overburden
1Overburden — 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 …
2Overburden — O ver*bur den, v. t. To load with too great weight or too much care, etc. Sir P. Sidney. [1913 Webster] …
3Overburden — O ver*bur den, n. The waste which overlies good stone in a quarry. Raymond. [1913 Webster] …
4overburden — index disadvantage, exploit (take advantage of), harass, impact, mishandle (maltreat), mistreat …
5overburden — (v.) to put too much weight on, 1530s, from OVER (Cf. over) + BURDEN (Cf. burden) (v.). Earliest uses are figurative. Related: Overburdened; overburdening …
6overburden — ► VERB ▪ burden excessively …
7overburden — [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 …
8overburden — 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… …
9Overburden 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 …
10Overburden 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… …
