Search results
Results from the WOW.Com Content Network
Overburden at a coal mining site. In mining, overburden (also called waste or spoil) is the material that lies above an area that lends itself to economical exploitation, such as the rock, soil, and ecosystem that lies above a coal seam or ore body.
Overburden pressure is a geology term that denotes the pressure caused by the weight of the overlying layers of material at a specific depth under the earth's surface. [1] Overburden pressure is also called lithostatic pressure , or vertical stress.
Preconsolidation pressure is the maximum effective vertical overburden stress that a particular soil sample has sustained in the past. [1] This quantity is important in geotechnical engineering, particularly for finding the expected settlement of foundations and embankments.
Dr. Leana Wen, former Baltimore Health Commissioner, explains why she doesn’t think the U.S. has not gotten through the first wave of coronavirus and why she says a national testing strategy is ...
The overburden from MTR is either placed back on the ridge, attempting to reflect the approximate original contour of the mountain, [4] and/or is moved into neighboring valleys. [5] When excess rock and soil containing mining byproducts are disposed into nearby valleys, the valleys are called "holler fills" or "valley fills". [1] [3] [6]
The Siilinjärvi carbonatite complex, [1] an open-pit mine owned by Yara International, in Siilinjärvi, Finland Coal strip mine in Wyoming. Surface mining, including strip mining, open-pit mining and mountaintop removal mining, is a broad category of mining in which soil and rock overlying the mineral deposit (the overburden) are removed, in contrast to underground mining, in which the ...
The overburden conveyor bridge of Lichterfeld-Schacksdorf, now shut down, was used from 1991 until 1992 in the brown coal mine Klettwitz-Nord near Klettwitz. It is open for visitors today as a project of the Internationale Bauausstellung Fürst-Pückler-Land (International Mining Exhibition Fürst-Pückler-Land) and is an anchor of the European ...
The Bagger 288 was built for the job of removing overburden before coal mining at the Hambach surface mine in Germany. It can excavate 240,000 tons of coal [8] or 240,000 cubic metres of overburden daily [9] – the equivalent of a soccer field dug to 30 m (98 ft) deep. The coal produced in one day fills 2400 coal wagons.