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Research on Catastrophic Pillar Instability in Room and Pillar Gypsum Mining

Author

Listed:
  • Yuejin Zhou

    (State Key Laboratory for Geomechanics & Deep Underground Engineering, China University of Mining & Technology, Xuzhou 221116, Jiangsu, China)

  • Meng Li

    (School of Mining Engineering, China University of Mining & Technology, Xuzhou 221116, Jiangsu, China)

  • Xiaoding Xu

    (State Key Laboratory for Geomechanics & Deep Underground Engineering, China University of Mining & Technology, Xuzhou 221116, Jiangsu, China)

  • Xiaotong Li

    (State Key Laboratory for Geomechanics & Deep Underground Engineering, China University of Mining & Technology, Xuzhou 221116, Jiangsu, China)

  • Yongdong Ma

    (State Key Laboratory for Geomechanics & Deep Underground Engineering, China University of Mining & Technology, Xuzhou 221116, Jiangsu, China)

  • Zhanguo Ma

    (State Key Laboratory for Geomechanics & Deep Underground Engineering, China University of Mining & Technology, Xuzhou 221116, Jiangsu, China)

Abstract

Gypsum mines in China are mostly exploited through room and pillar mining. Due to backward mining technology and a long history of mining, a great number of pillars were left in gypsum mines. Many serious work safety accidents occurred as the result of goaf instability in history, which posed severe threats to the security of people’s lives and property. Based on the characteristics of surrounding rock damage, this research improved the constitutive equation of gypsum rock mass damage by establishing a damage evolution model and introducing a shape parameter. Meanwhile, the cusp catastrophe equation was deduced based on the catastrophe theory and the constitutive equation of gypsum rock mass damage, thus summarizing the criteria for pillar instability; the pillar safety factor was obtained by means of the interrelation between pillar load and pillar strength. Based on the criteria for pillar instability and the pillar safety factor obtained, the necessary and sufficient conditions for pillar stability were concluded. These conclusions are of significance in that they provide theoretic reference for the treatment of gypsum goaf, as well as for further mining.

Suggested Citation

  • Yuejin Zhou & Meng Li & Xiaoding Xu & Xiaotong Li & Yongdong Ma & Zhanguo Ma, 2018. "Research on Catastrophic Pillar Instability in Room and Pillar Gypsum Mining," Sustainability, MDPI, vol. 10(10), pages 1-11, October.
    • Handle: RePEc:gam:jsusta:v:10:y:2018:i:10:p:3773-:d:176709
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    Citations

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    Cited by:

    1. Krzysztof Skrzypkowski & Waldemar Korzeniowski & Krzysztof Zagórski & Anna Zagórska, 2019. "Flexibility and Load-Bearing Capacity of Roof Bolting as Functions of Mounting Depth and Hole Diameter," Energies, MDPI, vol. 12(19), pages 1-23, September.
    2. Nan Zhou & Hao Yan & Shuyin Jiang & Qiang Sun & Shenyang Ouyang, 2019. "Stability Analysis of Surrounding Rock in Paste Backfill Recovery of Residual Room Pillars," Sustainability, MDPI, vol. 11(2), pages 1-13, January.
    3. Yongxiang Ge & Congrui Zhang & Gaofeng Ren & Luwei Zhang, 2022. "Experimental Investigation of the Mechanical Behavior and Damage Evolution Mechanism of Oil-Impregnated Gypsum Rock," Sustainability, MDPI, vol. 14(18), pages 1-15, September.
    4. Weizhang Liang & Suizhi Luo & Guoyan Zhao & Hao Wu, 2020. "Predicting Hard Rock Pillar Stability Using GBDT, XGBoost, and LightGBM Algorithms," Mathematics, MDPI, vol. 8(5), pages 1-17, May.

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