Abstract: To address the coal blockage issue in the coal bunker, activation vibration coal feeders are installed at its bottom. Unfortunately, the effect is not very satisfactory. In this paper, the structure and principle of two kinds of activation vibration coal feeders are introduced. Calculation on related parameters shows that the enormous pressure from the coal particles in the coal bunker has great impacts on the coal feeder performance. Therefore, some measures to reduce the pressure of coal particles are proposed.

Key words: coal bunker bottom, activation vibration coal feeder, coal blockage