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Study on the Pressure-Bearing Law of Backfilling Material Based on Three-Stage Strip Backfilling Mining

Author

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  • Xiaoping Shao

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

  • Xin Li

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

  • Long Wang

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

  • Zhiyu Fang

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

  • Bingchao Zhao

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

  • Ershuai Liu

    (Shaanxi Coal Yubei Coal Industry Co., Ltd., Yulin 719000, China)

  • Yeqing Tao

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

  • Lang Liu

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

Abstract

During strip backfilling mining in coal mines, the backfilling material is the main support structure. Therefore, studying the pressure law of the backfilling material is essential for the safe and efficient mining of coal resources. Based on research into strip backfilling mining at working face number 3216 of the Shanghe Coal Mine, and to smooth transition of overlying strata loads to the backfilling material, this study proposes a three-stage strip backfilling mining method. Based on thin-plate theory, an elastic thin-plate model, a reasonable spacing of strip mining is constructed, and the reasonable mining parameters of “mining 7 m to retain 8 m” at working face number 3216 of the Shanghe Coal Mine are determined. The law of backfilling pressure in three-stage strip backfilling mining is studied through numerical simulation and physical simulation experiments. The results show that field measurement results are basically consistent with the experimental results and numerical simulation results. When three-stage strip backfilling mining is adopted, the stage-one backfilling material is the main bearing body to which the overlying rock load transfers smoothly and gradually, and the structure of the “overburden-coal pillar (or backfilling strip)” in the stope remains stable. In three-stage strip backfilling mining, the overlying rock load is ultimately transferred to the stage-one backfilling material, the stage-two backfilling material is the auxiliary bearing body, and the stage-three backfilling material mainly provides long-term stable lateral support for the stage-one backfilling material.

Suggested Citation

  • 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.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:1:p:211-:d:304331
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    References listed on IDEAS

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    Cited by:

    1. Shuai Li & Zheng Yu & Haoxuan Yu & Xinmin Wang, 2022. "The Recent Progress China Has Made in High-Concentration Backfill," Sustainability, MDPI, vol. 14(5), pages 1-18, February.
    2. Xiaoping Shao & Long Wang & Xin Li & Zhiyu Fang & Bingchao Zhao & Yeqing Tao & Lang Liu & Wuliang Sun & Jianpeng Sun, 2020. "Study on Rheological and Mechanical Properties of Aeolian Sand-Fly Ash-Based Filling Slurry," Energies, MDPI, vol. 13(5), pages 1-13, March.
    3. Krzysztof Skrzypkowski, 2021. "3D Numerical Modelling of the Application of Cemented Paste Backfill on Displacements around Strip Excavations," Energies, MDPI, vol. 14(22), pages 1-17, November.
    4. Weijun Liu & Zhixiang Liu & Zida Liu & Shuai Xiong & Shuangxia Zhang, 2023. "Random Forest and Whale Optimization Algorithm to Predict the Invalidation Risk of Backfilling Pipeline," Mathematics, MDPI, vol. 11(7), pages 1-19, March.

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