Coal caving mechanism of end support shield beam

The invention discloses a coal caving mechanism of an end support caving beam, and belongs to the technical field of end supports, the coal caving mechanism comprises a coal caving opening formed in the caving beam, the discharging side of the coal caving opening is provided with a plate inserting mechanism used for coal caving work, and the coal caving work has a puncturing station and a blanking station; the inserting plate mechanism is provided with a telescopic inserting plate matched with the coal discharging opening in width, net breaking teeth facing the metal net are arranged at the end of the telescopic inserting plate, a supporting part is arranged on the shield beam and located on the feeding side of the coal discharging opening, and the telescopic inserting plate stretching to the puncturing station can abut against the upper surface of the supporting part; a blanking area is formed between the end, stretching to the blanking station, of the telescopic inserting plate and the coal discharging port