Analysis and Research on Working Performance of Shearer Based on Discrete Element Method
In view of the complex nonlinear relationship between the shearer mining rate and the cutting specific energy consumption in a fully mechanized mining face, the optimal combination of shearer motion parameters and geometric parameters is studied to achieve green mining by improving the coal mining rate and reducing the cutting specific energy consumption. The orthogonal virtual test of the shearer’s working performance is carried out using the discrete element software EDEM. The evaluation indexes of the shearer’s working performance are the coal mining rate and the cutting specific energy consumption. The results of the research based on the discrete element method are analyzed by the regression method. The regression equation of the evaluation indexes is calculated by SPSS software, and the three-dimensional contour map is drawn by MATLAB. The influence rule of the research factors on the evaluation index is determined. By optimizing the evaluation index, the optimal combination of parameters after shearer rounding is obtained: the drum speed is 74.1 r/min, the hub diameter is 321.8 mm, and the pick angle is 22.3°. The coal mining rate is 80.71%, and the cutting specific energy consumption is 585.64 w · h/m 3 . The simulation results are verified by experiments, which demonstrate the accuracy and feasibility of using the discrete element method to study the energy consumption of the shearer’s mining rate and cutting ratio.
Keywords: Coal, Coal mining, Mathematical model, Energy consumption, Finite element analysis, Force, Blades