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Published on: January 20, 2023
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A study on pick cutting properties with full-scale rotary cutting experiments and numerical simulations
Qianqian Zhang1, Qiuxia Fan1, Hongbin Gao1
1School of Automation and Software Engineering, Shanxi University, Taiyuan, P.R. China.
Plos One
|April 14, 2022
Summary
Optimizing cut spacing in road-header picks enhances rock breaking efficiency. This study found the ideal cut spacing to cutting depth ratio for sandstone is 3:4, validated by simulations.
Area of Science:
- Mining Engineering
- Rock Mechanics
Background:
- Road-header picks are crucial for rock excavation.
- Understanding cutting forces is vital for optimizing performance and preventing tool wear.
Purpose of the Study:
- To optimize cut spacing for road-header picks.
- To validate numerical simulation results against experimental data.
Main Methods:
- Full-scale single-pick rotary cutting tests on sandstone.
- Analysis of specific energy, coarseness index, and cutting forces.
- Numerical simulation using PFC3D software, calibrated with material property tests.
Main Results:
- The optimal ratio of cut spacing to cutting depth for sandstone was determined to be between 3 and 4.
- Higher coarseness index correlated with increased block ratio.
- Specific energy decreased under optimized cutting conditions.
Conclusions:
- Numerical simulations using PFC3D provide reliable predictions of pick forces.
- Optimized cutting parameters, specifically cut spacing, significantly influence the rock-breaking effect.
- The findings aid in improving road-header efficiency and operational strategies.
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