Start up: click the start-up signal, contact with the drivers of each belt conveyor, and make sure that the belt conveyor of the transportation system is in the allowed start-up state. Press the start button, PLC controller will start early warning, start 1 × belt conveyor 10 seconds later, and then start one belt conveyor every 6 seconds in the direction of reverse coal flow until 5 × belt conveyor is started (refer to "single belt conveyor operation" for the start and operation of 5 × belt conveyor).