- 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 ...
The concentration of an airborne substance that shall not be exceeded during any part of the working exposure.
Industry:Mining
The concentration of an element in a mineral or rock relative to its crustal abundance. The term is applied to specific as well as average occurrences. Compare: clarke
Industry:Mining
The concentration of explosive effect (i.e. jetting) which occurs at a cavity at the end of an explosive charge; this effect is the basis of the design and performance of shaped charges.
Industry:Mining
The concentration of gases, including oxygen, that are present in a mine. Safe levels are maintained through ventilation. Measured at any point at least 12 in (30.5 cm) away from the back, face, rib, and floor in any mine.
Industry:Mining
The concept that where there is no change of state, seawater is incompressible and the liquid matter is neither created nor destroyed. If there is any vertical contraction in a volume of fluid, therefore, there must be a horizontal expansion, so that the original volume is maintained. This is accomplished by motion resulting in changes of the shape of the original parcel of water.
Industry:Mining
The concretions, primarily of manganese salts, covering extensive areas of the ocean floor. These vary in size from extremely small to some 6 in (15.2 cm) in diameter. They have a layer configuration and may prove a useful source of minerals.
Industry:Mining
The concurrent firing of a round of shots using instantaneous detonators.
Industry:Mining
The condensation of dust and fumes from calcining furnaces by use of large flues filled with parallel rows of sheet iron.
Industry:Mining
The condition during rotary drilling when the drilling mud escapes into porous, fractured, or cavernous rocks penetrated by the borehole and does not return to the surface.
Industry:Mining
The condition in sedimentation in which each floc or particle settles freely; i.e., its movement is not influenced in any way by other flocs or particles in suspension.
Industry:Mining
