Optimisation Analysis of Cut-Off Teeth of Mining Cantilever Coal Miner
Aiming at the problems of high wear and low service life of cut-off teeth in the process of coal rock cutting of cantilever type roadheader,according to the theory of coal rock pre-cracking and joint cutting and breaking of coal,a new cut-off tooth integrating impact and cutting is proposed,and the process of hydraulic impact and joint breaking of coal by the cut-off tooth is studied by using the programme of discrete element simulation and analysis.According to the practical application,it is shown that after adding impact cut-off teeth on the cutting drum of coal mining machine,the service life of the cut-off teeth can be improved by 77.9％,and the cutting efficiency of coal mining machine can be improved by 14.1％.
coal mining machineimpact cutterdiscrete element analysisjoint coal breaking
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