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Optimization and Practice of Support Working Resistance in Fully-Mechanized Top Coal Caving in Shallow Thick Seam

Author

Listed:
  • Peng Huang

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

  • Feng Ju

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

  • Kashi Vishwanath Jessu

    (Western Australia School of Mines, Curtin University, Kalgoorlie, WA 6430, Australia)

  • Meng Xiao

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

  • Shuai Guo

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

Abstract

Based on the overburdened structure of shallow coal seams in the West of China, the traditional support resistance method may not apply in such regions due to many roof shear and support crushing accidents. Four support working resistance indexes—rated working resistance, average working resistance, average-partial working resistance, and average-upper working resistance are counted as the candidate working resistance. The method of optimizing and inverting working resistance was put forward based on the roof control effect and working resistance overrun percentage. The simulation of a fully-mechanized top coal caving working face was built by using the UDEC software to analyze the top coal cavability and roof subsidence under different supporting strengths to determine the final working resistance. The project practice of 1322 working face in Jindi coal mine shows that the working resistance is 80–90% of calculated rated working resistance. The hydraulic support is worked under good condition. There is no pillar shrinkage and support crushing during coal mining.

Suggested Citation

  • Peng Huang & Feng Ju & Kashi Vishwanath Jessu & Meng Xiao & Shuai Guo, 2017. "Optimization and Practice of Support Working Resistance in Fully-Mechanized Top Coal Caving in Shallow Thick Seam," Energies, MDPI, vol. 10(9), pages 1-12, September.
    • Handle: RePEc:gam:jeners:v:10:y:2017:i:9:p:1406-:d:111902
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    Citations

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    Cited by:

    1. Jun Guo & Guorui Feng & Pengfei Wang & Tingye Qi & Xiaorong Zhang & Yonggan Yan, 2018. "Roof Strata Behavior and Support Resistance Determination for Ultra-Thick Longwall Top Coal Caving Panel: A Case Study of the Tashan Coal Mine," Energies, MDPI, vol. 11(5), pages 1-19, April.
    2. Dengfeng Yang, 2021. "Analysis of Fracture Mechanics Theory of the First Fracture Mechanism of Main Roof and Support Resistance with Large Mining Height in a Shallow Coal Seam," Sustainability, MDPI, vol. 13(4), pages 1-24, February.
    3. Zhu Li & Jialin Xu & Shengchao Yu & Jinfeng Ju & Jingmin Xu, 2018. "Mechanism and Prevention of a Chock Support Failure in the Longwall Top-Coal Caving Faces: A Case Study in Datong Coalfield, China," Energies, MDPI, vol. 11(2), pages 1-17, January.

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