Fixed divergent coal mine excavation gangue underground crushing and filling process

The invention relates to the technical field of underground gangue large-scale disposal, in particular to a fixed divergent coal mine excavation gangue underground crushing and filling process which comprises the following steps that gangue is conveyed to a tunneling alley entrance; the discharged gangue enters a four-stage transfer belt after being dewatered in a dewatering screen of the gangue underground filling station; the gangue enters a buffer storage bin through a fourth-stage belt, a belt feeder is installed below the buffer storage bin, and the gangue is quantitatively and stably conveyed to a crusher; grinding after crushing; gangue ground by the wet ball mill flows into an underground slurry storage tank in a gangue slurry form, and filling and grouting are completed by using a mining filling pump. The gangue slurry is good in diffusivity, and the requirement for a filling site is low; a filling system in the whole filling process is directly arranged in the existing underground conventional roadw