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Modeling drill bit wear mechanisms during rock drilling

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Abstract

Drilling is a major component of mining operations and must be efficient in order to achieve an economic production cycle. The main objective of this research is to utilize numerical approaches in the prediction of bit wear rather than laborious, time-consuming, and expensive lab tests. This research used three-dimensional continuum modeling to study the effect of rock and drill bit material, drill speed, and feed rate on the interaction of rock and bit material. In addition, three-dimensional discontinuum modeling was used to validate the previous modeling and to investigate workpiece fragmentation. The rock types evaluated were quartz, limestone, and copper, and the bit materials tested were 76-mm tungsten-carbide (T-C) and polycrystalline diamond compact (PDC). The maximum bit wear depth was 64 mm which occurred with T-C bit and quartz as the workpiece. Tool wear depth was five times higher for copper (0.001 mm) than limestone for a given drilling time. In the discontinuum model, the effect of rotational speed and feed rate on rock fragmentation were simulated. The approach can be used for different purposes by varying the defined parameters in this paper.

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Correspondence to Ali Mortazavi.

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Houshmand, N., Mortazavi, A. & Hassani, F.P. Modeling drill bit wear mechanisms during rock drilling. Arab J Geosci 14, 1970 (2021). https://doi.org/10.1007/s12517-021-08333-3

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