DOI: 10.11799/ce202601029
Development and application of a detachable active drill pipe for underground automatic drills in coal mines
JIANG Wei
ZHANG Mingchen
SHI Shuhan
WANG Qingfeng
YAN Baoyong
WAN Yuan
Abstract：To address technical issues associated with traditional integral active drill rods,such as complex assembly and disassembly,low replacement efficiency,the need for complete replacement due to wear,and high replacement costs,a detachable active drill rod was developed.By thoroughly analyzing the fundamental requirements of the drill rod,a technical solution based on a split structural design was proposed,along with a method for determining the optimal filling amount of thread-locking adhesive.Through simulation and numerical analysis of thread-locking adhesive failure parameters,the relationships among applied torque,maximum contact pressure,and maximum contact torque were investigated,leading to the determination of the applied torque value at which the thread-locking adhesive fails.This provides data reference for reducing experimental testing frequency and lowering experimental costs.Finally,laboratory testing,field drilling trials,and underground mine experiments were conducted.Results of the underground trials demonstrate that the active drill rod operates continuously and stably during drilling,with no unsafe occurrences such as thread disengagement,jamming,deformation,or fracture.It meets the requirements for applicability,safety,strength,and stability in underground applications.Worn components can be individually replaced without the need for complete rod replacement,facilitating convenient and efficient assembly/disassembly and significantly reducing replacement time and costs.
Keywords：underground coal mineautomatic drilling rigactive drill rodthread-locking adhesivesplit structure
Publication Date：2026-01-20
Online Publishing Date：2026-03-10(First online date of this platform, not the publication date of the document)
Pages：8( 233-240 )