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Tests of Geometry of the Powered Roof Support Section

Author

Listed:
  • Dawid Szurgacz

    (DOH Hydraulics Center, 41-906 Bytom, Poland)

  • Jarosław Brodny

    (Faculty of Organization and Management, Silesian University of Technology, 44-100 Gliwice, Poland)

Abstract

A powered roof support is a basic protection mean for longwall excavations in which highly efficient mining is carried out. The support operates properly when its individual sections are spragged correctly in a working and their operating parameters meet specific requirements. The geometry of the section, and in particular, the correct position of the floor base and the canopy, have a significant impact on the parameters and effectiveness of its work. Disturbances in this area, in many cases, are the cause of damage and improper operation of the support. Therefore, a new method of testing the position of the section in a longwall was developed based on an analysis of its geometry. The basis of this method are inclinometers (angle sensors) mounted on the main structural elements of the section. Recorded values of the angles of inclination of these elements and the developed analytical models are used to determine the positioning of the section in a longwall. The main purpose of the research was to develop a method that would allow, in the simplest possible way, the analysis of section geometry in real conditions. A simplified analytical model was used to determine the actual geometry of the section. It was used then as a basis of an analysis of possible states of the position of the section in the mining wall, including the surrounding rock mass. The results were applied during tests of the section carried out in a testing station and in real (underground) conditions. The developed measuring system helped to determine selected geometrical parameters of the section during these tests. The purpose of the research was to verify the developed model and demonstrate that the geometry of the section has a significant impact on its uneven loading. The obtained results, especially from underground tests, confirmed that during operation the support sections are twisted, which may cause overloading of their construction and disturbance of the operation process. The developed method of testing the geometry of the section is a new approach to analyzing the work of the powered roof support operating in variable mining and geological conditions. The developed method of testing the position of the section based on the angle of inclination of its individual elements is undoubtedly a new approach to this research area. The results obtained should be successfully used in practice to optimize the support section and when selecting support for specific working conditions.

Suggested Citation

  • Dawid Szurgacz & Jarosław Brodny, 2019. "Tests of Geometry of the Powered Roof Support Section," Energies, MDPI, vol. 12(20), pages 1-19, October.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:20:p:3945-:d:277521
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    References listed on IDEAS

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    1. Magdalena Tutak & Jarosław Brodny, 2018. "Analysis of the Impact of Auxiliary Ventilation Equipment on the Distribution and Concentration of Methane in the Tailgate," Energies, MDPI, vol. 11(11), pages 1-28, November.
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    Cited by:

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    2. Faham Tahmasebinia & Chengguo Zhang & Ismet Canbulat & Samad Sepasgozar & Serkan Saydam, 2020. "A Novel Damage Model for Strata Layers and Coal Mass," Energies, MDPI, vol. 13(8), pages 1-17, April.
    3. Xiaoping Xie & Hongyang Liu & Xinqiu Fang & Junwei Yang & Jiangang Liu & Minfu Liang & Gang Wu, 2023. "Deformation Mechanism and Control Technology of Surrounding Rock of Three-Soft Coal Roadways under High Horizontal Stress," Energies, MDPI, vol. 16(2), pages 1-23, January.
    4. Yang Yu & Jianbiao Bai & Xiangyu Wang & Lianying Zhang, 2020. "Control of the Surrounding Rock of a Goaf-Side Entry Driving Heading Mining Face," Sustainability, MDPI, vol. 12(7), pages 1-16, March.
    5. Peng Li & Xingping Lai & Peilin Gong & Chao Su & Yonglu Suo, 2020. "Mechanisms and Applications of Pressure Relief by Roof Cutting of a Deep-Buried Roadway near Goafs," Energies, MDPI, vol. 13(21), pages 1-16, November.
    6. Yuantian Sun & Guichen Li & Junfei Zhang & Deyu Qian, 2019. "Stability Control for the Rheological Roadway by a Novel High-Efficiency Jet Grouting Technique in Deep Underground Coal Mines," Sustainability, MDPI, vol. 11(22), pages 1-17, November.
    7. Magdalena Tutak, 2019. "The Influence of the Permeability of the Fractures Zone Around the Heading on the Concentration and Distribution of Methane," Sustainability, MDPI, vol. 12(1), pages 1-24, December.
    8. Feng Cui & Yanbin Yang & Xingping Lai & Chong Jia & Pengfei Shan, 2019. "Experimental Study on the Effect of Advancing Speed and Stoping Time on the Energy Release of Overburden in an Upward Mining Coal Working Face with a Hard Roof," Sustainability, MDPI, vol. 12(1), pages 1-23, December.
    9. Rasa Smaliukiene & Svajone Bekesiene, 2020. "Towards Sustainable Human Resources: How Generational Differences Impact Subjective Wellbeing in the Military?," Sustainability, MDPI, vol. 12(23), pages 1-21, November.
    10. 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.
    11. Houqiang Yang & Changliang Han & Nong Zhang & Changlun Sun & Dongjiang Pan & Minghui Dong, 2019. "Stability Control of a Goaf-Side Roadway under the Mining Disturbance of an Adjacent Coal Working Face in an Underground Mine," Sustainability, MDPI, vol. 11(22), pages 1-18, November.

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