The wing of the DTH Hammer bit is broken; the new bit is larger than the original diameter; the machine is displaced or the drilling tool is deflected in the hole during rock drilling; rocks fall from the hole wall or hole or encounter large cracks or caves during rock drilling; Dust is not easy to discharge in areas with mud and rocks; negligence in operation, when drilling is stopped for a long time, the rock dust is not blown off, and the drilling tool is not lifted, so that the impactor is buried by the rock dust; Treatment method: As far as the strength of the drill bit is concerned, broken wings have been basically eliminated. In case of special circumstances, a seamless pipe with a diameter similar to the hole diameter can be used. The pipe is filled with butter, asphalt, etc., connected with the drill pipe to enter the bottom of the hole. , Take out the broken wing at the bottom of the hole, and blow off the rock dust at the bottom of the hole before salvaging. In more serious cases, the drill tool cannot be lifted, put down, and the impactor does not sound. At this time, only the torque or auxiliary tools can be used to help the drill tool to rotate, and then the drill tool must be lifted while air is supplied until it fails. Until it is lifted. When DTH Bit is re-drilling, first apply a little pressure and then gradually increase the propulsion force until it reaches the normal working pressure.