부산대학교 도서관

To optimize the design of the pick arrangement and improve the force state of picks, a finite element model of double pick cutting rock is established by defining the mechanical properties of rock with Holmquist-Johnson-Cook model. The ANSYS/LS-DYNA software is used to analyse the changes in the pick force and rock stress distribution under different cutting depths and spacing between picks when adjacent double picks are used to cut the rock. The results show that the mean cutting force is proportional to the cutting depth when cutting the rock with a single pick. With the increase in the spacing between picks, the mean cutting force of pick 2 increases first and then remains unchanged, and the rate of increase gradually becomes larger with the increase in the cutting depth of pick 2. The mean lateral force of pick 2 increases first and then decreases. Selecting suitable spacing between the picks and cutting depth plays an important role in improving the force state of the picks. This research provides a reference for the optimal design of pick arrangement on the cutting head of roadheaders. [ABSTRACT FROM AUTHOR]