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Numerical Study on the Effectiveness of Grouting Reinforcement on the Large Heaving Floor of the Deep Retained Goaf-Side Gateroad: A Case Study in China

Author

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  • Zhiyi Zhang

    (College of Geological and Mining Engineering, Xinjiang University, Ürümqi 830047, China)

  • Hideki Shimada

    (Department of Earth Resources Engineering, Kyushu University, Fukuoka 819-0395, Japan)

Abstract

To study the effectiveness of grouting reinforcement on a large heaving floor of the retained goaf-side gateroad (RGSG) at a 900 m depth in the Zhuji coal mine, a numerical model involving strain softening constitutive material was built. First, the simulated deformations of the RGSG were compared with field data to verify the reliability of the numerical model. Then, the dynamic distribution of the stress in the RGSG floor was examined to reveal the mechanism of floor heave. Finally, grouting reinforcement was proposed to control the RGSG floor, and the corresponding effectiveness was verified by improving the rock mechanics of the floor strata based on the results of numerical uniaxial compressive tests. The results demonstrated that a fairly good match was achieved between the field and numerical data, and the proposed FLAC3D (Fast Lagrangian Analysis of Continua) numerical model was an effective approach to study the stability of the deep RGSG. A variation of the ratio between horizontal stress to vertical stress in the floor strata was the root cause of floor heave in the deep RGSG. Ideally, the floor heave could be reduced by 41%, 62%, and 79% when the floor strata of 1 m depth were reinforced with grouting schemes I, II, and III, respectively.

Suggested Citation

  • Zhiyi Zhang & Hideki Shimada, 2018. "Numerical Study on the Effectiveness of Grouting Reinforcement on the Large Heaving Floor of the Deep Retained Goaf-Side Gateroad: A Case Study in China," Energies, MDPI, vol. 11(4), pages 1-15, April.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:4:p:1001-:d:142261
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    References listed on IDEAS

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    1. Zhiyi Zhang & Hideki Shimada & Takashi Sasaoka & Akihiro Hamanaka, 2017. "Stability Control of Retained Goaf-Side Gateroad under Different Roof Conditions in Deep Underground Y Type Longwall Mining," Sustainability, MDPI, vol. 9(10), pages 1-19, September.
    2. Hong-sheng Wang & Dong-sheng Zhang & Lang Liu & Wei-bin Guo & Gang-wei Fan & KI-IL Song & Xu-feng Wang, 2016. "Stabilization of Gob-Side Entry with an Artificial Side for Sustaining Mining Work," Sustainability, MDPI, vol. 8(7), pages 1-17, July.
    3. Peng Gong & Zhanguo Ma & Xiaoyan Ni & Ray Ruichong Zhang, 2017. "Floor Heave Mechanism of Gob-Side Entry Retaining with Fully-Mechanized Backfilling Mining," Energies, MDPI, vol. 10(12), pages 1-19, December.
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    Cited by:

    1. Wensheng Wei & Guojun Zhang & Chunyuan Li & Wenshuai Zhang & Yupeng Shen, 2023. "Mechanism and Control of Asymmetric Floor Heave in Deep Roadway Disturbed by Roof Fracture," Sustainability, MDPI, vol. 15(8), pages 1-21, April.
    2. Xingping Lai & Huicong Xu & Pengfei Shan & Yanlei Kang & Zeyang Wang & Xuan Wu, 2020. "Research on Mechanism and Control of Floor Heave of Mining-Influenced Roadway in Top Coal Caving Working Face," Energies, MDPI, vol. 13(2), pages 1-14, January.

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