Coal mine drilling slag gas leading-out system

The invention discloses a coal mine drilling slag gas leading-out system, and relates to the field of coal mine equipment. The coal mine drilling slag gas leading-out system comprises a blowout prevention device, a slag gas separator, a slag gas pipe, a gas pipe, a drainage pump and a slag water pipe. The slag-gas separator comprises a separator shell, a rotating shaft, a three-way joint, a discharge joint and at least three blades; the separator shell is cylindrical and horizontally arranged, the rotating shaft and the separator shell are coaxially arranged and installed on the separator shell, the blades are circumferentially and evenly distributed with the rotating shaft as the center and connected with the rotating shaft, and the inner space of the separator shell is divided into a plurality of material containing cavities through the blades. The three-way connector is located above the separator shell and connected with the separator shell, the discharge connector is connected with the lower end of the s