- overburden thickness
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• мощность перекрывающих отложений• мощность покрывающей толщи
English-Russian dictionary of geology. 2011.
English-Russian dictionary of geology. 2011.
Overburden ratio — Overburden ratio refers to the amount of overburden that must be removed to excavate a given quantity of coal. It is commonly expressed in cubic yards per ton of coal, but is sometimes expressed as a ratio comparing the thickness of the… … Energy terms
Bemolanga — is the name of a large tar sands deposit in the onshore Morondava Basin of Madagascar discovered in the early 1900s. Madagascar Oil is current license holder of the Bemolanga field. It describes the field as being a giant bitumen field of 8… … Wikipedia
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mining — /muy ning/, n. 1. the act, process, or industry of extracting ores, coal, etc., from mines. 2. the laying of explosive mines. [1250 1300; ME: undermining (walls in an attack); see MINE2, ING1] * * * I Excavation of materials from the Earth s… … Universalium
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Strip or stripping ratio — The amount of overburden that must be removed to gain access to a unit amount of coal. A stripping ratio may be expressed as (1) thickness of overburden to thickness of coal, (2) volume of overburden to volume coal, (3) weight of overburden to… … Energy terms
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metamorphic rock — Any of a class of rocks that result from the alteration of preexisting rocks in response to changing geological conditions, including variations in temperature, pressure, and mechanical stress. The preexisting rocks may be igneous, sedimentary,… … Universalium
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permafrost — /perr meuh frawst , frost /, n. (in arctic or subarctic regions) perennially frozen subsoil. Also called pergelisol. [1943; PERMA(NENT) + FROST] * * * Perennially frozen earth, with a temperature below 32 °F (0 °C) continuously for two years or… … Universalium