Stationary Boom Systems is a stationary unit, mounted over the grizzly, operated electrically to break and rake oversized boulders or lumps of coal dumped on the grizzly. It ensures that the crushers are fed with the appropriate size of the feed. These rock breaker systems prevent the unnecessary stopping of the crusher owing to the jamming of large boulders and lumps of coal in both underground and open pit mines , coal handling plants and offer high quality, high productivity and immense robustness.