What is an overcast in mining?
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What is an overcast in mining?
To place the overburden removed from coal in surface mines in an area from which the coal has been mined. iii. Pushed forward, so as to overlie other rocks, such as in thrust faults.
What is GOB in mining?
Gob – The term applied to that part of the mine from which the coal has been removed and the space more or less filled up with waste. Also, the loose waste in a mine. Also called goaf.
What is an adit in mining?
adit, a horizontal or near-horizontal passage driven from the Earth’s surface into the side of a ridge or mountain for the purpose of working, ventilating, or removing water from a mine. adit.
What is a mining elevator called?
Cage – In a mine shaft, the device, similar to an elevator car, that is used for hoisting personnel and materials.
What is overcast and Undercast?
Overcasting thus is when the estimated value turns out to be above the realized or actual value. Overcasting can be contrasted with undercasting, which is when a forecast is made too low.
What is ramp in mining?
In mining: Vertical openings: shafts and raises. …the underground is through a ramp—that is, a tunnel driven downward from the surface. Internal ramps going from one level to another are also quite common.
What are tunnels in a mine called?
An adit (from Latin aditus, entrance) is an entrance to an underground mine which is horizontal or nearly horizontal, by which the mine can be entered, drained of water, ventilated, and minerals extracted at the lowest convenient level.
What is an empty mine called?
An abandoned mine is a mine or quarry which is no longer producing or operational and, there is no responsible party to finance the cost to address the remediation and/or restoration of the mine feature/site.
What are miners called?
Loader (also called a “bandsman”), who loads the mining carts with coal at the face. Putter (also known as a “drags-man”), who works the carts around the mine. Barrow-man, who transported the broken coal from the face in wheelbarrows. Hurrier, who transported coal carts from a mine to the surface.
What is Undercast error?
Undercast refers to a forecasting error when estimated numbers turn out to be lower than realized numbers. The estimates that are valued can include sales, expenses, income, cash flows, or any other financial account or metric.
What is mining gallery?
gallery of a mine. The passage of horizontal communication, as distinguished from the shaft or vertical descent, made underground by military miners to reach the required position, for lodging the charge, &c.; it averages 4-1/2 feet high by 3 feet wide.
Why is mine water orange?
Mine drainage is formed when pyrite (an iron sulfide) is exposed and reacts with air and water to form sulfuric acid and dissolved iron. Some or all of this iron can precipitate to form the red, orange, or yellow sediments in the bottom of streams containing mine drainage.
