- 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 short chain to attach tubs to an overrope in endless rope haulage by wrapping it around the rope. The chain may be about 12 ft (3.7 m) long, of low manganese steel, with 3/8- in-diameter (9.5-mm-diameter) standard links. At one end of the chain, a ring 4 in (10.2 mm) in diameter is attached to the drawbar hook of the tub, and to a hook about 3/8 in in diameter to secure it to the rope at the lashing end. On an undulating road, two lashing chains may be necessary--one forward and one rear of the tub.
Industry:Mining
A short conveyor designed to receive the coal from the face conveyors and elevate it to such a height as to be convenient for delivery into mine cars.
Industry:Mining
A short conveyor that feeds the coal from the face conveyor onto the gate conveyor.
Industry:Mining
A short conveyor which takes the coal from, and advances with, a face power loader or continuous miner. It delivers the coal onto a gate conveyor over which it runs on a bogey.
Industry:Mining
A short core barrel used to begin coring operations when the distance between the drill chuck and the bottom of the hole, or to the rock surface in which a borehole is to be collared, is too short to permit use of a full 1.5-m-long or 3-m-long core barrel.
Industry:Mining
A short curved section of a shaker conveyor trough inserted in a trough line to change the angle of direction. Up to 15 degrees of turn, the angle trough does not employ any 130 means of support other than connection to adjacent troughs. For a greater degree of turn, a fulcrum jack and a swivel device are employed with the trough section.
Industry:Mining
A short endless chain on which dogs or teeth are spaced to mesh with and move or be moved by a conveyor chain.
Industry:Mining
A short glass jar fitted with an airtight cover and containing some desiccating substance (as calcium chloride), above which is placed the material to be dried or to be protected from moisture.
Industry:Mining
A short haul in which there is no secondary or mainline haulage; e.g., a mine is started into a hillside, using mine cars, track, and hand loaders. An empty car is placed for the loader, and the loaded car is taken to the dump manually or by machine, repeating the process for each loader.
Industry:Mining
