- 업종: Mining
- Number of terms: 33118
- Number of blossaries: 0
- Company Profile:
The U.S. Bureau of Mines (USBM) was the primary United States Government agency conducting scientific research and disseminating information on the extraction, processing, use, and conservation of mineral resources.
Founded on May 16, 1910, through the Organic Act (Public Law 179), USBM's missions ...
A drill rig designed specif. and used only for surface drilling operations.
Industry:Mining
A drill rig utilizing the jet action of a high-pressure stream of water to produce a borehole in soft or unconsolidated material.
Industry:Mining
A drill rod made of brass, aluminum, or other metal unaffected by magnetism.
Industry:Mining
A drill rod with continuous helical fluting, which acts as a screw conveyor to remove cuttings produced by an auger drill head.
Industry:Mining
A drill rod with continuous helical fluting, which acts as a screw conveyor to remove cuttings produced by an auger drill head.
Industry:Mining
A drill support consisting of a cylinder of about 2-in (5.1-cm) bore in which the piston is actuated by compressed air controlled by a twist-grip control valve. This valve is also used to release the air pressure to allow the piston to be lowered. The control valve also regulates the feeding pressure on the drill. The length of feed of the Holman Airleg is 39 in (99 cm), overall length 57 in (145 cm), and weight 25 lb (11.4 kg). A vent hole near the top of the cylinder allows the air to escape when the piston travels past it, so as to warn the operator that the limit of feed has been reached. The leg is then readjusted for drilling to be resumed. The leg gives good support to the drill at all heights within reasonable limits, and one person can comfortably handle a drill when mounted in this way.
Industry:Mining
A drill unit mounted on wheels or crawl-type tracks to facilitate moving.
Industry:Mining
A drill, usually with one or more flutes and with coolant passages through the drill body, used for deep-hole drilling.
Industry:Mining