- knolik
adit
Значение термина adit в knolik
adit - Adit (Lat. aclitus, entrance)
adit - Opening driven into a mine horizontally, not, as a shaft, vertically. Adits are generally driven on a slight up-gradient to allow of a ready flow of water, their principal purpose being for drainage, although they are also used for ventilation. In mining districts very long adits have been driven which serve to drain such districts of water, and effect immense economies in dealing with mine water.
Ancient mining was carried out by adits, probably the oldest method. Both coal and lead wore mined in this way. A vertical shaft was often driven to take out the minerals, the horizontal adit being used to remove water and provide ventilation, assisted by fires in the vertical shafts.
Рядом со словом adit в knolik
| adirondack mountains | В начало буква "" буквосочетание "" | adjame |
Статья про adit была прочитана 278 раз
- - TOP 200
- - mycophyta
- - alloys furnaces
- - binomial nomenclature
- - alloys, bronze
- - ainley, henry hinchliffe
- - august 21
- - ranunculus trichophyllus chaix
- - ranunculus fluitans lamarck
- - ranunculus hederaceus l.
- - ranunculus heterophyllus weber
Our friends, knolik encyclopaedia knolik.com