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. Adits are also used to explore for mineral veins. See more Adits are driven into the side of a hill or mountain, and are often used when an ore body is located inside the mountain but above the adjacent valley floor or coastal plain. In cases where the mineral vein outcrops at the … See more Access to a mine by adit has many advantages over the vertical access shafts used in shaft mining. Less energy is required to transport miners and heavy equipment into and out of the mine. It is also much easier to bring ore or coal out of the mine. … See more • A "drift" is a more general term for any near-horizontal underground passage in a mine. Unlike an adit, a drift need not break out to the surface. Drift mining is the use of drifts to extract ore - in this case the drifts follow the vein. • A "level" is a horizontal passage that … See more • Earl, Bryan (1994). Cornish Mining: The Techniques of Metal Mining in the West of England, Past and Present (2nd ed.). St Austell: Cornish Hillside Publications. ISBN 0-9519419-3-3 See more Most adits are designed to slope slightly upwards from the entrance so that water will flow freely out of the mine. Mines that have adits can be … See more • Great County Adit, a system of over 40 miles (65 km) of adits used for dewatering more than 100 mines in the Gwennap area of See more • Glossary of coal mining terminology See more WebAn adit is a type of entrance to an underground mine which is horizontal or nearly horizontal. Adits are usually built into the side of a hill or Mountain, and often occur when a …
Interactive atlas of historical coal mine maps in …
WebIn coal mining: Access …to a coal seam, called portals, are the first to be completed and generally the last to be sealed. A large coal mine will have several portals. Their … WebJun 15, 2024 · Forgotten Beneath Us. There are over 8000 disused shafts and over 200 abandoned adits recorded. There are also many ancient workings that were used and … bison and wild horses are inhabitants of
CRANBERRY WILDERNESS STUDY AREA, WEST VIRGINIA.
WebAbandoned mine lands (AML) are those lands, waters, and surrounding watersheds contaminated or scarred by the extraction, beneficiation or processing of coal, ores, and minerals. Abandoned mine lands include … WebThe Denver coal basin of which the Boulder-Weld fields are part has the distinction of being one of the first deposits to be mined. Beginning in the 1860s and 1870s, settlers mined coal for local consumption by digging horizontal openings called adits into coal seams that were close to the surface. Webmining drift 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 … bison antlers or horns