Simulation study on the influence of different working conditions on the wear depth of coal and rock picks containing gangue

In order to study the influence of different working conditions on the wear depth of the pick cutting coal and rock containing gangue, a finite element model of the pick-gangue coupling is established to simulate the cutting process of the pick cutting coal and rock containing gangue, and to explore the correlation between the stress distribution, temperature distribution and the wear depth of the pick. Orthogonal test method is used to analyze the influence of rotating speed, traction speed and installation angle on the wear depth of pick. The results show that within the range of simulation test parameters, the stress distribution and temperature distribution of the pick affect the size of the wear depth of the pick, and the stress and temperature of the pick have a positive correlation with the wear depth of the pick. The stress, temperature and wear depth of pick of coal and rock containing gangue are greater than that of coal and rock without gangue. With the increase of the traction speed of the pick, the wear depth of the rake face of the pick tip increases. With the increase of the pick speed, the wear depth of the rake face of the pick tip decreases. With the increase of installation angle, the wear depth decreases first and then increases. The research results can effectively improve the cutting performance and efficiency of coal mining machines.