- المجال: 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 machine to remove gob from railroad tracks, between rails, and to a distance of 48 in (1.2 m) from the track centers. Digger plates remove gob to the top of ties, while wings on either side of the machine gather it from the sides of the track into the track, to be moved by conveyors to a car at the machine's rear. One person operates the towing motor and observes the digging, while another controls the digging plate height, adjusts wing plows, and observes loading.
Industry:Mining
A machine tool in a steel-fabrication shop used to strip the flanges from the ends of rolled steel joists.
Industry:Mining
A machine used for applying test loads to standard test pieces or to structural members. Machines are available for carrying out tensile, compressive, impact, and fatigue tests.
Industry:Mining
A machine used for mixing auriferous clays with water to the proper consistency for the separation of the ore.
Industry:Mining
A machine used for undercutting coal in which the main frame and carriage are held stationary by roof jacks while the cutter frame advances into the kerf during the cutting operation. Since cuts do not exceed 44 in (1.1 m) along the face, it is necessary to relocate the machine several times before the entire face can be cut.
Industry:Mining
A machine used in quarrying for cutting an artificial seam in a mass of stone. It is made in several forms, the principal types being the bar channeler (in which the cutters are mounted on a carriage that works along a heavy bar or bars) and the track channeler.
Industry:Mining
A machine with a rotating jib head so that vertical or shearing cuts can be made in addition to the arc wall cut. An arcwall machine will cut a 12-ft (3.7-m) heading to a depth of 6 ft (1.8 m) in 10 min.
Industry:Mining
A machine with downward projecting teeth for breaking hard soil at quarries and opencast pits. It may be self-propelled or attached to another vehicle.
Industry:Mining
