- 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 ...
Resistance by a body to angular acceleration about a specific axis of rotation.
Industry:Mining
Resistance that causes vortices and eddies to form behind a moving particle because of the rapid displacement of the liquid when the body moves through it. Compare: viscous resistance
Industry:Mining
Resistance to crumbling, to abrasion, or to coarse particles being dislodged from the brick structure.
Industry:Mining
Resources from which estimates are based on an assumed continuity beyond measured and/or indicated resources, for which there is geologic evidence. Inferred resources may or may not be supported by samples or measurements.
Industry:Mining
Resources from which the quantity and grade and/or quality are computed from information similar to that used for measured resources, but the sites for inspection, sampling, and measurement are farther apart or are otherwise less adequately spaced. The degree of assurance, although lower than that for measured resources, is high enough to assume continuity between points of observation.
Industry:Mining
Resources from which the quantity is computed from dimensions revealed in outcrops, trenches, workings, or drill holes; grade and/or quality are computed from the results of detailed sampling. The sites for inspection, sampling, and measurement are spaced so closely and the geologic character is so well defined that size, shape, depth, and mineral content of the resource are well established.
Industry:Mining
Resources whose location, grade, quality, and quantity are known or estimated from specific geologic evidence. Identified resources include economic, marginally economic, and subeconomic components. To reflect varying degrees of geologic certainty, these economic divisions can be subdivided into measured resources, indicated resources, and inferred resources.
Industry:Mining
Resources, the existence of which are only postulated, comprising deposits that are separate from identified resources. Undiscovered resources may be postulated in deposits of such grade and physical location as to render them economic, marginally economic, or subeconomic. To reflect varying degrees of geologic certainty, undiscovered resources may be divided into hypothetical resources and speculative resources.
Industry:Mining
Retention and retreatment of ore in part of flow a line until it satisfies criteria for release. Used in comminution to reduce overgrinding by passing intermediate particles repeatedly through grinding systems, classifying the product and returning oversize. Used in concentration (e.g., rougher-scavenger-cleaner flotation) to retain a selected fraction of ore in circuit for retreatment (a middling), until it is either upgraded to rank as concentrate or sufficiently denuded of value to be rejected as tailing.
Industry:Mining
Rhythmic layering or alignment of minerals in an igneous rock, confined to troughlike depressions and considered to have been produced by currents set up in the magma during cooling.
Industry:Mining
