Analysis on Stability of Pressure-Bearing Drill Rod in VerticalSlotted Hole Drilling
Abstract：The upward raise boring machine was researched and developed by Mine Construction Branch of China Coal Research Institute,was a first domestic electric controlled upward raise boring machine with the independent intellectual property rights and could be applied to the vertical upward or inclined upward boring engineering in the metal mine,transportation engineering and other areas.The paper had an introduction on the working principle of the upward raise boring machine and the stressed condition of the drill rod during the vertical slotted hole drilling.The drill rod stressed model was simplified.The energy method was applied to derive the expression formula of the critical force occurred when the drill rod was stressed and twisted.The calculation example was applied to explain the critical force of the drill rod affected by the spacing of the stabilizers and the drill rod torque.
Keywords：vertical slotupward raise boring machinestability of drill rodenergy methodtorque
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 24-27 )