• Tunnel and Underground Space
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• v.34 no.5
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• pp.554-570
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• 2024

In this study, a field test was conducted to determine the effect of reinforcement around the insert on the wear damage of the pickcutter. Prior to the field test, a linear cutting test was conducted on the reinforced pickcutter and unreinforced pickcutter to determine the effect of the pickcutter reinforcement on the cutter force, and the capacity of the roadheader was checked based on the results. The cutter force analysis showed that the average normal force and cutting force were similar regardless of the reinforcement, but the maximum normal force and cutting force showed a large standard deviation depending on the reinforcement. From the torque review, it was determined that a depth of penetration of 6 mm or less using the average cutting force and 4 mm or less using the maximum cutting force was appropriate. In the wear damage analysis, the number of used pickcutters, the number of pickcutters with inserts retained, the number of cases of uneven wear, and the difference in weight between before and after use showed that the reinforced pickcutters outperformed the unreinforced pickers by 16% to 28%. From these results, we can conclude that pickcutter reinforcement has a significant impact on the durability of the pickcutter. However, the cost of reinforcing pickcutters is higher than that of unreinforced pickcutters due to material costs and additional processes, so it is necessary to consider the effect of performance improvement and cost.