- Industry: 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 ...
An appliance to determine the liquid limit of a soil. It consists of a brass dish, handle, and cam mounted on a hard rubber base. The dish falls through a distance of 1 cm per rotation. A sample of soil 1 cm thick is placed in the dish with a groove 11 mm wide at the top and 2 mm at the bottom. The number of jars required to cause the 2-mm gap to close along 1/2 in (12.7 mm) is recorded.
Industry:Mining
An appliance to eliminate much of the labor when drilling with handheld machines. It consists of a steel cylinder and air-operated piston, the rod of which extends through the top end of the cylinder and supports the drilling machine. The air leg and machine can be operated by one worker.
Industry:Mining
An appliance to eliminate much of the labor when drilling with handheld machines. It consists of a steel cylinder and air-operated piston, the rod of which extends through the top end of the cylinder and supports the drilling machine. The air leg and machine can be operated by one worker.
Industry:Mining
An appliance to prevent large pieces of tramp iron from entering a primary breaker when the ore feed is by conveyor. The appliance is straddled across the conveyor and when the tramp metal (magnetic or nonmagnetic) of dangerous size passes under the detector it automatically stops the conveyor and sounds an alarm, and will not restart motion until the tramp material is removed.
Industry:Mining
An appliance to provide a constant flow of coal from a continuous miner to the main haulage system. It consists of a conveyor slung under the tail end of the loader and running on a bogey straddling the heading conveyor so that it can telescope over it.
Industry:Mining
An appliance to provide a feed pressure and a support for the drilling machine usually in tunnels. Four main types of drill mountings are in use, namely, the post, the air leg, the drill frame, and the drill carriage.
Industry:Mining
An appliance to warm the air as it enters the downcast shaft or intake drift. In countries where the winter is very cold, nearly all mines are equipped with air heaters of the oilfired, gas-fired, or electric type.
Industry:Mining
An approx. horizontal passageway into a mine; an adit. Taken from the German term stollen.
Industry:Mining
