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Characteristics of Overburden Failure and Fracture Evolution in Shallow Buried Working Face with Large Mining Height

Author

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  • Xiuchang Shi

    (School of Engineering Management and Real Estate, Henan University of Economics and Law, Zhengzhou 450046, China)

  • Jixing Zhang

    (Geological Survey of Jiangsu Province, Nanjing 210018, China)

Abstract

In order to solve the issues of uncertain overburden failure height and water loss at the Daliuta coal mine, the collapse characteristics of overburden and the development height of water-conducting fractured zone were studied by using physical modeling, FLAC 3D numerical simulation, and field observation, which were used to verify each other. In order to quantitatively analyze the distribution characteristics of fracture rate of overlying rock mass in goaf, the overburden collapse image was binarized. The results showed that: (1) the failure characteristics of overburden in goaf obtained by the three research methods were roughly consistent, and the reliability of the results was high. The overburden failure height of No. 5 −2 coal with large mining height was 137.32–153 m, which was 20.8–23.2 times the mining height. (2) The repeated mining of No. 5 −2 coal intensified the further failure of the disturbed rock mass in the No. 2 −2 coal goaf. (3) In the horizontal direction of the goaf, the fracture rate of rock mass was distributed in the shape of “saddle”. In the longitudinal direction of the goaf, the rock mass fracture rate decreased in a logarithmic function with the increase of the height from the mining coal seam. Overall, the conclusions are of engineering significance for accurately adopting water resources protection mining technology and reducing mine water inrush disasters.

Suggested Citation

  • Xiuchang Shi & Jixing Zhang, 2021. "Characteristics of Overburden Failure and Fracture Evolution in Shallow Buried Working Face with Large Mining Height," Sustainability, MDPI, vol. 13(24), pages 1-19, December.
    • Handle: RePEc:gam:jsusta:v:13:y:2021:i:24:p:13775-:d:701777
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    References listed on IDEAS

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    1. Qingxiang Huang & Yanpeng He & Jian Cao, 2019. "Experimental Investigation on Crack Development Characteristics in Shallow Coal Seam Mining in China," Energies, MDPI, vol. 12(7), pages 1-16, April.
    2. Wenbing Guo & Mingjie Guo & Yi Tan & Erhu Bai & Gaobo Zhao, 2019. "Sustainable Development of Resources and the Environment: Mining-Induced Eco-Geological Environmental Damage and Mitigation Measures—A Case Study in the Henan Coal Mining Area, China," Sustainability, MDPI, vol. 11(16), pages 1-34, August.
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    Cited by:

    1. Hongyan Qin & Jingui Zhang & Zhiheng Cheng & Zhenhua Ouyang & Liang Chen & Haiyang Yi & Xidong Zhao & Yang Li & Hao Liu, 2022. "Research on Overburden Failure Characteristics Based on the Theory of Plates and Shells," Sustainability, MDPI, vol. 14(18), pages 1-16, September.
    2. Xiuchang Shi & Guangluo Lyu, 2023. "Mechanism of Bed Separation Water Inrush during the Mining of Extra-Thick Coal Seam under Super-Thick Sandstone Aquifer," Sustainability, MDPI, vol. 15(13), pages 1-17, July.
    3. Erhu Bai & Wenbing Guo & Yi Tan & Mingjie Guo & Peng Wen & Zhiqiang Liu & Zhibao Ma & Weiqiang Yang, 2022. "Regional Division and Its Criteria of Mining Fractures Based on Overburden Critical Failure," Sustainability, MDPI, vol. 14(9), pages 1-15, April.
    4. Zheng Wu & Jun Li & Wen-Long Zhang & Chen Li, 2022. "Analysis of the Failure Characteristics and Main Controlling Factors of Surrounding Rocks Using the Standard Specimen with a Pre-Existing Hole," Sustainability, MDPI, vol. 14(21), pages 1-18, November.

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