Drill Rod Lateral Vibration Mechanics during Mining Horizontal Drilling for Gas Drainage

Abstract:

Through the condition analysis of the drill rod during the mining horizontal drilling for gas drainage, the finite element model of the drill rod lateral vibration is established. The drill rod lateral vibration is related to the diameter and length of the drill rod. With the increase of the diameter of the drill rod, the natural frequency of the lateral vibration of the drill rod increases constantly. The increasing amplitude of the natural frequency at the larger diameter of the drill rod is larger than that at the smaller diameter. When the drill rod is longer, the natural frequency of the lateral vibration of the drill rod is lower. From the modal images of the drill rod, the lateral vibration of the drill rod is similar to the sine curve. During the horizontal drilling in coal seam, the drill rod contact and impact with the hole wall which will bring about the fatigue fault of the drill rod and the collapse of the hole wall.

• Periodical: Advanced Materials Research (Volume 1027)
• Pages: 302-305
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1027.302
• Online since: October 2014
• Authors: Xiao Ming Han*, Dong Sheng Li, Long Lie Zhang, Xing Yu Han
• Keywords: Drill Rod, Lateral Vibration, Natural Frequency, Vibration Mode

References

[1] X.Y. Pan, Z.H. Wang, FEM Analysis of Drill Pipe in Drilling Process, Coal Mine Machinery. 30(1) (2000) 92-94.

[2] X.M. Han, Z.X. Tie, D.S. Li, L.L. Zhang, Collision Behavior Mechanism between drill Pipe and Coal Hole Wall during Gas Extraction Drilling, 2nd International Symposium of Mine Safety Science and Engineering. Beijing, 2013. 09. 21-23.

DOI: 10.1201/b16606-224