Mining Glossary
There are 491 entries in this glossary.All
| Term | Definition |
|---|---|
| A$ |
Australian dollars
See
Mining and Exploration
Source: www.infomine.com
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| Abutment |
In coal mining, (1) the weight of the rocks above a narrow roadway is transferred to the solid coal along the sides, which act as abutments of the arch of strata spanning the roadway; and (2) the weight of the rocks over a longwall face is transferred to the front abutment, that is, the solid coal ahead of the face and the back abutment, that is, the settled packs behind the face.
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Mining and Exploration
Source: www.infomine.com
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| Acid deposition or acid rain |
Refers loosely to a mixture of wet and dry "deposition" (deposited material) from the atmosphere containing higher than "normal" amount of nitric and sulfuric acids. The precursors or chemical forerunners of acid rain formation result from both natural sources, such as volcanoes and decaying vegetation, and man-made sources, primarily emissions of sulfur and nitrogen oxides resulting from fossil fuel combustion.
See
Mining and Exploration
Source: www.infomine.com
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| Acid mine water |
Mine water that contains free sulfuric acid, mainly due to the weathering of iron pyrites.
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Mining and Exploration
Source: www.infomine.com
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| Active workings |
Any place in a mine where miners are normally required to work or travel and which are ventilated and inspected regularly.
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Mining and Exploration
Source: www.infomine.com
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| Adit |
A nearly horizontal passage from the surface by which a mine is entered and dewatered. A blind horizontal opening into a mountain, with only one entrance.
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Mining and Exploration
Source: www.infomine.com
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| Advance |
Mining in the same direction, or order of sequence; first mining as distinguished from retreat.
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Mining and Exploration
Source: www.infomine.com
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| Aeromagnetic |
Measurement of the strength and orientation of the earth’s magnetic field acquired using an airborne instrument.
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Mining and Exploration
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| Ag |
The symbol for silver (Argentium) on the Periodic Table.
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Mining and Exploration
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| Air split |
The division of a current of air into two or more parts.
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Mining and Exploration
Source: www.infomine.com
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| Airway |
Any passage through which air is carried. Also known as an air course.
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Mining and Exploration
Source: www.infomine.com
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| Alluvial deposits |
Material, typically sands and gravels, transported by a river and deposited at points on the river’s flood plain. These deposits can contain economically viable mineral resources. In the Kondyor and Koryak areas of eastern Russia alluvial deposits are mined for platinum group metals.
See
Mining and Exploration
Source: www.infomine.com
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| Anemometer |
Instrument for measuring air velocity.
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Mining and Exploration
Source: www.infomine.com
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| Angle of dip |
The angle at which strata or mineral deposits are inclined to the horizontal plane.
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Mining and Exploration
Source: www.infomine.com
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| Angle of draw |
In coal mine subsidence, this angle is assumed to bisect the angle between the vertical and the angle of repose of the material and is 20 ? for flat seams. For dipping seams, the angle of break increases, being 35.8 ? from the vertical for a 40 ? dip. The main break occurs over the seam at an angle from the vertical equal to half the dip.
See
Mining and Exploration
Source: www.infomine.com
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