Brake open position (X10) logic and internal position M5 (upper limit of scoop bar) trigger internal position M104: internal position M104 triggers Y4 (K6, pull 1 scoop bar), y6 (K8, pull 2 scoop bars), and two sets of transmission systems start to increase transmission power. Pull the scoop bar until it is high. Input X4 (1 × 3; corresponding internal position M32), X6 (2 × 3; corresponding internal position M34) at high position to trigger internal positions M32 and M34: when the spoon bar is pulled to high position, stop the output of pulling spoon (Y4 and y6); trigger internal position M106; M106 trigger output position Y10 (K10, interlock coal feeder), allowing the coal feeder to operate and load. The start-up process ends.