underground survey
1Underground coal gasification — (UCG) is an in situ gasification process carried out in non mined coal seams using injection and production wells drilled from the surface, which enables the coal to be converted into product gas. The process is flexible in operation and is… …
2Survey — may refer to:Geography*Surveying, the technique and science of measuring positions and distances on Earth *Aerial survey, a method of collecting information using aerial photography *Cadastral survey, used to document land ownership, by the… …
3Survey marker — Survey markers, or survey monuments, are objects placed to mark key survey points on the earth s surface. They are used in geodetic and land surveying. Vertical elevation markers are also known as benchmarks, and horizontal position markers used… …
4Underground nuclear testing — Preparation for an underground nuclear test at the Nevada Test Site in the 1990s. Nuclear weapons …
5HISTORICAL SURVEY: THE STATE AND ITS ANTECEDENTS (1880–2006) — Introduction It took the new Jewish nation about 70 years to emerge as the State of Israel. The immediate stimulus that initiated the modern return to Zion was the disappointment, in the last quarter of the 19th century, of the expectation that… …
6tunnels and underground excavations — ▪ engineering Introduction Great tunnels of the world Great tunnels of the worldhorizontal underground passageway produced by excavation or occasionally by nature s action in dissolving a soluble rock, such as limestone. A vertical opening …
7United States Geological Survey — Seal Official …
8Soudan Underground Mine State Park — Hinweistafel auf Sohle 27. Der Soudan Underground Mine State Park ist ein State Park in Minnesota und liegt an der Stelle der Soudan Underground Mine am südlichen Ufer vom Lake Vermilion. Das Bergwerk ist das älteste, tiefste und ehemals reichste …
9seismic survey — method of investigating subterranean structure, particularly as related to exploration for petroleum, natural gas, and mineral deposits (mineral deposit). The technique is based on determinations of the time interval that elapses between… …
10Strategic Bombing Survey (Europe) — The United States Strategic Bombing Survey (Europe)cite web|last=|first=|url=http://aupress.au.af.mil/Books/USSBS/USSBS.pdf |format=pdf |title=United States Strategic Bombing Surveys (European War) (Pacific War)|work=|date=October 1987|accessdate …
