overburden
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Overburden — is the material that lies above an area of economic or scientific interest in mining and archaeology; most commonly the rock, soil, and ecosystem that lies above a coal seam or ore body. It is also known as waste or spoil . Overburden is distinct … Wikipedia
Overburden — O ver*bur den, v. t. To load with too great weight or too much care, etc. Sir P. Sidney. [1913 Webster] … The Collaborative International Dictionary of English
Overburden — O ver*bur den, n. The waste which overlies good stone in a quarry. Raymond. [1913 Webster] … The Collaborative International Dictionary of English
overburden — (v.) to put too much weight on, 1530s, from OVER (Cf. over) + BURDEN (Cf. burden) (v.). Earliest uses are figurative. Related: Overburdened; overburdening … Etymology dictionary
overburden — ► VERB ▪ burden excessively … English terms dictionary
overburden — [ō΄vər bʉrd′ n; ] for n. [ ō′vər bʉrd΄ n] vt. to burden oppressively; weigh down n. 1. something that overburdens 2. Geol. soil, rock, etc. that is covering or overlying a useful deposit, as of ore … English World dictionary
overburden — UK [ˌəʊvə(r)ˈbɜː(r)d(ə)n] / US [ˌoʊvərˈbɜrd(ə)n] verb [transitive] Word forms overburden : present tense I/you/we/they overburden he/she/it overburdens present participle overburdening past tense overburdened past participle overburdened formal… … English dictionary
Overburden pressure — Overburden pressure, also called lithostatic pressure or vertical stress, is the pressure or stress imposed on a layer of soil or rock by the weight of overlying material. The overburden pressure at a depth z is given by where ρ(z) is the density … Wikipedia
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
Overburden Conveyor Bridge F60 — The F60 in Lichterfeld, along the entire length F60 is the series designation of five overburden conveyor bridges used in brown coal (lignite) opencast mining in the Lusatian coalfields in Germany. They were built by the former Volkseigener… … Wikipedia
