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Wide Strip Backfill Mining for Surface Subsidence Control and Its Application in Critical Mining Conditions of a Coal Mine

Author

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  • Wenhao Cao

    (School of Mines, China University of Mining & Technology, Xuzhou 221116, China)

  • Xufeng Wang

    (School of Mines, China University of Mining & Technology, Xuzhou 221116, China
    The Jiangsu Laboratory of Mining-Induced Seismicity Monitoring, China University of Mining & Technology, Xuzhou 221116, China
    Key Laboratory of Deep Coal Resource Mining, China University of Mining & Technology, Xuzhou 221116, China)

  • Peng Li

    (School of Mines, China University of Mining & Technology, Xuzhou 221116, China)

  • Dongsheng Zhang

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

  • Chundong Sun

    (Jizhong Energy Handan Mining Industry Group, Handan 056002, China)

  • Dongdong Qin

    (School of Mines, China University of Mining & Technology, Xuzhou 221116, China)

Abstract

Critical mining under buildings, railways, and water bodies (BRW) brings the contradiction between high recovery rate and minor environmental hazards. To lessen this contradiction, an innovative mining method referred to as “wide strip backfill mining” (WSBM) was proposed in this study. A Winkler beam model is applied to the primary key strata (PKS), and the study revealed a surface subsidence control mechanism and designed the technical parameters of the method. The respective numerical simulations suggested the feasibility of the proposed method and the main influencing factors on surface subsidence can be ranked in descending order as wide filling strip width (WFSW), filling ratio, and pillar width. Meanwhile, a drop in the WFSW from 96 m to 72 m brought out the surface subsidence reduction by 44.5%. By using the super-high water content filling material, the proposed method was applied in the Taoyi coal mine under critical mining conditions. The resulting surface subsidence and deformations met the safety requirements for building protection level 1, and the recovery rate reached 75.9%. Moreover, the application of the method achieved significant technical and economic benefits. The research can provide a theoretical and experimental substantiation for critical mining under BRW.

Suggested Citation

  • Wenhao Cao & Xufeng Wang & Peng Li & Dongsheng Zhang & Chundong Sun & Dongdong Qin, 2018. "Wide Strip Backfill Mining for Surface Subsidence Control and Its Application in Critical Mining Conditions of a Coal Mine," Sustainability, MDPI, vol. 10(3), pages 1-16, March.
    • Handle: RePEc:gam:jsusta:v:10:y:2018:i:3:p:700-:d:134744
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    References listed on IDEAS

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    1. Shaojie Chen & Dawei Yin & Fengwei Cao & Yong Liu & Kaiqiang Ren, 2016. "An overview of integrated surface subsidence-reducing technology in mining areas of China," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 81(2), pages 1129-1145, March.
    2. Dayang Xuan & Jialin Xu, 2014. "Grout injection into bed separation to control surface subsidence during longwall mining under villages: case study of Liudian coal mine, China," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 73(2), pages 883-906, September.
    3. Xufeng Wang & Dongdong Qin & Dongsheng Zhang & Chundong Sun & Chengguo Zhang & Mengtang Xu & Bo Li, 2017. "Mechanical Characteristics of Superhigh-Water Content Material Concretion and Its Application in Longwall Backfilling," Energies, MDPI, vol. 10(10), pages 1-15, October.
    4. Shaojie Chen & Dawei Yin & Fengwei Cao & Yong Liu & Kaiqiang Ren, 2016. "An overview of integrated surface subsidence-reducing technology in mining areas of China," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 81(2), pages 1129-1145, March.
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    Citations

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    Cited by:

    1. Liang Li & Qingxiang Huang & Xiao Zuo & Jie Wu & Baoning Wei & Yanpeng He & Weilong Zhang & Jie Zhang, 2022. "Study on the Slurry Diffusion Law of Fluidized Filling Gangue in the Caving Goaf of Thick Coal Seam Fully Mechanized Caving Mining," Energies, MDPI, vol. 15(21), pages 1-18, November.
    2. Krzysztof Skrzypkowski, 2020. "Comparative Analysis of the Mining Cribs Models Filled with Gangue," Energies, MDPI, vol. 13(20), pages 1-18, October.
    3. Jia Liu & Fengshan Ma & Jie Guo & Guang Li & Yewei Song & Yang Wan, 2022. "A Field Study on the Law of Spatiotemporal Development of Rock Movement of Under-Sea Mining, Shandong, China," Sustainability, MDPI, vol. 14(10), pages 1-13, May.
    4. Xiaoping Shao & Xin Li & Long Wang & Zhiyu Fang & Bingchao Zhao & Ershuai Liu & Yeqing Tao & Lang Liu, 2020. "Study on the Pressure-Bearing Law of Backfilling Material Based on Three-Stage Strip Backfilling Mining," Energies, MDPI, vol. 13(1), pages 1-16, January.
    5. Dacian Paul Marian & Ilie Onica & Ramona-Rafila Marian & Dacian-Andrei Floarea, 2020. "Finite Element Analysis of the State of Stresses on the Structures of Buildings Influenced by Underground Mining of Hard Coal Seams in the Jiu Valley Basin (Romania)," Sustainability, MDPI, vol. 12(4), pages 1-25, February.
    6. Zhanjie Feng & Wenbing Guo & Feiya Xu & Daming Yang & Weiqiang Yang, 2019. "Control Technology of Surface Movement Scope with Directional Hydraulic Fracturing Technology in Longwall Mining: A Case Study," Energies, MDPI, vol. 12(18), pages 1-18, September.
    7. Bangwen Lu & Changwu Liu & Jungang Guo & Naiqi Feng, 2023. "Study on Physical and Mechanical Properties of High-Water Material Made by Seawater," Sustainability, MDPI, vol. 15(4), pages 1-13, February.
    8. Yihe Yu & Liqiang Ma, 2019. "Application of Roadway Backfill Mining in Water-Conservation Coal Mining: A Case Study in Northern Shaanxi, China," Sustainability, MDPI, vol. 11(13), pages 1-22, July.

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