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Safe and Efficient Coal Mining Below the Goaf: A Case Study

Author

Listed:
  • Weidong Pan

    (School of Energy and Mining Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China)

  • Shaopeng Zhang

    (School of Energy and Mining Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China)

  • Yi Liu

    (School of Energy and Mining Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China)

Abstract

Mining at the fully mechanized working face below the goaf of the short-distance coal seam is influenced by the upper goaf. To address this problem, methods such as theoretical analyses, numerical simulation, and on-site measurement are used to study the strata behavior characteristics of the Ningxia Lingxin Coal Mine 051508 working face in this study. The roof weighting intervals of the working faces below the goaf and the non-goaf are obtained via theoretical calculations. The stoping processes of the working faces below the goaf and the non-goaf are simulated with FLAC 3D to obtain the distribution law of the bearing pressure and plastic zones before the working face. Based on the statistical analysis of the measured working resistance of the supports and its distribution, the roof weighting interval of the working face mining below the goaf is obtained. The results show that the roof weighting interval and the advanced abutment pressure during mining at the working face below the goaf are smaller than those below the non-goaf, providing a reasonable theoretical basis for mining below the goaf, and having important significance for safe and efficient mining.

Suggested Citation

  • Weidong Pan & Shaopeng Zhang & Yi Liu, 2020. "Safe and Efficient Coal Mining Below the Goaf: A Case Study," Energies, MDPI, vol. 13(4), pages 1-15, February.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:4:p:864-:d:321356
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    Citations

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    Cited by:

    1. Florencio Fernández-Alaiz & Ana Maria Castañón & Fernando Gómez-Fernández & Antonio Bernardo-Sánchez & Marc Bascompta, 2020. "Determination and Fire Analysis of Gob Characteristics Using CFD," Energies, MDPI, vol. 13(20), pages 1-11, October.
    2. Shengrong Xie & Yiyi Wu & Fangfang Guo & Dongdong Chen & En Wang & Xiao Zhang & Hang Zou & Ruipeng Liu & Xiang Ma & Shijun Li, 2022. "Interaction Mechanism of the Upper and Lower Main Roofs with Different Properties in Close Coal Seams: A Case Study," Energies, MDPI, vol. 15(15), pages 1-21, July.
    3. Song Shi & Yichen Miao & Haikuan Wu & Zhipeng Xu & Changwu Liu, 2022. "The Stress Evolution of Adjacent Working Faces Passing through an Abandoned Roadway and the Damage Depth of the Floor," Energies, MDPI, vol. 15(16), pages 1-17, August.
    4. Fulian He & Bingquan Liu & Deqiu Wang & Dongdong Chen & Yanhao Wu & Liming Song & Xiang Ma & Qiucheng Ye & Zaisheng Jiang & Fangfang Guo & Weiguang Wang & Yiyi Wu, 2022. "Study on Stability and Control of Surrounding Rock in the Stopping Space with Fully Mechanized Top Coal Caving under Goaf," Energies, MDPI, vol. 15(22), pages 1-22, November.

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