1. When working, the workers' labor protection equipment must be worn in full specifications.

　　2. Perform a comprehensive inspection of all parts of the DTH hammer before the operation.

　　3. Add enough lubricating oil and grease to each lubricating part.

　　4. When the power is turned on, the voltage variation range should not exceed -5～+10% of the rated value; the air pipe is connected, and the air pressure reaches 5～6 kg/cm; there is no pipeline leakage.

　　5. When drilling holes, the top surface should be flat. When working on sloping ground, wedge blocks should be used to plug the track shoe. Horizontal operations on slopes are prohibited.

　　6. When someone is working at the orifice, it is forbidden to supply air to the impactor. When disassembling the drill bit, close the revolving and lifting mechanism to prevent injury.

　　7. The cleaning, oiling, and repair work of the rotating parts must be carried out in a stopped state.

　　8. Frequently check whether the air pipe joints are tight to prevent disconnection and injury. The overhaul of the air supply system must be carried out after the wind has stopped.

　　9. When landing or landing the skid, it is not allowed to stay or pass under the skid.

　　10. According to the hole design requirements, the carriage azimuth angle is correct, and the machine body is stable and reliable.