Current Hydraulic Drilling Performances
The advantages and disadvantages of hydraulic over pneumatic systems in drilling are considered. User experience shows a reduction of maintenance cost and of ancillary expenses when changing from pneumatic to hydraulic rock drills, combined with a rise in productivity. Difficulties have been encountered, for example by inadequate water supply, which creates a risk of drill steels getting stuck in the hole when drilling fast. Drilling bit difficulties disappear when the hydraulic rock drill is well adapted to the rock conditions.
R. L. Bullock, "Current Hydraulic Drilling Performances," Ind. Miner. (St. Etienne), Mineralurgie, Jan 1978.
Mining and Nuclear Engineering
Article - Journal