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Possible Answers:
PIT.
Last seen on: The Telegraph – QUICK CROSSWORD NO: 29,324 – Mar 30 2020
Random information on the term “Coalmine”:
Longwall mining is a form of underground coal mining where a long wall of coal is mined in a single slice (typically 0.6–1.0 m (2 ft 0 in–3 ft 3 in) thick). The longwall panel (the block of coal that is being mined) is typically 3–4 km (1.9–2.5 mi) long and 250–400 m (820–1,310 ft) wide.
The basic idea of longwall mining was developed in England in the late 17th century. Miners undercut the coal along the width of the coal face, removing coal as it fell, and used wooden props to control the fall of the roof behind the face. This was known as the Shropshire method of mining. While the technology has changed considerably, the basic idea remains the same, to remove essentially all of the coal from a broad coal face and allow the roof and overlying rock to collapse into the void behind, while maintaining a safe working space along the face for the miners.
Starting around 1900, mechanization was applied to this method. By 1940, some referred to longwall mining as “the conveyor method” of mining, after the most prominent piece of machinery involved. Unlike earlier longwall mining, the use of a conveyor belt parallel to the coal face forced the face to be developed along a straight line. The only other machinery used was an electric cutter to undercut the coal face and electric drills for blasting to drop the face. Once dropped, manual labor was used to load coal on to the conveyor parallel to the face and to place wooden roof props to control the fall of the roof.
Random information on the term “PIT”:
Allegiant Air (usually shortened to Allegiant and stylized as allegiant) is an American low-cost airline that operates scheduled and charter flights. As a major air carrier, it is the ninth-largest commercial airline in the US. It is wholly owned by Allegiant Travel Company, a publicly traded company with 4,000 employees and over US$2.6 billion market capitalization. The corporate headquarters are in Summerlin, Nevada, a suburb of Las Vegas.
Allegiant Air was founded in January 1997 by Mitch Allee (owner, CEO), Jim Patterson (president) and Dave Beadle (chief pilot), under the name WestJet Express. After losing a trademark dispute with West Jet Air Center of Rapid City, South Dakota, and recognizing the name’s similarity to WestJet Airlines of Canada, the airline adopted the name Allegiant Air and received FAA and US DOT certification for scheduled and charter domestic operations on June 19, 1998. The airline also has authority for charter service to Canada and Mexico.