Research and Application of the Testing Technology for Impacting Screw Drilling Tools in Coal Mine Roadways

Zhifeng Wu

doi:10.6911/WSRJ.202509_11(9).0004

Authors

Zhifeng Wu

DOI:

https://doi.org/10.6911/WSRJ.202509_11(9).0004

Keywords:

Coal mine; impact screw drilling tool; dynamic testing; hard rock breaking; directional drilling.

Abstract

With the popularization and application of underground directional drilling technology in hard rock strata of coal mines, the performance test of impact screw drilling tools is of key significance for the optimization of drilling tools. Based on the working principle of the cam impact hammer-spring energy storage impact mechanism, this paper designs a test platform including a mechanical loading system, a hydraulic circulation system, and a high-speed data acquisition system, realizing the synchronous collection of parameters such as torque (1480 N·m), impact force (5-9 kN), and rotational speed. Field applications show that this testing technology can guide the service life of drilling tools to increase by more than 2 times, providing data support for the optimization of hard rock directional drilling technology.

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