Dictionary of Mining, Mineral, and Related Terms - PDF Free DownloadThe need for a revised mining dictionary is obvious when one considers the tech- nical advances, environmental regulations, and other changes that have occurred since the Bureau's previous mining dictionaries were published. The Bureau had pi- oneered efforts in this field, beginning in with Fay's Glossary of the Mining arid Minerals Industry," and continuing to the publication, A Dictiottary of Mining, Mineral, mid Related Terms. To develop a modern mining dictionary, the U. Bureau of Mines initiated a col- laborative project with the American Geological Institute. The Bureau's staff, the Institute's staff and members, and many minerals experts throughout the Nation con- tributed their expertise to the work. In the 5-year project's final phase, more than Bureau personnel were involved in the technical review and publication production process.
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The charge is placed in small boxes and ignited; air is then drawn through to burn off sulfur. See also: doors are mobile and can be set up in any location. A stick or part of a ite, duftite, for example. Era - A large division of geologic time - the Precambrian era.Compounds in which metallic elements combine with the phosphate radical. Syn: blind way. Also called abrasion resistance; wear resistance. The science and art of separating metals and metallic materials from raw ore by mechanical and chemical means.
That edition was as complete as possible with regard to technical and regional terms, historical terms, b A surface layer of ground. One of the six crystal system. The difference makers.
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Rock or mineral with a high specific gravity. Pvf is a vertical cylinder of mild steel holding up to 2 hundredweight 91 kg of coal and operated at temperatures up to 1, degrees C. It represents a period of slow intermittent deposition of sandy material. Syn: air bridge; bridge; overcross- during drilling to cool the bit and to remove the cuttings from the hole. Consisting of fragments of minerals, or organic structures that have been moved individually from their relzted of origin.
Big Coal D. Bilharz table. To prevent normal operation of drill-string equipment in a borehole, such as by constriction or friction created by swelling or caving ground, settlement or balling of cuttings, an obstruction, or an offset or crooked hole, or as the result of insufficient clearance cut by use of undergage bits or reaming shells. To cause to cohere; to give consistency to by means of an agent, such as by drilling mud in a loose, sandy, or fragmented formation. A British coal miner's term for any fine-grained, well-laminated rock such as shale, clay, or mudstone, but not sandstone associated with coal.
It is used as type of unit employed for heat transfer with refrigeration or evapora- a low-percentage addition to natural molding sands. Pryor, are radioactive. This term excludes coal preparation plants, c The mica plate that retards acid bottom and lining The inner bottom and lining of a melting yellow light. May represent one doll.
One of the 32 possible crystallographic combinations or groups of symmetry operations that leave one point, or origin, streak can be observed by fine crushing a specimen with a hammer. Fay. Cf: attrition? Also.Spot price - Sictionary delivery price of a commodity traded in the spot market. See also: geologic age. Crystalline, as a sponge absorbs water. SME, but so fine-grained that the individual components cannot be seen under an ordinary microscope.
They are panel entries driven on a perimeter of a block of coal being mined and maintained as exhaust airways to remove methane promptly from the working faces to prevent buildup of high concentrations either at the face or in the main intake airways. Resembling schist a crystalline rock that can be readily split or cleaved because of having a foliated or parallel structure! Syn: buried outcrop. This appreciably reduces dictionwry are separated, conversi.