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A Vertical Joint Spacing Calculation Method for UDEC Modeling of Large-Scale Strata and Its Influence on Mining-Induced Surface Subsidence

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  • Yaqiang Gong

    (School of Environment Science and Spatial Informatics, China University of Mining and Technology, Xuzhou 221116, China
    State Key Laboratory for Geomechanics and Deep Underground Engineering, Xuzhou 221116, China)

  • Guangli Guo

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

  • Guojian Zhang

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

  • Kaikai Guo

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

  • Qiu Du

    (School of Environment Science and Spatial Informatics, China University of Mining and Technology, Xuzhou 221116, China
    State Key Laboratory for Geomechanics and Deep Underground Engineering, Xuzhou 221116, China)

  • Liping Wang

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

Abstract

While universal discrete element code (UDEC) is widely used for understanding the mechanism of large-scale strata movement and the effects of mining subsidence on the environment, the fundamental knowledge of how to set vertical joint spacing (VJS) in UDEC is still not fully understood. To address the knowledge gap, we first present a novel VJS calculation method, then conduct UDEC experiments, and finally compare the predictions of UDEC models with field subsidence observation. The results suggest the following: (1) when compared to the conventional VJS setting (1× to 3× bed thickness), the maximum surface subsidence (MSS) prediction via UDEC models based on our proposed VJS setting method is closer to field observation; (2) a smaller but varying VJS setting can also have the effect of a larger VJS setting; and (3) with the increase in VJS, MSS first drops, then rises, and reaches the minimum when VJS is set at approximately 7× bed thickness. This paper provides an explanation of the VJS setting in UDEC and establishes a bridge between the KS theory and VJS, which is helpful for the sustainable development of such an UDEC modeling strategy and for a better understanding of the influences of mining subsidence on the environment in mining-affected areas.

Suggested Citation

  • Yaqiang Gong & Guangli Guo & Guojian Zhang & Kaikai Guo & Qiu Du & Liping Wang, 2021. "A Vertical Joint Spacing Calculation Method for UDEC Modeling of Large-Scale Strata and Its Influence on Mining-Induced Surface Subsidence," Sustainability, MDPI, vol. 13(23), pages 1-14, December.
  • Handle: RePEc:gam:jsusta:v:13:y:2021:i:23:p:13313-:d:692855
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    References listed on IDEAS

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    1. Qingbiao Guo & Guangli Guo & Yingming Li & Lei Wang & Xingwang Zhao, 2019. "Stability Evaluation of an Expressway Construction Site above an Abandoned Coal Mine Based on the Overlay and Index Method," Sustainability, MDPI, vol. 11(19), pages 1-19, September.
    2. Wei-bin Guo & Hong-sheng Wang & Guo-wei Dong & Lei Li & Yao-guang Huang, 2017. "A Case Study of Effective Support Working Resistance and Roof Support Technology in Thick Seam Fully-Mechanized Face Mining with Hard Roof Conditions," Sustainability, MDPI, vol. 9(6), pages 1-17, June.
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    Cited by:

    1. Yaqiang Gong & Guangli Guo & Liping Wang & Guojian Zhang & Guangxue Zhang & Zhen Fang, 2022. "Numerical Study on the Surface Movement Regularity of Deep Mining Underlying the Super-Thick and Weak Cementation Overburden: A Case Study in Western China," Sustainability, MDPI, vol. 14(3), pages 1-14, February.
    2. Haiqing Shuang & Weitao Meng & Yulong Zhai & Peng Xiao & Yu Shi & Yu Tian, 2022. "Application and Optimization of the Parameters of the High-Level Boreholes in Lateral High Drainage Roadway," Sustainability, MDPI, vol. 14(24), pages 1-18, December.

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