- 行业: 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 ...
The quality, state, or property of being granular; specif. one of the component factors of the texture of a crystalline rock, including both grain size and grain-size distribution.
Industry:Mining
The quantity of air required by law or practical considerations to maintain adequate ventilation of a mine. This quantity will depend on (1) the length of face room in production, (2) the average distance from the shafts to the faces, (3) the gas emission rate, (4) the depth of the workings, and (5) the volumetric efficiency of the mine ventilation.
Industry:Mining
The quantity of coal or coke taken by a single sweep of the sampling instrument.
Industry:Mining
The quantity of electricity carried past any point of a circuit in 1 h by a steady current of 1 A; 1 A.h equals 3,600 C.
Industry:Mining
The quantity of heat accompanying a constitutional change in a solid chemical compound or metal, e.g., the change from gamma to alpha iron. The temperature at which one crystalline form of a substance is converted into another solid modification is known as the transition point or transition temperature.
Industry:Mining
The quantity of heat consumed or liberated in a chemical reaction as heat of combustion, heat of neutralization, or heat of formation. For example, the number of calories of heat absorbed when 1 g at wt of carbon reacts with 1 g mol wt of oxygen to form 1 g mol wt of carbon dioxide.
Industry:Mining
The quantity of heat liberated or consumed when a substance takes up water.
Industry:Mining
The quantity of heat liberated when a unit weight or a unit volume of a fuel is completely burned.
Industry:Mining
The quantity of heat required to raise 1 g of water from 14.5 degrees C to 15.5 degrees C.
Industry:Mining
