- 行业: Mining
- Number of terms: 33118
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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 first of a series of washers, receiving raw feed, from which at least one product is retreated.
Industry:Mining
The first period of the Cenozoic Era (after the Cretaceous of the Mesozoic Era and before the Quaternary), thought to have covered the span of time between 65 million years and 3 to 2 million years ago. It is divided into five epochs: the Paleocene, Eocene, Oligocene, Miocene, and Pliocene. It was originally designated an era rather than a period; in this sense, it may be considered to have either five periods (Paleocene, Eocene, Oligocene, Miocene, Pliocene) or two (Paleogene and Neogene), with the Pleistocene and Holocene included in the Neogene.
Industry:Mining
The fixed point on a drill rig or deadman to which a deadline of a block and tackle is attached.
Industry:Mining
The fixing of a evaluation, not an appraisal. Used in preference to the word valuation which is often confused with appraisal.
Industry:Mining
The fixing of the center spot of a proposed shaft at the site selected and the maintenance of the shaft sinking along this plumb line during its entire depth.
Industry:Mining
The flammability of a coal-dust cloud is its ability to promote spreading flames away from the source of ignition.
Industry:Mining
The flat upper surface of a salt stock, along which ground-water solution leads to the formation of cap rock by freeing anhydrite (Goldman, 1952).
Industry:Mining
