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Tunnel ventilation shafts in metro stations are crucial for maintaining air quality and regulating temperature within the tunnels. These shafts facilitate the intake of fresh air and the expulsion of stale air, ensuring a safe and comfortable environment for passengers and train operations. They also play a vital role in smoke control during emergencies, helping to direct smoke away from the platforms and train areas. Proper design and maintenance of these shafts are essential for the overall efficiency and safety of metro systems.
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What is an air shaft?
An air shaft is a vertical shaft which supplies ventilation to a tunnel or underground facility.
How was the mount MacDonald tunnel built?
The tunnel was built under two contracts. One contractor used conventional drill and blast to excavate the entire 40 ft. high by 20 ft. wide tunnel profile, working from the west portal. The east portal contractor excavated a +or- 20 ft. diameter top heading with a tunnel boring machine and then used drill and blast to remove the remaining "bench". The tunnel was lined with concrete after excavation was complete. A third contractor built the ventilation shaft. The tunnel uses a unique ventilation system that consists of the shaft, a tail tunnel connecting the shaft to the main tunnel and doors at either end of the tunnel and near the vent shaft tail tunnel. The doors open and close so as to push exhaust out the vent shaft or pull fresh air from the vent shaft into the tunnel, depending on the position of the train in the tunnel. The tunnel was built to reduce the grade for westbound coal trains. This reduced the need for up to nine additional locomotives to push the coal trains up the steeper grade of the Connaught Tunnel.
What is a horizontal mine shaft called?
A horizontal mine shaft is called an adit. It is a passage or tunnel that connects the surface with underground mine workings for access, ventilation, and transportation of materials.
What is a mine ventilation shaft called?
Intake
Girl crushed in elevator shaft in Chicago at the metro club?
NO
What is a mine shaft?
Shaft mining or shaft sinking refers to the method of excavating a vertical or near-vertical tunnel from the top down, where there is initially no access to the bottom.
What is some mining equipment for shaft mining?
Shaft mining is the earnest form of underground mining. Underground mining is selected when the rock or mineral is so far to reach using surface mining. Shaft mining is the kind of mine that you normally see in movies where the miner travels straight down into a profound, dark tunnel until he reaches the base. The shaft mine has a vertical man shaft, a tunnel where the men travel up and down in an elevator. Equipment is taken into the mine using this shaft, too. Short tunnels to the ore are dug from that man shaft. When the ore is dynamited and broken into chunks, it is taken to the top and loaded into trucks through a second shaft. There is usually an air shaft that gives the mine ventilation. When we visited a coal mine, it was amazing how much air moved around in the tunnels. Moving air removes the gases that occur naturally underground.
What is headrace tunnel?
A tunnel between De-silting basin or Fore-bay to Surge Shaft is called Head Race tunnel which may have pressure flow or gravity flow.
What do you call a vertical tunnel in a cave system?
A vertical tunnel in a cave system is called a "shaft." These shafts can be naturally formed due to erosion or underground water flow, or they can be the result of human excavation for exploration or mining purposes.
How do you find where the ventilation shaft leads to in Game Show Island?
it leads to the door on the outside of the club
What is the difference between a drift and slope mine?
Drift mines are characterized by the use of a level tunnel leading into the mine, while slope mines have an inclined tunnel, and shaft mines utilize a vertical tunnel
Where is the vent shaft on carrot island on poptropica?
In The tunnel leading the processing room (find on map ;) )
