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Research on the Height of the Water-Conducting Fracture Zone in Fully Mechanized Top Coal Caving Face under Combined-Strata Structure

Author

Listed:
  • Donghai Jiang

    (College of Energy and Mining Engineering, Shandong University of Science and Technology, Qingdao 266590, China)

  • Yinfeng Tang

    (College of Energy and Mining Engineering, Shandong University of Science and Technology, Qingdao 266590, China)

  • Wanpeng Huang

    (College of Energy and Mining Engineering, Shandong University of Science and Technology, Qingdao 266590, China)

  • Keke Hou

    (College of Energy and Mining Engineering, Shandong University of Science and Technology, Qingdao 266590, China)

  • Yi Luo

    (Shanxi Gaohe Energy Co., Ltd., Changzhi 046000, China)

  • Jiangwei Liu

    (College of Energy and Mining Engineering, Shandong University of Science and Technology, Qingdao 266590, China)

Abstract

In order to study the development height of the water-conducting fracture zone in a fully mechanized top coal caving face. The E2311 working face of Gaohe Coal Mine was chosen as the research object, and the combined-strata structure and the rock layer synergistic movement mechanism were determined by combining engineering geological investigation and theoretical analysis. The height of the water-conducting fracture zone at the working face was calculated based on the combined-strata structure, and then the theoretical results were verified by numerical simulation and field measurement. The results show that after the coal seam is extracted from the working face, the movement of the overlying rock layers is in the form of bending and sinking movement of the rock layer group as a unit. Each rock layer group is controlled by a supportive lower layer with greater thickness and strength, driving the upper layers of weaker rock layers to synchronize and coordinate the movement; the sinking curvature is the same, after the lowermost support layer is bent and broken, its overlying weaker rock layers will move and break at the same time. The height of the water-conducting fracture zone of the working face were obtained by theoretical calculation, numerical simulation, and field measurements, which are 83.82 m, 84.3 m, and 86.6 m, respectively. The results are nearly consistent, thus the prediction of the height of the water-conducting fracture zone under the combined-strata structure is more accurate.

Suggested Citation

  • Donghai Jiang & Yinfeng Tang & Wanpeng Huang & Keke Hou & Yi Luo & Jiangwei Liu, 2022. "Research on the Height of the Water-Conducting Fracture Zone in Fully Mechanized Top Coal Caving Face under Combined-Strata Structure," Sustainability, MDPI, vol. 14(21), pages 1-20, October.
    • Handle: RePEc:gam:jsusta:v:14:y:2022:i:21:p:13781-:d:951770
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    References listed on IDEAS

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    1. Krzysztof Skrzypkowski & Krzysztof Zagórski & Anna Zagórska, 2021. "Determination of the Extent of the Rock Destruction Zones around a Gasification Channel on the Basis of Strength Tests of Sandstone and Claystone Samples Heated at High Temperatures up to 1200 °C and ," Energies, MDPI, vol. 14(20), pages 1-27, October.
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    Cited by:

    1. Ziwei Ding & Shaoyi Wang & Jinglong Liao & Liang Li & Jindui Jia & Qingbao Tang & Xiaofei Li & Chengdeng Gao, 2023. "Reasonable Working-Face Size Based on Full Mining of Overburden Failure," Sustainability, MDPI, vol. 15(4), pages 1-13, February.

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