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Research on Mechanism and Control of Floor Heave of Mining-Influenced Roadway in Top Coal Caving Working Face

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  • Xingping Lai

    (School of Energy Engineering, Xi’an University of Science and Technology, Xi’an 710054, China
    Key Laboratory of Western Mines and Hazard Prevention of China Ministry of Education, Xi’an 710054, China)

  • Huicong Xu

    (School of Energy Engineering, Xi’an University of Science and Technology, Xi’an 710054, China)

  • Pengfei Shan

    (School of Energy Engineering, Xi’an University of Science and Technology, Xi’an 710054, China
    Key Laboratory of Western Mines and Hazard Prevention of China Ministry of Education, Xi’an 710054, China)

  • Yanlei Kang

    (State Grid Energy Hami Coal and Electricity Co., Ltd., Hami 839000, China)

  • Zeyang Wang

    (School of Energy Engineering, Xi’an University of Science and Technology, Xi’an 710054, China)

  • Xuan Wu

    (School of Energy Engineering, Xi’an University of Science and Technology, Xi’an 710054, China)

Abstract

The stability of the surrounding rock is the key problem regarding the normal use of coal mine roadways, and the floor heave of roadways is one of the key factors that can restrict high-yield and high-efficiency mining. Based on the 1305 auxiliary transportation roadway geological conditions in the Dananhu No. 1 Coal Mine, Xinjiang, the mechanism of roadway floor heave was studied by field geological investigation, theoretical analysis, and numerical simulation. We think that the surrounding rock of the roadway presents asymmetrical shrinkage under the original support condition, and it is the extrusion flow type floor heave. The bottom without support and influence of mining are the important causes of floor heave. Therefore, the optimal support scheme is proposed and verified. The results show that the maximum damage depth of the roadway floor is 3.2 m, and the damage depth of the floor of roadway ribs is 3.05 m. The floor heave was decreased from 735 mm to 268 mm, and the force of the rib bolts was reduced from 309 kN to 90 kN after using the optimization supporting scheme. This scheme effectively alleviated the “squeeze” effect of the two ribs on the soft rock floor, and the surrounding rock system achieves long-term stability after optimized support. This provides scientific guidance for field safe mining.

Suggested Citation

  • 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.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:2:p:381-:d:308113
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    References listed on IDEAS

    as
    1. 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.
    2. 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. Hanghang Zheng & Zhenqian Ma & Lang Zhou & Dongyue Zhang & Xuchao Liang, 2022. "Effect of Loading Rate and Confining Pressure on Strength and Energy Characteristics of Mudstone under Pre-Cracking Damage," Energies, MDPI, vol. 15(10), pages 1-15, May.
    3. Yongli Liu & Jingtao Li & Yanwei Duan & Tao Qin & Zhenwen Liu, 2023. "Study on the Influence of Roadway Structural Morphology on the Mechanical Properties of Weakly Cemented Soft Rock Roadways," Sustainability, MDPI, vol. 15(1), pages 1-16, January.
    4. Zexin Li & Yidong Zhang & Qi Ma & Yu Zheng & Guangyuan Song & Wanzi Yan & Yu Zhang & Lei Hu, 2023. "The Floor Heave Mechanism and Control Technology of Gob-Side Entry Retaining of Soft Rock Floor," Sustainability, MDPI, vol. 15(7), pages 1-22, March.
    5. Piotr Małkowski & Łukasz Ostrowski & Jerzy Stasica, 2022. "Modeling of Floor Heave in Underground Roadways in Dry and Waterlogged Conditions," Energies, MDPI, vol. 15(12), pages 1-27, June.
    6. Yu Liu & Jingzhong Zhu & Qimeng Liu & Anying Yuan & Shifang He & Yisheng Bai, 2022. "Mechanism Analysis of Delayed Water Inrush from Karst Collapse Column during Roadway Excavation Based on Seepage Transition Theory: A Case Study in PanEr Coal Mine," Energies, MDPI, vol. 15(14), pages 1-13, July.
    7. Deqiu Wang & Yun Zheng & Fulian He & Jiayu Song & Jianlong Zhang & Yanhao Wu & Pengpeng Jia & Xiaohui Wang & Baoping Liu & Feifei Wang & Yajiang Zhang & Kai Tao, 2023. "Mechanism and Control of Asymmetric Floor Heave in the Gob-Side Coal Roadway under Mining Pressure in Extra-Thick Coal Seams," Energies, MDPI, vol. 16(13), pages 1-19, June.
    8. Piotr Małkowski & Łukasz Ostrowski & Łukasz Bednarek, 2020. "The Effect of Selected Factors on Floor Upheaval in Roadways—In Situ Testing," Energies, MDPI, vol. 13(21), pages 1-23, October.

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