Volume 43 Issue 5
Oct.  2021
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ZHANG Mingjie, YANG Shuo. Mechanical mechanism of auger drilling rod sticking in soft coal seam[J]. COAL GEOLOGY & EXPLORATION, 2015, 43(5): 121-124. DOI: 10.3969/j.issn.1001-1986.2015.05.028
Citation: ZHANG Mingjie, YANG Shuo. Mechanical mechanism of auger drilling rod sticking in soft coal seam[J]. COAL GEOLOGY & EXPLORATION, 2015, 43(5): 121-124. DOI: 10.3969/j.issn.1001-1986.2015.05.028
shu

Mechanical mechanism of auger drilling rod sticking in soft coal seam

  • 1. School of Safety Science and Engineering, Henan Polytechnic University, Jiaozuo 454003, China;

  • 2. Henan Provincial Key Laboratory of Gas Geology and Gas Control-State Key Laboratory Education Base Co-sponsored by Province and Ministry, Jiaozuo 454003, Chin

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  • Received Date: June 20, 2014
  • Available Online: October 21, 2021
    Graphical Abstract
    • Abstract
  • According to drill pipe sticking phenomenon occurring during drilling in the soft outburst-prone coal seam, this paper took the horizontal drilling hole as an example, analyzed the motion law of the drilling cutting in the helical blade during the drilling of the auger drilling rod, determined the mechanical mechanism of the sticking phenomenon that if the coal quantity of the auger drilling rod produced was greater than the ability of discharge, the drill pipe sticking phenomenon was easy to occur because of the large backlog of coal particles, and proposed a method of controlling the drilling speed, calculated the drilling critical speed of the auger rod of Φ 42 mm and Φ 75 mm. The trial conducted in 2143 up-crossheading and down-crossheading 2123 of Hebi mine six resulted in very good effect. It was shown that the method is feasible. The research has important theoretical and practical significance for coal and gas outburst prevention and control.
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