Roof fracturing device for coal mining

The utility model provides a roof cracking device for coal mining. The roof cracking device comprises a cracking body and a fixing column. A placing groove is formed in the upper end surface of the fixed column; one end of the fracturing main body is arranged in the placing groove; an opening is formed in the lower end of the fixed column; a fixing assembly is arranged in the opening; the fixing assembly comprises a threaded rod with one end arranged in the opening and rotationally connected with the fixing column. The threaded rod is in threaded connection with a cross plate; the cross plate is in sliding connection with the fixed column through a sliding assembly; the cross plate is fixedly connected with a fixed block; the fixing block is hinged to a connecting plate through a hinge piece. The other end of the connecting plate is hinged to a pressing plate through a second hinge piece. A through groove communicated with the opening is formed in the fixed column; the pressing plate is arranged in the throug