Abstract. Based on the analysis of the present situation of the research on the cutting process of the drum, the research method of the equipment capable of obtaining the cutting force in the drum cutting process is proposed by combining the finite element explicit dynamic analysis. Aiming at the complicated force of the shearer's pick cutter in cutting the coal rock. In this paper, the finite element software is used to explicit dynamics simulate the picking of coal mining in the cutting process, and the strain distribution on the cutting is determined. Based on this, the use of strain gauge bridge design ideas to indirectly obtain the force on the cutter, and finally get the relevant experimental data. Compared with the finite element simulation analysis, the feasibility of the two schemes is explained, and the foundation of the follow-up experiment is laid.
Based on the study of cutting theory of shearer pick-shaped cutter used in thin seams, cutting tests under different fault conditions were done by using pick on the Cutting Test Bed of the Coal and Rock. The results show that: picking Cutting Torque in the coal seam and small fault interface increases with the increase compressive strength difference between the coal seam and small fault. Meanwhile, the mean increments of the cutting torque did not change exponentially, when the thickness of full fault is twice the thickness of top fault or bottom fault in the cutting tests. Through time-domain analysis and frequency-domain analysis of cutting load, it can be seen that probability density curves of pick torque obeys normal distribution in cutting coal seams and small fault. The drum speed affects load fluctuations a lot different forms of coal and rock has some impact on the load fluctuation.
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