- 行业: Mining
- Number of terms: 33118
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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 samples of the rocks obtained during boring. The diamond and shot drill yield cores, while percussive drills yield sludge and chippings, which are examined to determine the nature of the rocks passed through. Borehole samples may also be required during site investigations.
Industry:Mining
The sampling of exposure in the stopes, or of material coming from the stopes. This type of sampling permits a closer control of the grade of ore being won and is conducted largely at the working place or stope.
Industry:Mining
The sampling of the same coal or coke received regularly at a given point. There are two forms of regular sampling, namely, continuous sampling and intermittent sampling.
Industry:Mining
The scale of a map, expressed in the form of a numerical fraction that relates linear distances on the map to the corresponding actual distances on the ground, measured in the same units (centimeters, inches, feet); e.g., 1/24,000 indicates that one unit on the map represents 24,000 equivalent units on the ground. Abbrev: RF.
Industry:Mining
The scales of effective temperature take into consideration the temperature, humidity, and speed of the air. The effects of radiant heat can be included in an assessment of effective temperature by using the globe thermometer temperature instead of the drybulb temperature in those cases when the reading of the globe thermometer is higher than the dry-bulb temperature. In such cases, the result is described as the corrected effective temperature.
Industry:Mining
The scattering or reflection of a strong beam of light by suspended colloids; no such scattering or reflection comes from true solutions.
Industry:Mining
The science of crystals and crystalline materials. It embraces crystallography and crystallogeny.
Industry:Mining
The science of determining, by any method, elevations on the Earth's surface with reference to sea level; e.g., barometric hypsometry in which elevations are determined by means of mercurial or aneroid barometers.
Industry:Mining
