- 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 radioactive isotope of hydrogen having two neutrons and one proton in the nucleus. Being hydrogen-3, it is heavier than deuterium (heavy hydrogen or hydrogen-2).
Industry:Mining
The radioactivity log curve of the intensity of broad-spectrum, undifferentiated natural gamma radiation emitted from the rocks in a cased or uncased borehole. It is used for correlation, and for distinguishing shales (which are usually richer in naturally radioactive elements) from sandstones, carbonates, and evaporites. Compare: spectral gammaray log
Industry:Mining
The raising up of masses of machinery and heavy structures by means of jacks.
Industry:Mining
The ram or monkey, or falling weight, of a piledriver, drophammer, etc.; specif., the heavy head of a steam hammer in which the upper pallet is secured.
Industry:Mining
The range between the upper and lower limit of a cycle of stress, such as is applied in a fatigue test. The midpoint of the range is the mean stress.
Industry:Mining
The rank of coal, within the anthracite class of Classification D-388, such that, on the dry and mineral-matter-free basis, the volatile matter content of the coal is equal to or 1955 less than 2% (or the fixed carbon is equal to or greater than 98%), and the coal is nonagglomerating.
Industry:Mining
The rank of coal, within the anthracitic class of Classification D 388, such that, on the dry and mineral-matter-free basis, the volatile matter content of the coal is greater than 8% but equal to or less than 14% (or the fixed carbon content is equal to or greater than 86% but less than 92%), and the coal is nonagglomerating.
Industry:Mining
The rank of coal, within the bituminous class of Classification D 388, such that, on the dry and mineral-matter-free basis, the volatile matter content of the coal is greater than 14% but equal to or less than 22% (or the fixed carbon content is equal to or greater than 78% but less than 86%), and the coal commonly agglomerates. Compare: bituminous coal
Industry:Mining
