DTH drilling rigs can drill holes in medium or above medium hard (f≥8) rock. It is the same as the rock drill, there is impact, rotation, slag discharge and propulsion of the rock drilling hole-forming process, the difference is that the impact mechanism of the DTH drilling rig---- the impactor is installed at the front end of the drill pipe, submerged into the bottom of the hole, and continues to advance with the extension of the borehole. DTH drilling rigs get their name from the impact of the hole that submerges.

Schematic diagram of DTH drilling rig operation

 DTH drilling rigs are not like rock drill joint drilling, energy loss increases with the lengthening of the rod, so deep holes and large holes can be punched; When applied to open-pit drilling, compared with the steel rope impact drilling rig, the drilling speed is increased by 2~3 times, the degree of mechanization is higher, the auxiliary operation time is less, and the drilling rig operation rate is improved; DTH drilling rig is light in weight, flexible in maneuver, low in investment cost, especially can drill oblique holes, which is conducive to controlling ore grade, increasing the stability of slope, eliminating the root, and improving the blasting quality.

    Features of DTH drilling rigs: energy loss does not increase with the lengthening of the rod; The noise of the working face is greatly reduced; The degree of mechanization is high, the auxiliary operation time is less, and the drilling rig operation rate is improved.





Chigo excavates the Central China Service Center