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  • Glossary of Mining Terms - Coal Education

    A. 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 ...

  • Gotthard tunnel, world's longest, opens in Switzerland - CNN

    May 31, 2016 · (CNN)Seventeen years after construction crews started boring beneath the Swiss Alps, the world's longest, deepest tunnel officially opened Wednesday. Fittingly for a project billed as Switzerland's "construction of the century," the Gotthard Base Tunnel was inaugurated amid colorful, sometimes ...

  • Henry Foundation Drilling - Specializing in Deep Foundation ...

    Tunnel Boring for Rapid Transit, Port Moody, B.C. This project saw us deploy three drill rigs to construct a secant pile wall that will allow a tunnel-boring machine to drill through Burnaby Mountain.

  • Project Camelot | Underground bases and tunnels

    The first section of this page was written by Phil Schneider:. Photo of United States Air Force tunnel boring machine at Little Skull Mountain, Nevada, USA, December 1982.

  • Mysterious 'unknown object' blocks progress of huge drilling ...

    What is the mysterious 'unknown object' blocking progress of huge drilling machine boring out new highway below Seattle? The highway tunnel is being dug 45 feet below ground

  • Hoosac Tunnel Ghosts

    Ghosts. The following text was taken from Historic Haunted America by Michael Norman & Beth Scott. Copyright 1995. I cannot confirm or deny of of the stories written here.

  • The Bore - Hoosac Tunnel

    The Bore. This page is dedicated to explaining how the Hoosac Tunnel was actually "dug". When The Hoosac Tunnel was chartered, it was expected to take about 4 1/2 years to finish.

  • Norway's Bold, Maybe Foolhardy Plan to Build the World's ...

    With the service routes established and the roof secured, workers will resume drilling and blasting through the mountain in horizontal segments, removing chunks of rock up to 44,000 pounds apiece.

  • Tunnel Update - February 2018 - Tunnel Business Magazine

    Three times per year, TBM: Tunnel Business Magazine recaps the status of major tunneling projects underway in the United States and Canada. Below is the Tunnel Update that appeared in the February 2018 issue of the print edition.

  • Tunnelbuilder - Official Site

    tunnelbuilder.com is the leading marketing resource for the world's tunnelling industry providing the latest project news on the world's tunnels

  • Hoosac Tunnel - Boudillion

    Introduction: The Hoosac Tunnel, a railroad tunnel beneath the Berkshire Mountains in Western Massachusetts, is said to be one of the most haunted places in New England.

  • Tunnels and underground excavations | engineering ...

    Tunnels and underground excavations: Tunnels and underground excavations, horizontal underground passageway produced by excavation or occasionally by nature's action in dissolving a soluble rock, such as limestone.

  • Video: Walmart 'Plumbing' Issue Related To DHS Underground ...

    Is it possible that these abrupt closures have something to do with the Department of Homeland Security and the integration of private businesses with broader

  • Glossary of Mining Terms - Rock, Mineral and Fossil ...

    Back — The roof or upper part in any underground mining cavity. Backfill — Mine waste or rock used to support the roof after coal removal. Barren — Said of rock or vein material containing no minerals of value, and of strata without coal, or containing coal in seams too thin to be workable.

  • Seikan Tunnel - Wikipedia

    The Seikan Tunnel (トンネル, Seikan Tonneru, or Seikan Zuidō) is a 53.85 km (33.46 mi) dual gauge railway tunnel in Japan, with a 23.3 km (14.5 mi) long portion under the seabed.

  • Geotechnical Engineering - Geoengineering

    martindale's calculators on-line center engineering center geotechnical engineering center geoengineering, geology engineering, rock engineering, tunnel engineering ...

  • Underground mining equipment - DirectIndustry

    Find and compare all the manufacturers in the Construction and Mining Equipment,Underground mining equipment category and contact them directly.

  • Mining Equipment, Breaking, Drilling & Crushing Products ...

    A world leader in mining equipment and rock excavation. Our constantly evolving offering for mining and rock excavation covers rock drilling, rock cutting, crushing and screening, loading and hauling, tunneling, quarrying and breaking and demolition.

  • Elon Musk tweets photo of his giant tunnel boring machine ...

    Elon Musk isn't the type of man who waits around for a problem to fix itself. After being stuck in heavy traffic in December, the billionaire came up with a plan to create a giant tunnel under Los Angeles to ease congestion. 'Traffic is driving me nuts. Am going to build a tunnel boring machine ...

  • Pipeline Practice Guide | Huckbody Environmental Ltd

    Pre-construction drainage. Drains are installed on the upper side of the ROW to divert water that would otherwise make construction difficult. In the UK, trenches are often dug and drainage pipes buried, often with a drainage machine.

  • Drilling and Foundation Equipment | Soilmec S.p.A.

    Soilmec S.p.A is an international company leader in design, manufacture, and distribution of equipment for the ground engineering industry, drilling and foundation.

  • Tunnel - Wikipedia

    A tunnel is an underground passageway, dug through the surrounding soil/earth/rock and enclosed except for entrance and exit, commonly at each end. A pipeline is not a tunnel, though some recent tunnels have used immersed tube construction techniques rather than traditional tunnel boring methods.

  • Fourth Doctor - Wikiquote

    This page is a collection of quotations from the era of the fourth official incarnation of The Doctor from the BBC science fiction television programme Doctor Who, during which the role of the Fourth Doctor was played by Tom Baker.

  • machine - Dizionario inglese-italiano WordReference

    machine - Traduzione del vocabolo e dei suoi composti, e discussioni del forum.

  • GeoDrill Australia – Geotechnical, Environmental & Water Bore ...

    GeoDrill Australia is a domestic & irrigation water bore and geotechnical & environmental drilling company with the added capability of mineral & coal exploration.