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Directional Hydraulic Fracturing (DHF) of the Roof, as an Element of Rock Burst Prevention in the Light of Underground Observations and Numerical Modelling

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  • Marek Jendryś

    (Department of Geomechanics and Underground Construction, Faculty of Mining, Safety Engineering and Industrial Automation, Silesian University of Technology, ul. Akademicka 2, 44-100 Gliwice, Poland)

  • Andrzej Hadam

    (“Marcel” Coal Mine, Oddział Kopalnia Węgla Kamiennego ROW, Polska Grupa Górnicza S.A., ul. Korfantego 52, 44-310 Radlin, Poland)

  • Mateusz Ćwiękała

    (“Rydułtowy” Coal Mine, Oddział Kopalnia Węgla Kamiennego ROW, Polska Grupa Górnicza S.A., ul. Leona 2, 44-280 Rydułtowy, Poland)

Abstract

The following article analyzes the effectiveness of directional hydraulic fracturing (DHF) as a method of rock burst prevention, used in black coal mining with a longwall system. In order to define changes in seismic activity due to DHF at the “Rydułtowy” Black Coal Mine (Upper Silesia, Poland), observations were made regarding the seismic activity of the rock mass during coal mining with a longwall system using roof layers collapse. The seismic activity was recorded in the area of the longwall itself, where, on a part of the runway, the rock mass was expanded before the face of the wall by interrupting the continuity of the rock layers using DHF. The following article presents measurements in the form of the number and the shock energy in the area of the observed longwall, which took place before and after the use of DHF. The second part of the article unveils the results of numerical modeling using the discrete element method, allowing to track the formation of goafs for the variant that does not take DHF into consideration, as well as with modeled fractures tracing DHF carried out in accordance with the technology used at “Rydułtowy” coal mine.

Suggested Citation

  • Marek Jendryś & Andrzej Hadam & Mateusz Ćwiękała, 2021. "Directional Hydraulic Fracturing (DHF) of the Roof, as an Element of Rock Burst Prevention in the Light of Underground Observations and Numerical Modelling," Energies, MDPI, vol. 14(3), pages 1-18, January.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:3:p:562-:d:485128
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    References listed on IDEAS

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    1. Yuantian Sun & Guichen Li & Junfei Zhang & Jiahui Xu, 2020. "Failure Mechanisms of Rheological Coal Roadway," Sustainability, MDPI, vol. 12(7), pages 1-17, April.
    2. M. S. Liew & Kamaluddeen Usman Danyaro & Noor Amila Wan Abdullah Zawawi, 2020. "A Comprehensive Guide to Different Fracturing Technologies: A Review," Energies, MDPI, vol. 13(13), pages 1-20, June.
    3. Xuewei Liu & Quansheng Liu & Bin Liu & Yongshui Kang, 2020. "A Modified Bursting Energy Index for Evaluating Coal Burst Proneness and Its Application in Ordos Coalfield, China," Energies, MDPI, vol. 13(7), pages 1-19, April.
    4. Jinrong Cao & Linming Dou & Guangan Zhu & Jiang He & Shengchuan Wang & Kunyou Zhou, 2020. "Mechanisms of Rock Burst in Horizontal Section Mining of a Steeply Inclined Extra-Thick Coal Seam and Prevention Technology," Energies, MDPI, vol. 13(22), pages 1-20, November.
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    1. Wenda Wu & Guorui Feng & Xiuxiu Yu & Jianbiao Bai & Xiangyu Wang & Xiangzhuo Zhao, 2023. "Investigation into Pressure Appearances and Hydraulic Fracturing Roof-Cutting Technology in Mining Working Face under Residual Pillars: A Case Study," Energies, MDPI, vol. 16(9), pages 1-17, May.

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