Underground mining was described in this account, although it cannot be determined when it had started.

Schematic of a Underground mining ( hard rock ) | cut and fill mining operation in hard rock.

Underground longwall mining.

Underground hard rock mining refers to various underground mining techniques used to excavate hard minerals, mainly those containing metals such as ore containing gold, silver, iron, copper, zinc, nickel, tin and lead, but also involves using the same techniques for excavating ores of gems such as diamonds.

Category: Underground mining

Underground coal mining commenced around 1899 by the Seattle and San Francisco Railway and Navigation Company, although coal had been mined in nearby Danville and Landsburg a few years earlier.

* NORCAT's Underground Mine Centre ( Fecunis Adit ), used for underground training and mining technology development in Onaping, ON, Canada

Category: Underground mining

* Underground mining equipment

Underground mining continued sporadically until 1922, when the last of the pumps was shut off causing the mines to flood.

Underground coal mining brings with it the problem of subsidence.

Underground mining ceased in Snailbeach in 1955.

Underground mining began with the Day Dawn mine in 1931 ; a number of similar operations were opened before and after the Second World War.

Now it is mainly a tourist destination and home to the Kimberley Alpine Resort, a ski area and the Kimberley Underground Mining Railway that features a underground mining interpretive centre.

Category: Underground mining

Underground mining in the area was begun in 1890, and Daniel C. Jackling and Robert C. Gemmell, both engineers, examined Wall's properties and recommended open-pit mining.

Category: Underground mining

Underground mining developed in the 19th Century, but the stone trade declined in the 20th Century stopping in the 1960s.

Category: Underground mining

* Underground mining ( hard rock )

* Underground mining ( hard rock )

In common with many other boroughs south of the Thames, Bexley has no London Underground lines or any other London based transport methods like London Tramlink, the Docklands Light Railway or London Overground.

The collapse had far-reaching consequences, since it also held up construction of the extended Jubilee Line of the London Underground, where contractors were using similar tunnelling methods.

Need for Speed: Underground 2 provides several new features, such as a broader customization, new methods of selecting races, the " explore " mode ( just driving around freely, like the Midnight Club series, in a large city known as " Bayview ").

Because deposits in sedimentary rocks are commonly layered and relatively less hard, the mining methods used differ from those used to mine deposits in igneous or metamorphic rocks ( see Underground mining ( hard rock )).

Underground comic strips covered subjects that are usually taboo in newspaper strips, such as sex and drugs.

The distinction is most easily made when there are two systems such as New York's subway and the LIRR and Metro-North, Paris ' RER and Métro, London's Overground and the tube lines of the Underground, Barcelona's Metro and Rodalies, S-Bahn and U-Bahn systems in Berlin, Frankfurt, Munich or Vienna, the JR lines and the Metro in Tokyo.

Oyster cards ( the ticket-free system for London Underground ) are now given with wallets sponsored by IKEA who also sponsor the tube map.

The escalators in Underground stations include some of the longest in Europe and all are custom-built.

Accidents on the Underground network, which carries around a billion passengers a year, are rare.

In this edition, the Regulars are a cell of the Underground, and like the other cells have highly compatible Quiets.

Some maps, for example the London Underground map, are topological maps.

There are some scheduled passenger services on their own privately managed, non-Network Rail lines, for example Heathrow Express which also partly runs on Network Rail and the London Underground also overlaps with Network Rail in places.

Through tickets involving Heathrow Express and London Underground are also available.

* 1981 – Two police officers and an armored car guard are killed during an armed robbery in Rockland County, NY, carried out by members of the Black Liberation Army and Weather Underground.

The London Underground and national rail network are the responsibility of the British Transport Police.

Underground water reservoirs that are mainly natural springs are tapped for both irrigation and drinking.

They are best known for their first album Becoming X ( released in 1996 ) and particularly the singles " 6 Underground ", " Spin Spin Sugar ", and " Tesko Suicide " from the same album.

These are accepted on the DLR, buses, railways, trams, the Underground and provides a discount on many river services fares.

The Underground Railroad fugitives ' stories are documented in the Underground Railroad Records.

Underground cables take up less right-of-way than overhead lines, have lower visibility, and are less affected by bad weather.

Underground lines are strictly limited by their thermal capacity, which permits less overload or re-rating than overhead lines.

The nearest London Underground stations are Oxford Circus, Piccadilly Circus, Tottenham Court Road, Leicester Square and Covent Garden.

Underground dams are used to trap groundwater and store all or most of it below the surface for extended use in a localized area.

Underground dams are typically constructed in areas where water resources are minimal and need to be efficiently stored, such as in deserts and on islands like the Fukuzato Dam in Okinawa, Japan.

Games are played by fans on Usenet, in diverse web forums, and on the London Underground itself.

The nearest London Underground stations are Holborn, Temple and Covent Garden.