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Long-Term Stability Evaluation and Pillar Design Criterion for Room-and-Pillar Mines

Author

Listed:
  • Yang Yu

    (School of Environment Science and Spatial Information, China University of Mining and Technology, Xuzhou 221116, China)

  • Shen-en Chen

    (Department of Civil and Environmental Engineering, University of North Carolina at Charlotte, 9201 University City Blvd., Charlotte, NC 28223, USA)

  • Ka-zhong Deng

    (School of Environment Science and Spatial Information, China University of Mining and Technology, Xuzhou 221116, China)

  • Hong-dong Fan

    (School of Environment Science and Spatial Information, China University of Mining and Technology, Xuzhou 221116, China
    State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu 610059, China)

Abstract

The collapse of abandoned room-and-pillar mines is often violent and unpredictable. Safety concerns often resulted in mine closures with no post-mining stability evaluations. As a result, large amounts of land resources over room-and-pillar mines are wasted. This paper attempts to establish an understanding of the long-term stability issues of goafs (abandoned mines). Considering progressive pillar failures and the effect of single pillar failure on surrounding pillars, this paper proposes a pillar peeling model to evaluate the long-term stability of coal mines and the associated criteria for evaluating the long-term stability of room-and-pillar mines. The validity of the peeling model was verified by numerical simulation, and field data from 500 pillar cases from China, South Africa, and India. It is found that the damage level of pillar peeling is affected by the peel angle and pillar height and is controlled by the pillar width–height ratio.

Suggested Citation

  • Yang Yu & Shen-en Chen & Ka-zhong Deng & Hong-dong Fan, 2017. "Long-Term Stability Evaluation and Pillar Design Criterion for Room-and-Pillar Mines," Energies, MDPI, vol. 10(10), pages 1-13, October.
    • Handle: RePEc:gam:jeners:v:10:y:2017:i:10:p:1644-:d:115522
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    Citations

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    Cited by:

    1. Yang Yu & Shen-En Chen & Ka-Zhong Deng & Peng Wang & Hong-Dong Fan, 2018. "Subsidence Mechanism and Stability Assessment Methods for Partial Extraction Mines for Sustainable Development of Mining Cities—A Review," Sustainability, MDPI, vol. 10(1), pages 1-21, January.
    2. Benedetta Antonielli & Alessandra Sciortino & Stefano Scancella & Francesca Bozzano & Paolo Mazzanti, 2021. "Tracking Deformation Processes at the Legnica Glogow Copper District (Poland) by Satellite InSAR—I: Room and Pillar Mine District," Land, MDPI, vol. 10(6), pages 1-20, June.
    3. Hengjie Luan & Huili Lin & Yujing Jiang & Yahua Wang & Jiankang Liu & Pu Wang, 2018. "Risks Induced by Room Mining Goaf and Their Assessment: A Case Study in the Shenfu-Dongsheng Mining Area," Sustainability, MDPI, vol. 10(3), pages 1-17, February.
    4. Yihe Yu & Liqiang Ma & Dongsheng Zhang, 2019. "Characteristics of Roof Ground Subsidence While Applying a Continuous Excavation Continuous Backfill Method in Longwall Mining," Energies, MDPI, vol. 13(1), pages 1-20, December.
    5. Krzysztof Skrzypkowski, 2020. "Decreasing Mining Losses for the Room and Pillar Method by Replacing the Inter-Room Pillars by the Construction of Wooden Cribs Filled with Waste Rocks," Energies, MDPI, vol. 13(14), pages 1-20, July.

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