Drilling, pouring and hole sealing device for reinforcing coal seam floor

The utility model discloses a coal seam floor reinforcing, drilling, pouring and hole sealing device which comprises a fixing cylinder, an extrusion cylinder, a piston mechanism and a plugging assembly. The top surface of the fixed cylinder is fixedly connected with the bottom surface of the extrusion cylinder; an inner cavity of the fixed cylinder and an inner cavity of the extrusion cylinder are coaxial and communicated; multiple layers of extrusion holes are formed in the side top end of the extrusion cylinder; mounting holes are formed in the bottom end of the side of the extrusion cylinder; the plugging assembly sleeves the bottom end of the side surface of the extrusion cylinder and is communicated with the mounting hole; the outer diameter of the extrusion cylinder is smaller than that of the fixed cylinder; multiple inclined holes are formed in the side face of the fixing cylinder. The piston mechanism comprises a piston assembly and a barb assembly; the piston assembly is slidably connected with an i