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The Sustainable Development of Aged Coal Mine Achieved by Recovering Pillar-Blocked Coal Resources

Author

Listed:
  • Huadong Gao

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

  • Baifu An

    (State Key Laboratory of Coal Resources and Safe Mining, School of Mines, China University of Mining & Technology, Xuzhou 221116, China
    Work Safety Key Lab on Prevention and Control of Gas and Roof Disasters for Southern Coal Mines, Hunan University of Science and Technology, Xiangtan 411201, China)

  • Zhen Han

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

  • Yachao Guo

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

  • Zeyu Ruan

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

  • Wei Li

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

  • Samuel Zayzay

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

Abstract

China faces the problem of depletion of its coal resources, and a large number of mines are becoming aged mines. Demand for coal, however, still increases due to the growth of China’s economy. Energy shortage might restrict the sustainability of China’s national economy. As one contribution to a solution, this paper proposes the innovative exploitation method of solid backfill coal mining (SBCM) technology to exploit parts of pillar-blocked (residual coal pillar resources under industrial square, RCPRIS) that protect industrial facilities. Thus, blocked coal resources may be converted into mineable reserves that improve the recovery ratio of mine resources. Also, waste would be removed from the surface reducing hazards of environmental pollution. Based on the case of the Baishan Coal Mine in Anhui, China, numerical simulation is used to study the size of shaft-protecting coal pillars (SPCP) required at different backfill ratios. Results show that the disturbance to a shaft caused by exploitation decreases with the increase of the backfill ratio. When using SBCM to exploit RCPRIS under the condition of 80% backfill ratio, compared with the caving method, a lot of pillar-blocked coal resources would be freed. The life of Baishan Coal Mine would be prolonged, resulting in appreciable social, environmental, and economic benefits.

Suggested Citation

  • Huadong Gao & Baifu An & Zhen Han & Yachao Guo & Zeyu Ruan & Wei Li & Samuel Zayzay, 2020. "The Sustainable Development of Aged Coal Mine Achieved by Recovering Pillar-Blocked Coal Resources," Energies, MDPI, vol. 13(15), pages 1-12, July.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:15:p:3912-:d:392604
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    References listed on IDEAS

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    1. Lucas Reijnders, 2022. "Defining and Operationalizing Sustainability in the Context of Energy," Energies, MDPI, vol. 15(14), pages 1-9, July.

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