Simulation study on the influence of different motion parameters on the performance of pick cutting coal rock containing gangue
China has rich resources of thin coal seams,but they are difficult to mine due to the presence of gangue rocks.The load fluctuation is severe when the pick cuts the coal rock containing gangue.The existence of gangue not only increases the difficulty of coal mining,but also greatly affects the cutting performance of the pick.In order to study the cutting performance of pick cutting coal rock containing gangue,the three-dimensional model of pick is constructed by Pro/E,and the finite element software ABAQUS is used to determine the simulated coal rock containing gangue,and the finite element coupling model of pick cutting coal rock containing gangue is established.The dynamic process of coal seam crushing is analyzed,and the cutting performance of picks under different motion parameters is studied.The single factor research method is used to study the influence of different traction speeds and different rotate speeds of the roller on the mean value of pick cutting force,the mean value of cutting force peak,coal falling mass per unit time,load fluctuation coefficient and specific energy consumption.The results show that with the increase of traction speeds,the mean value of cutting force,the mean value of cutting force peak and the coal falling mass per unit time increase,the specific energy consumption decreases,and the load fluctuation coefficient is basically unchanged.With the increase of rotate speeds of the roller,the mean value of pick cutting force,the mean value of cutting force peak and the coal falling mass per unit time decrease,the specific energy consumption increases,and the load fluctuation coefficient is basically unchanged.This study lays a foundation for improving the cutting and crushing performance of shearer under complex conditions and developing a strong drum for cutting complex coal seams.
pickcoal rock containing ganguetraction speedrotate speed of the rollercutting performance
NETL
NSTL
万方数据
