- 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 end of a magnet that points approx. north. The other end is the south-seeking pole.
Industry:Mining
The end of a ridge that has been truncated or steeply beveled by stream erosion, glaciation, or faulting.
Industry:Mining
The endless chain carrying picks that travels around the jib of a chain coal cutter at a speed varying from 320 to 650 ft/min (97.6 to 198.2 m/min).
Industry:Mining
The endless-rope system generally used on moderate and constant gradients where the floor is good. In this system, the rope runs underneath the tubs or cars in the center of the rails. Curves are negotiated by a series of small vertical pulleys between the rails and are best of large radius. Clips are generally preferred to lashing chains, and the system suits automatic clipping and unclipping. Compare: overtub system.
Industry:Mining
The energetic action of finely divided aluminum on a metallic oxide, when heated together, is utilized for the production of metallic iron manganese, chromium, tungsten, molybdenum, uranium, etc. The aluminum combines directly with the oxygen of the oxide, and the heat emitted by the reaction is sufficient to promote the fusion of the reduced metal.
Industry:Mining
The energy consumed in the ventilation system to overcome all flow head losses. It includes all the decreases in total head (supplied from static head) that occur between the entrance and discharge of the system.
Industry:Mining
The energy per unit time entering a sphere of unit cross-sectional area centered at a given place. The unit of intensity is the erg per square centimeter second or the watt per square centimeter.
Industry:Mining
The energy required for reduction in particle size of a solid is directly proportional to the increase in surface area. Compare: Kick's law.
Industry:Mining
The Engineering News formula for calculating the load-bearing capacity of driven piles.
Industry:Mining
