- 行业: Mining
- Number of terms: 33118
- Number of blossaries: 0
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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 term includes drawbars, chains, shackles, detaching hooks, etc., used in haulage, winding, and hoisting.
Industry:Mining
The term is applied to conduits, moldings, and other hollow material, often concealed, through which wires are fished from one outlet to another.
Industry:Mining
The term is used with reference to brittle materials; i.e., materials in which failure occurs through tensile rupture rather than through excessive deformation. For a member of given form, size, and material, loaded and supported in a given manner, the rupture factor is the ratio of the fictitious maximum tensile stress at failure, as calculated by the appropriate formula for elastic stress, to the ultimate tensile strength of the material as determined by a conventional tension test.
Industry:Mining
The term pea grit has been used for a coarse pisolitic limestone. Such usage should be discontinued; it is erroneous. The term grit should be reserved for a coarse-grained sandstone composed of angular particles.
Industry:Mining
The term proceedings is broader than the term action, yet in the mining law it is used in the sense of action and refers to the commencement of an action. It is used to enable a party to institute such proceedings under the different forms of actions allowed by the State and Federal courts.
Industry:Mining
The term used in a coal mining lease as the basis for the price per ton to be paid for mining. It is not a fixed, unvarying quantity of mine-run material, but is such a quantity of material as operators and miners may, from time to time, agree as being necessary or sufficent to produce a ton of prepared coal.
Industry:Mining
The term was introduced by G. H. Cady in 1942, to designate plant forms or fossils in coal as distinguished from the material of which the fossils may be composed. Phyterals are identified in general botanical terms that are usually morphological, such as spore coat, sporangium, cuticle, resin, wax, wood substance, bark, etc. The initial composition of the phyterals differed; these or other differences produced during diagenesis may or may not be perpetuated by and during carbonification (coalification). Phyterals are recognized with increasing difficulty in high rank coals. In contrast to macerals which represent a purely petrographical concept, the concept phyteral demands strict correlation with certain organs of the initial plant material.
Industry:Mining
The term was introduced by M.C. Stopes in 1919 to designate the macroscopically recognizable dull bands in coals. Bands of durain are characterized by their gray to brownish-black color and rough surface with dull or faintly greasy luster; reflection is diffuse; they are markedly less fissured than bands of vitrain, and generally show granular fracture. In humic coals, durain occurs in bands up to many centimeters in thickness. Widely distributed, but with exceptions not abundant. Compare: fusain; vitrain.
Industry:Mining
The terms "claim of right," "claim of title," and "claim of ownership," when used in the books to express adverse intent, mean nothing more than the intention of the dissessor to appropriate and use the land as his or her own to the exclusion of all others, irrespective of any semblance or shadow of actual title.
Industry:Mining
The terms "vein or lode" and "vein or lode claim" are used indiscriminately and interchangeably, and it follows that the term "vein or lode" is intended to be synonymous with the term "vein or lode claims."
Industry:Mining
