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United States Bureau of Mines
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 upper or lower two faces of a dome resulting from symmetry lower than that required for a dome in orthorhombic or monoclinic crystal systems.
Industry:Mining
The upper part of the lithosphere in which rocks are under stresses less than the stresses required to close their interstices by deformation of the walls of the interstices.
Industry:Mining
The Upper Productive Coal Measures of the Pennsylvanian, of which they constitute the highest member.
Industry:Mining
The Upper Rhaetic, as opposed to the overlying Blue Lias.
Industry:Mining
The upper stage in a porcelain furnace.
Industry:Mining
The upper wall of an inclined fault plane.
Industry:Mining
The upright timber that supports the cap piece in a mine. Compare: legs
Industry:Mining
The upward heave of the floor beds after a coal seam has been extracted.
Industry:Mining
The use of a cement or other sealant in a borehole. Seal off is not synonymous with blankoff and case off, where securing the walls of a borehole is accomplished by setting pipe or casing. Compare: blankoff; seal.
Industry:Mining
The use of a nuclear explosive for fracturing and fragmenting large volumes of ore underground into rubble chimneys, in preparation for block-cave-type mining or in-situ leaching.
Industry:Mining
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