Conical pick cutting experiment and resistance spectrum characteristics

Aimed at a better evaluation of the performance of pick cutting, this paper, based on the experimental curve from the pick-shaped cutting resistance, introduces the application of the method of power spectrum to an qualitatively analysis of the chaotic characteristics, as when the shear is in the state of cutting, presents the relationship between chaos fractal dimension calculated from the sequence of cutting resistance and the yardstick of box dimension and introduces the use of MATLAB to the quantitative calculation of the box dimensions of the cutting resistance's time-series corresponding with the different installation angles of the cutting picks. The result shows that the cutting picks installed at 45-degree angle give the box dimension. The box dimensions and empirical mode decomposition, as described in the paper provide a new method for the theoretical research and design of drum shearers.