How to use core dirll bit

When the complex formations with pipe segmented dry core drill bit, core drill bits parameter selection should be based on a low-speed, low feed pressure, high wind speed on the return to the principle of operation of the construction process should hardness of rocks, loose formations depending on the extent of core drill bits , moisture and other factors control core drill bits speed, especially when core drill bits encountered large loose or fractured formations, in particular, to reduce the feed rate and feed pressure, repeated slag hole cleaning. In the specific construction operations should also pay attention to the following aspects:

⑴ should be checked before the next core drill bit hole DTH hammer, with the core drill bits pipe, casing and casing shoe is firmly connected to the eccentric core drill bits rotation is flexible, whether ventilation.

⑵ should be observed during core drill bits to follow up the case and the case sleeve pink hole row, every 0.3 to 0.4 meters core drill bits should be a strong blow hole ranked powder to keep the hole clean. When the blow hole, center core drill bits up Poppet distance should be strictly controlled in order to achieve a strong blow hole powder row limit, prohibit core drill bits process in a strong pull from the center of the Non-core drill bit.