Research on drum load characteristics in oblique cutting process of shearer with coal containing parting

In order to study the load characteristics of the shearer’s spiral drum cutting the coal seam containing under the condition of the bevel cutting，the Pro/e is used to establish the coal wall space model and introduce it into the discrete element software EDEM.The particle filling is measured by the coal sample parameters measured from the 17-layer coal rock of Yangcun Coal Mine of Yankuang dustry Group， and the discrete element simulation model of drum cutting is founded.Through preliminary experiments， it is decided to adopt a method of segmenting the coal wall to reduce the simulation time.The results show that during the oblique cutting process joint force of the drum gradually increases， and the force under the clamping condition is significantly greater than that under the full coal condition， which is about 4 times of the force under the full coal condition.The traction resistance and cutting resistance of the drum gradually increase，and the traction resistance is about twice the cutting resistance； the axial force increases first and then decreases.When the drum starts to contact with the coal wall， it is a single-tooth force， and the maximum value can reach up to 15 000 N.The feasibility and accuracy of using the segmented EDEM simulation model were verified， and 90% of simulation time was saved， which provided a reference for the study of the oblique cutting process of the shearer drum.