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A Disturbed Voussoir Beam Structure Mechanical Model and Its Application in Feasibility Determination of Upward Mining

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  • Yujiang Zhang

    (College of Mining Engineering, Taiyuan University of Technology, Taiyuan 030024, China
    Shanxi Province Coal-Based Resources Green and High-Efficiency Development Engineering Center, Taiyuan 030024, China
    Postdoctoral Centre, Shandong Energy Group Co., Ltd., Jinan 250014, China)

  • Yining Wang

    (College of Mining Engineering, Taiyuan University of Technology, Taiyuan 030024, China
    Shanxi Province Coal-Based Resources Green and High-Efficiency Development Engineering Center, Taiyuan 030024, China)

  • Bingyuan Cui

    (College of Mining Engineering, Taiyuan University of Technology, Taiyuan 030024, China
    Shanxi Province Coal-Based Resources Green and High-Efficiency Development Engineering Center, Taiyuan 030024, China)

  • Guorui Feng

    (College of Mining Engineering, Taiyuan University of Technology, Taiyuan 030024, China
    Shanxi Province Coal-Based Resources Green and High-Efficiency Development Engineering Center, Taiyuan 030024, China)

  • Shuai Zhang

    (College of Mining Engineering, Taiyuan University of Technology, Taiyuan 030024, China
    Shanxi Province Coal-Based Resources Green and High-Efficiency Development Engineering Center, Taiyuan 030024, China)

  • Chunwang Zhang

    (College of Mining Engineering, Taiyuan University of Technology, Taiyuan 030024, China
    Shanxi Province Coal-Based Resources Green and High-Efficiency Development Engineering Center, Taiyuan 030024, China)

  • Zhengjun Zhang

    (Yangcheng County Yangtai Group Industrial Co., Ltd., Jincheng 048100, China)

Abstract

China is endowed with a large quantity of residual coal resources that require upward mining. The stability of interburden strata structures and accurate determination are crucial for safe mining. Therefore, we established a mechanical model of disturbed voussoir beam structures of interburden strata in upward mining. The model was solved, and stability analysis and instability mechanism analysis were conducted. Based on this model, a new method for determining the feasibility of upward mining was proposed and applied to the upward mining of coal seam No. 7 in Baijiazhuang Coal Mine. A physical simulation experiment and numerical simulation were conducted to validate the method. Through research, it was found that the model had two instability mechanisms: rotation instability and sliding instability. When the disturbance load crossed the critical block of the structures, the model was most likely to experience sliding instability. When the disturbance load acted entirely on the critical block, rotation instability was more likely to occur. The result of the determination, performed using the new method, showed that there was no rotation instability or sliding instability in the interburden strata structures of coal seam No. 7, indicating that the coal seam could be mined upward. This result was consistent with the determinations using the statistical method, “three-zone” method, and balanced surrounding rock method. Physical and numerical simulations revealed that the upward mining of coal seam No. 7 caused the subsidence, rotation, and separation compaction of the interburden strata structures but that the structures remained stable. The results indicate that the proposed model and method have accuracy and applicability, being able to guide the practical feasibility determination of upward mining.

Suggested Citation

  • Yujiang Zhang & Yining Wang & Bingyuan Cui & Guorui Feng & Shuai Zhang & Chunwang Zhang & Zhengjun Zhang, 2023. "A Disturbed Voussoir Beam Structure Mechanical Model and Its Application in Feasibility Determination of Upward Mining," Energies, MDPI, vol. 16(20), pages 1-18, October.
  • Handle: RePEc:gam:jeners:v:16:y:2023:i:20:p:7190-:d:1264675
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    References listed on IDEAS

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    1. Adam Smoliński & Dmyto Malashkevych & Mykhailo Petlovanyi & Kanay Rysbekov & Vasyl Lozynskyi & Kateryna Sai, 2022. "Research into Impact of Leaving Waste Rocks in the Mined-Out Space on the Geomechanical State of the Rock Mass Surrounding the Longwall Face," Energies, MDPI, vol. 15(24), pages 1-16, December.
    2. Zbigniew Burtan & Dariusz Chlebowski, 2022. "The Effect of Mining Remnants on Elastic Strain Energy Arising in the Tremor-Inducing Layer," Energies, MDPI, vol. 15(16), pages 1-18, August.
    3. Oksana Marinina & Anna Nechitailo & Gennady Stroykov & Anna Tsvetkova & Ekaterina Reshneva & Liudmila Turovskaya, 2023. "Technical and Economic Assessment of Energy Efficiency of Electrification of Hydrocarbon Production Facilities in Underdeveloped Areas," Sustainability, MDPI, vol. 15(12), pages 1-25, June.
    4. Zhang, Yujiang & Feng, Guorui & Zhang, Min & Ren, Hongrui & Bai, Jinwen & Guo, Yuxia & Jiang, Haina & Kang, Lixun, 2016. "Residual coal exploitation and its impact on sustainable development of the coal industry in China," Energy Policy, Elsevier, vol. 96(C), pages 534-541.
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    Cited by:

    1. Shihao Guo & Shanchao Hu & Junhong Huang & Zhihao Gao & Yafei Cheng & Jinming Han & Lei Yang, 2023. "Stability Control Technology for Surrounding Rocks in Gob-Side Entry Driving with Small Coal Pillars under Dynamic Pressure," Energies, MDPI, vol. 16(23), pages 1-24, December.

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