- 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 ...
A measure of the rate of heat loss from the bulb of the kata thermometer. Although the cooling power as obtained by this instrument is not a measure of the capacity of an atmosphere to cool the human body, nevertheless, it is useful for comparing different atmospheres and provides a convenient index of the comfort condition of a working place in a mine. Experience indicates that a face will be reasonably comfortable for working if the dry kata cooling power is above 7 on the kata thermometer and the air velocity above 1 m/s.
Industry:Mining
A measure of the toxic fumes to be expected when a specific explosive is properly detonated.
Industry:Mining
A measure of the vibrational energy absorbed by the rock and may be considered to be a measure of the internal friction. It is determined by the sharpness of resonance that is evident when a specimen is vibrated through a range of frequencies centered on the fundamental longitudinal resonant frequency. Damping of the dry type (coulomb damping) is commonly assumed to be independent of the velocity, and thus independent of the frequency, and is somewhat sensitive to moisture content.
Industry:Mining
A measure of the vibrational energy absorbed by the rock and may be considered to be a measure of the internal friction. It is determined by the sharpness of resonance that is evident when a specimen is vibrated through a range of frequencies centered on the fundamental longitudinal resonant frequency. Damping of the dry type (coulomb damping) is commonly assumed to be independent of the velocity, and thus independent of the frequency, and is somewhat sensitive to moisture content.
Industry:Mining
A measure of the weathering characteristics of coal, according to a standard laboratory procedure.
Industry:Mining
A measure of the weathering characteristics of coal, according to a standard laboratory procedure.
Industry:Mining
A measure of the workability of a metal subject to a drawing process. This term is usually expressed to indicate a metal's ability to be deep-drawn.
Industry:Mining
A measure of warmth that is often employed to assess the health and comfort conditions of mine workings, which are a function of dry- and wet-bulb temperatures and air velocity.
Industry:Mining
A measure, in terms of temperature, of fusion of coal ash prepared and tested under standard conditions.
Industry:Mining
A measurement of the rate of flow past a geographically fixed point; current meter methods.
Industry:Mining
