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Reasonable Working-Face Size Based on Full Mining of Overburden Failure

Author

Listed:
  • Ziwei Ding

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

  • Shaoyi Wang

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

  • Jinglong Liao

    (Shaanxi Coal and Chemical Industry Group Co., Ltd., Xi’an 710100, China)

  • Liang Li

    (Shaanxi Coal and Chemical Industry Group Co., Ltd., Xi’an 710100, China)

  • Jindui Jia

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

  • Qingbao Tang

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

  • Xiaofei Li

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

  • Chengdeng Gao

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

Abstract

To improve production efficiency and prevent potential disasters in coal mines, comprehensive research methods such as similar simulation, numerical simulation, theoretical analysis, and on-site detection were used in this study. The migration characteristics of overburden rock under different working face lengths and development heights of water-conducting fracture zones were investigated via these methods in order to determine the reasonable length of the working face. The results show that the regularity of the development height of water-conducting fracture zones in similar simulations and numerical simulations is highly consistent, and the final stable values are 48 and 50 m. When the working face length was 300 m, the error between the simulated value and the value calculated from the formula dropped below 10% and exhibited a further decreasing trend; as a result, the working face length of 300 m was found to be the turning point for the development height of the water-conducting fracture zone to become stable. Based on the simulation results and mining damage theory, the critical size of the working face was 307.6 m, and the height of the water-conducting fracture zone was determined to be in the range of 45.5–60.5 m. The actual detection result of the height of the water-conducting fracture zone under the critical size of the working face was 55 m, which conforms to the law obtained from the simulation. Finally, the reasonable working face length under the geological conditions of a coal mine was determined to be 300–400 m. This study offers important reference value for determining the reasonable working face length under similar geological conditions, and may have significance for the sustainable development of coal resource mining.

Suggested Citation

  • Ziwei Ding & Shaoyi Wang & Jinglong Liao & Liang Li & Jindui Jia & Qingbao Tang & Xiaofei Li & Chengdeng Gao, 2023. "Reasonable Working-Face Size Based on Full Mining of Overburden Failure," Sustainability, MDPI, vol. 15(4), pages 1-13, February.
    • Handle: RePEc:gam:jsusta:v:15:y:2023:i:4:p:3351-:d:1065768
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    References listed on IDEAS

    as
    1. Donghai Jiang & Yinfeng Tang & Wanpeng Huang & Keke Hou & Yi Luo & Jiangwei Liu, 2022. "Research on the Height of the Water-Conducting Fracture Zone in Fully Mechanized Top Coal Caving Face under Combined-Strata Structure," Sustainability, MDPI, vol. 14(21), pages 1-20, October.
    2. Wen Zhai & Wei Li & Yanli Huang & Shenyang Ouyang & Kun Ma & Junmeng Li & Huadong Gao & Peng Zhang, 2020. "A Case Study of the Water Abundance Evaluation of Roof Aquifer Based on the Development Height of Water-Conducting Fracture Zone," Energies, MDPI, vol. 13(16), pages 1-16, August.
    3. Huiyong Yin & Fangying Dong & Yiwen Zhang & Wenju Cheng & Peihe Zhai & Xuyan Ren & Ziang Liu & Yutao Zhai & Xin Li, 2022. "Height Prediction and 3D Visualization of Mining-Induced Water-Conducting Fracture Zone in Western Ordos Basin Based on a Multi-Factor Regression Analysis," Energies, MDPI, vol. 15(11), pages 1-16, May.
    4. Feng Du & Rui Gao, 2017. "Development Patterns of Fractured Water-Conducting Zones in Longwall Mining of Thick Coal Seams—A Case Study on Safe Mining Under the Zhuozhang River," Energies, MDPI, vol. 10(11), pages 1-16, November.
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