(1) Before entering the rod, adjust the appropriate impact pressure, propulsion pressure, rotation speed and buffer pressure according to different geological strata, and debug the pressure values to match the geological strata and rock hardness between the pressure values.
(2) When drilling, make the drilling tool group concentric to avoid bending deformation of the drill tail, drill rod and drill head.
(3) Avoid empty hitting, stop drilling immediately when empty hitting occurs, and avoid causing excessive damage to drilling tools.
(4) After drilling the drill rod, each drill rod withdrawn should be coated with cooling lubricating oil in the thread end and quick joint of the drill rod-after the drilling operation is completed, the thread connection of the drill rod is high temperature and there are some gravel blocks and mineral water, and the coating of cooling oil plays the role of lubrication, cooling, corrosion prevention and improvement of thread wear resistance.
(5) In the process of rod withdrawal, try to avoid repeated rod vibration (this operation is one of the reasons for the biggest damage to the drill rod). When the thread connection of the drill rod is difficult to loosen, inject lubricating oil into the thread at the first time, and then withdraw the rod or loosen the vibrating rod, so as to reduce the direct damage to the thread of the drill rod during the vibrating rod-when the rod is vibrating rod, the rock drill will transmit an impact pressure of nearly 200bar. Under the continuous action of high-frequency impact pressure, stress concentration will be caused. Repeated vibration will lead to high temperature and high heat, which will cause cold solder joint burning at the threaded end of the drill rod, I .e. ablation pit, and even form a melting pit at the melting temperature of the metal, thus forming a fatigue source and causing early failure of the drill rod.
