- 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 ...
In coal and metal mining, supporting the roof by pillars left at regular intervals.
Industry:Mining
In coal and coke sampling, the process whereby an analysis sample is obtained from a sample by particle size reduction, mixing and sample dividing in successive stages. A stage of sample preparation refers to the sequence of operation leading up to a sample division.
Industry:Mining
In coal mine ventilation, the horsepower applied is often known as the power upon the air. This may be the power exerted by a motive column due to the natural causes, to a furnace, or it may be the power of a mechanical motor. The power upon the air is always measured in foot pounds per minute.
Industry:Mining
In flotation, this refers to deliberate use of insufficient reagent in the early part of the treatment to increase selectivity of conditioning, followed by further addition at a later point in the process.
Industry:Mining
In coal mining, a charge placed so that the face or burden is nearly parallel with the borehole.
Industry:Mining
In explosives, the distance that detonation advances before the products of combustion expand by an appreciable percentage.
Industry:Mining
In coal mining, a fan that sucks used air from a mine and thereby causes fresh air to enter by separate entries to repeat the cycle.
Industry:Mining
In fan shooting, a time-distance curve obtained along a profile in some nearby area that does not contain geologic structures of the type being sought.
Industry:Mining
In coal mining, a foreperson who supervises the loading and drawing of coal into and out of chutes, esp. where coal is mined from inclined beds.
Industry:Mining
In coal mining, a mine in which all development work has reached the boundaries and further extraction will be done on the retreat.
Industry:Mining
