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Simulation and experimental research on drilling and rock breaking mechanisms of anchor drill rigs with analysis of drilling feedback signals

Year: 2025
Type: article
Abstract: : This study addresses the challenges in coal mine excavation and aims to accelerate the development of rapid tunneling by improving the efficiency of tunnel support systems. Focusing on the drilling and rock-breaking mechanisms involved in anchor hole drilling, the study establishes a functional relationship between drill bit cutting forces and the energy required to fracture rock volumes. Drilling simulations were conducted using Abaqus finite element software, considering various lithologies and drilling parameters. The relationship between drilling feedback signals under different conditions was analyzed. To validate the theoretical and simulation results, a custom-built drilling experiment platform capable of real-time parameter collection was developed. Experiments were performed on artificial rocks of varying strengths, with displacement, rotation speed, thrust, and torque recorded as feedback parameters. These experimental results were then compared with theoretical predictions and numerical simulations. The study found a negative correlation between rock strength and both the average drilling speed and bit rotation speed, while thrust and torque exhibited positive correlations with rock strength. The consistency of the results across theoretical, numerical, and experimental approaches supports the conclusion that drilling feedback signals can reliably indicate changes in the surrounding rock structure. These insights enable real-time decisions regarding support schemes, thereby enhancing support efficiency and contributing key technological developments toward rapid tunnel development.
DOI: 10.1038/s41598-025-99329-6
Language: English
Open Access status: gold
Estimated APC paid: $2,690
Award: G112596839
OpenAlex ID: W4409805063
FWCI: 0.969
Cites: 23
Cited by: 3
Related to: 10