overburden slope

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• 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

• Vegetation and slope stability — are interrelated by the ability of the plant life growing on slopes to both promote and hinder the stability of the slope. The relationship is a complex combination of the type of soil, the rainfall regime, the plant species present, the slope… …   Wikipedia

• Algific talus slope — Algific talus slopes comprise a rare, fragile ecosystem stated to exist only in the Driftless Area of Minnesota, Wisconsin, Illinois, and especially, Iowa. [http://files.dnr.state.mn.us/natural resources/npc/cliff talus/cts46.pdf Cliff/Talus… …   Wikipedia

• coal mining — Coal was very important in the economic development of Britain. It was used as fuel in the factories built during the Industrial Revolution and continued to be important until the 1980s. The main coalfields are in north east England, the north… …   Universalium

• 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

• Coal mining — Men leaving a UK colliery at the close of a shift Surface coal mining in Wyo …   Wikipedia

• Surface mining methods —   Auger mining recovers coal through the use of a large diameter drill driven into a coalbed in the side of a surface mine pit. It usually follows contour surface mining, particularly when the overburden is too costly to excavate.   Area mining… …   Energy terms

• Mass wasting — at Palo Duro Canyon, West Texas (2002) …   Wikipedia

• Mining — This article is about the extraction of geological materials from the Earth. For the municipality in Austria, see Mining, Austria. For the siege tactic, see Mining (military). For name of the Chinese emperor, see Daoguang Emperor. Simplified… …   Wikipedia

• Mountaintop removal mining — Mountaintop removal site Mountaintop removal in Martin County, Kentucky M …   Wikipedia

• Exfoliation joint — Exfoliation joints wrapping around Half Dome in Yosemite National Park, California …   Wikipedia