- Industry: 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 ...
Carbon monoxide, CO. A gas that may be present in the afterdamp of a gas- or coal-dust explosion, or in the gases given off by a mine fire; also one of the gases produced by blasting. It is an important constituent of illuminating gas, supports combustion, and is very poisonous because it is absorbed by the hemoglobin of the blood to the exclusion of oxygen.
Industry:Mining
In the roof of a coal seam, a deposit of glacial debris formed by scour and fill subsequent to coal formation.
Industry:Mining
Explosive charges spaced at intervals in a quarry or opencast blast hole.
Industry:Mining
One of several implements used collectively to arrest a cage or skip in the event of an overwind using a multirope friction winder. Frictional forces, which gradually increase by virtue of the wedging action of the guides, are relied upon to bring the cage to rest and hold it in a stationary position with the aid of jack catches.
Industry:Mining
Concentration of crystals of a particular mineral (or minerals) in certain parts of a magma during its cooling and crystallization. Some ore deposits (i.e., magmatic ore deposits) are formed in this way.
Industry:Mining
Constructive interference of monochromatic light; e.g., labradorescence in plagioclase, fire in opal.
Industry:Mining
Much more sensitive than the common dip needle. The instrument consists of a magnetic needle free to rotate about a horizontal axis and a nonmagnetic bar with a counterweight at the end which is attached to the needle at its pivot, the two axes making an angle that can be varied. It measures changes in the total field and can be used to measure variations in the vertical field if its plane is oriented in a direction perpendicular to the magnetic meridian.
Industry:Mining
Drill purposely directed away from a normal, straight course in order to bypass an obstruction or to straighten the hole; or to redirect the deeper portion by redrilling to an alternate bottom-hole location.
Industry:Mining
Homogeneous phase (gas, liquid, or solid) through which particles are dispersed to form a relatively stable sol. Mainly descriptive of colloidal dispersion.
Industry:Mining
In optical mineralogy, a dispersion phenomenon in which the boundary of a mineral grain (Becke line) immersed in a liquid of the same index of refraction appears blue on one side and red to orange on the other.
Industry:Mining
