Geomechanics and Engineering

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Complex analysis of rock cutting with consideration of rock-tool interaction using distinct element method (DEM)

  • Received : 2019.10.28
  • Accepted : 2020.02.07
  • Published : 2020.03.10
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Abstract

Cutting of rocks is very common encountered in tunneling and mining during underground excavations. A deep understanding of rock-tool interaction can promote industrial applications significantly. In this paper, a distinct element method based approach, PFC3D, is adopted to simulate the rock cutting under different operation conditions (cutting velocity, depth of cut and rake angle) and with various tool geometries (tip angle, tip wear and tip shape). Simulation results showed that the cutting force and accumulated number of cracks increase with increasing cutting velocity, cut depth, tip angle and pick abrasion. The number of cracks and cutting force decrease with increasing negative rake angle and increase with increasing positive rake angle. The numerical approach can offer a better insight into the rock-tool interaction during the rock cutting process. The proposed numerical method can be used to assess the rock cuttability, to estimate the cutting performance, and to design the cutter head.

Keywords

Acknowledgement

Supported by : National Nature Science Foundation of China, Natural Science Foundation of Guangdong, Central Universities, Chinese Scholarship Council (CSC)

This work was supported by the National Nature Science Foundation of China (51904359), Natural Science Foundation of Guangdong (2020A151501528) and the Fundamental Research Funds for the Central Universities (19lgzd41). The first author would like to thank the Chinese Scholarship Council (CSC) (201408080085) for its financial support. Special thanks to Mr. Qiaofeng Ni and Mr. Mingzhi Zheng at TU Bergakademie Freiberg in constructing the cutting tools.

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