Abstract
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.
Highlights
The shearer is one of the key pieces of equipment in the integrated manufacturing system of ‘‘three machines’’ in fully mechanized mining
The ‘‘three machines’’ of a fully mechanized mining face cooperate with each other; the shearer undertakes the task of coal breaking, and the scraper conveyor and hydraulic support undertake the tasks of coal transportation and support, The associate editor coordinating the review of this article and approving it for publication was Chi-Tsun Cheng
The simulation validation test is carried out, and the results show that the coal mining rate is 80.71% and that the cutting specific energy consumption is 585.64 w · h/m3
Summary
The shearer is one of the key pieces of equipment in the integrated manufacturing system of ‘‘three machines’’ in fully mechanized mining. This paper studies the main factors affecting the coal mining rate and cutting specific energy consumption: drum speed, drum hub diameter and pick elevation angle. The drum speed after rounding is 74.1 r/min, the hub diameter after rounding is 321.8 mm, and the pick lift angle after rounding is 22.3◦ Under these conditions, the simulation validation test is carried out, and the results show that the coal mining rate is 80.71% and that the cutting specific energy consumption is 585.64 w · h/m3
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