- 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 electric blasting cap that explodes one-fiftieth to one-half second after passage of an electric current.
Industry:Mining
An electric blasting cap that explodes one-fiftieth to one-half second after passage of an electric current.
Industry:Mining
An electric blasting cap with a delay element between the priming and detonating composition to permit firing of explosive charges in sequence with but one application of the electric current. It detonates about 1 to 2 s after the electric current has passed through the bridge. It is made in two kinds, first and second delay, and is used in connection with regular, waterproof, or submarine electric blasting caps for blasting in tunnels, shafts, etc., where it is desirable to have charges fired in succession without the necessity of the blaster returning betweeen shots.
Industry:Mining
An electric cable designed for use in mine roadways. It may be either rubber insulated, sheathed, and armored or paper insulated.
Industry:Mining
An electric centrifugal pump consisting of a small vertical centrifugal pump so designed that it will draw water if it is only 2 to 3 in (5.1 to 7.6 cm) deep. It is placed in the water at the bottom of a shaft and lifts the water up to a horizontal centrifugal pump placed about 50 ft (15.2 m) above.
Industry:Mining
An electric current of recommended magnitude and duration to sufficiently energize an electric detonator or a circuit of electric detonators.
Industry:Mining
An electric detonator with a designated delay period of 25 to 1,000 ms.
Industry:Mining
An electric engine, operating either from current supplied from trolley and track or from storage batteries carried on the locomotive. The locomotive may be powered by battery, diesel, compressed air, trolley, or some combination such as battery-trolley or trolleycable reel. Used to move empty and loaded mine cars in and out of the mine.
Industry:Mining
An electric fan used for the removal of enamel dust from the spray booth, or fumes from the pickle room, thus safeguarding the health of the worker.
Industry:Mining
An electric hoist that hangs from a power-driven wheeled cab rolling on an overhead rail; it is often referred to as a monorail.
Industry:Mining
