by Cutting Roof

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Abstract

To solve the problem of large deformation of deep soft rock roadway, taking the soft rock roadway of no. 1 coal mine in New Shanghai as an engineering example, the deformation mechanism of surrounding rock of deep soft rock roadway is analyzed by combining theoretical analysis, numerical simulation and field test, and the control countermeasures centering on deep and shallow dense drilling are put forward. Through theoretical derivation, based on the masonry beam theory, surrounding rock structure S-R stability principle and composite beam principle, the length, angle, and spacing of deep and shallow dense drilling are determined. Through numerical simulation, the deformation evolution process of soft rock roadway surrounding rock after dense drilling pressure relief is reproduced, and the influence of drilling parameters (drilling spacing, dip angle) on pressure relief effect is analyzed and compared. The field application test and monitoring verify that the deformation control measures of deep and shallow dense drilling broken roof surrounding rock have a good effect of large deformation control of soft rock roadway, and provide a new support means for the safety and stability control of soft rock roadway.

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Authors and Affiliations

  1. State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology (Beijing), Beijing, 100083, China

    Xiaoming Sun, Zhenmin Qi, Yong Zhang, Zhihu Li, Cheng Xie, Jinkun Yang, Jiaxu Ding & Linsen He

  2. School of Mechanics and Civil Engineering, China University of Mining and Technology (Beijing), Beijing, 100083, China

    Xiaoming Sun, Zhenmin Qi, Yong Zhang, Zhihu Li, Cheng Xie, Jinkun Yang, Jiaxu Ding & Linsen He

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  1. Xiaoming Sun
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  2. Zhenmin Qi
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  3. Yong Zhang
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  4. Zhihu Li
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  5. Cheng Xie
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  6. Jinkun Yang
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Correspondence to Yong Zhang.

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Sun, X., Qi, Z., Zhang, Y. et al. Characteristics and Control Measures of Deep and Shallow Dense Drilling in Roadway for Pressure Relieving by Cutting Roof. Mining, Metallurgy & Exploration 41, 787–803 (2024). https://doi.org/10.1007/s42461-024-00940-4

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  • DOI: https://doi.org/10.1007/s42461-024-00940-4

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