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Stability Analysis of Paste Filling Roof by Cut and Fill Mining

Author

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  • Qingliang Chang

    (Key Laboratory of Deep Coal Resource Mining, Ministry of Education of China, School of Mines, China University of Mining and Technology, Xuzhou 221116, China)

  • Yifeng Sun

    (Key Laboratory of Deep Coal Resource Mining, Ministry of Education of China, School of Mines, China University of Mining and Technology, Xuzhou 221116, China)

  • Qiang Leng

    (Key Laboratory of Deep Coal Resource Mining, Ministry of Education of China, School of Mines, China University of Mining and Technology, Xuzhou 221116, China)

  • Zexu Liu

    (People’s Government of Dongshan Town, Qilin District, Qujing City 655004, China)

  • Huaqiang Zhou

    (Key Laboratory of Deep Coal Resource Mining, Ministry of Education of China, School of Mines, China University of Mining and Technology, Xuzhou 221116, China)

  • Yuantian Sun

    (Key Laboratory of Deep Coal Resource Mining, Ministry of Education of China, School of Mines, China University of Mining and Technology, Xuzhou 221116, China)

Abstract

Ensuring the stability of paste false rooves is an important issue in the study of the process of paste filling and slicing mining. Here, a mechanical model of a paste false roof is created to analyze its stability in the process of lower slicing mining in order to determine the minimum slicing thickness of the false roof. We use FLAC3D to simulate and analyze the influence of changes in paste false roof thickness on the stability of the roof. The quantitative functional relationship between the thickness and the subsidence of a false roof, and the optimal thickness of the artificial paste roof, is finally obtained by the development law of the plastic zone in the lower slicing face. The results show that when the thickness of the paste false roof is 3.2 m, the roof can maintain its self-stabilization state and ensure the normal mining of lower layers. Because the same thickness of the upper and lower layers is beneficial for mining replacement and equipment selection in different layered working faces, the optimal thickness of a paste false roof is determined to be 3.2 m.

Suggested Citation

  • Qingliang Chang & Yifeng Sun & Qiang Leng & Zexu Liu & Huaqiang Zhou & Yuantian Sun, 2021. "Stability Analysis of Paste Filling Roof by Cut and Fill Mining," Sustainability, MDPI, vol. 13(19), pages 1-14, September.
    • Handle: RePEc:gam:jsusta:v:13:y:2021:i:19:p:10899-:d:647482
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    References listed on IDEAS

    as
    1. Yuantian Sun & Guichen Li & Junfei Zhang & Jiahui Xu, 2020. "Failure Mechanisms of Rheological Coal Roadway," Sustainability, MDPI, vol. 12(7), pages 1-17, April.
    2. Yuantian Sun & Guichen Li & Junfei Zhang & Deyu Qian, 2019. "Stability Control for the Rheological Roadway by a Novel High-Efficiency Jet Grouting Technique in Deep Underground Coal Mines," Sustainability, MDPI, vol. 11(22), pages 1-17, November.
    3. Yuantian Sun & Guichen Li & Junfei Zhang & Junbo Sun & Jiandong Huang & Reza Taherdangkoo, 2021. "New Insights of Grouting in Coal Mass: From Small-Scale Experiments to Microstructures," Sustainability, MDPI, vol. 13(16), pages 1-17, August.
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    Cited by:

    1. Jiazeng Cao & Tao Wang & Chuanqi Zhu & Jianxin Yu & Xu Chen & Xin Zhang, 2023. "Identification Method of Optimal Copula Correlation Characteristic for Geological Parameters of Roof Structure," Sustainability, MDPI, vol. 15(20), pages 1-18, October.
    2. Qingliang Chang & Shiguo Ge & Xianyuan Shi & Yesong Sun & Haibin Wang & Mengda Li & Yizhe Wang & Fengfeng Wu, 2022. "Determination of Narrow Coal Pillar Width and Roadway Surrounding Rock Support Technology in Gob Driving Roadway," Sustainability, MDPI, vol. 14(8), pages 1-14, April.
    3. Bin Han & Kun Ji & Jiandong Wang & Shibo Wang & Peng Zhang & Yafei Hu, 2022. "Determination of the Required Strength of Artificial Roof for the Underhand Cut-and-Fill Mine Using Field Measurements and Theoretical Analysis," Sustainability, MDPI, vol. 15(1), pages 1-16, December.

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