Abstract
The poor loading performance of shearer drums restricts the development and production efficiency of coal in thin coal seams. Changing operation and structural parameters can improve the drum’s loading performance to some extent, but the effect is not obvious. A two-segment differential rotational speed drum (TDRSD) was proposed after analyzing the drum’s influence mechanism on coal particles. To further reveal the drum’s coal loading principle, the velocity, particles distribution, and loading rate were analyzed. The effect of the matching relationship of the rotational speed and helix angle between the front and rear drum are also discussed. The results show that a lower front drum rotational speed had a positive impact on improving the loading performance, and the loading rate first increases and then decreases with the increase in rear drum rotational speed. The optimal loading performance was obtained in the range 60–67.5 rpm. The front drum’s helix angle had no evident effect on loading performance, and the loading rate increase with the increase in the rear drum’s helix angle. The results provide a reference and guidance for operation parameters selection, structure design, and drum optimization.
Highlights
IntroductionGlobally relevant energy source to support industrial production and development and mining it safely and efficiently has been studied extensively [1,2]
The rotational speed of the front and rear drums were represented by nF and nR, respectively
To improve the accuracy of the simulation and the reliability of the results, the particle shape used in discrete-element method (DEM) was calibrated in a laboratory via packing tests
Summary
Globally relevant energy source to support industrial production and development and mining it safely and efficiently has been studied extensively [1,2]. With the continuous mining of coal resources, the reserves of thick and extremely thick coal seams that are easy-to-mine have been drastically reduced. Thin coal seams with a wide range of distribution and rich reserves have become the focus of coal energy development. Due to the influence of the mining height and geometry structure of equipment in thin coal seams, the coal shearer’s loading performance is extremely poor, causing float coal and the need to be cleaned manually by workers, which harms production efficiency and affects workers’ safety directly.
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
