Analysis on the influence law of traction speed on the cutting performance of coal containing hard concretion

Due to the great differences in mechanical properties between hard concretion and coal, shearer drum cutting coal rock containing will inevitably lead a series of problems, such as severe load impact, increased specific energy consumption low loading efficiency. Taking part thin seam service target mining area prototype, models rocker arm are established by using UG, discrete element model wall with concretions is built importing it into EDEM. The influence law traction speed on rate, analyzed, corresponding fitting relationship function obtained. design variable, load, rate comprehensive indicators, multi-objective optimization established. optimal solution obtained NSGA II algorithm, accuracy simulation verified experiments. This method has certain engineering significance for reasonable selection speed.