What is a headframe used for?

A headframe (also known as a gallows frame, winding tower, hoist frame, pit frame, shafthead frame, headgear, headstock or poppethead) is the structural frame above an underground mine shaft so as to enable the hoisting of machinery, personnel, or materials.

How does a headframe work?

Cables from a mine’s hoist house passed over sheave wheels at the top of the frame, lowering miners to their work, transporting mules, equipment and supplies down the shafts and most importantly, bringing up load after load of ore.

Why do the legs on a head frame?

The left “legs” of the head frame slope towards the hoist. This is due to the tension in the cable pulling the whole frame in that direction. The sloping legs prevent the head frame from toppling or falling over.

What Is a Winding house of a mine?

For those who are not aware: a winding house is where the wind for the mine elevator is located, typically a steel rope operated by a steam engine or later by an electric engine. In this case it is the original steam powered Victorian winding engine of the abandoned Elliot Colliery .

What are the difference between the two mine winches shown here?

So what are the differences between the two? The biggest difference is that a hoist is designed to both lift and lower a load, whereas a winch is designed to pull a load – and depending on design, hold it in place.

What do you call the two parts of lift that goes down a mine?

Answer: The sheave wheel is a pulley wheel that sits above the mine shaft. The hoist cable passes over the sheave wheel and then down the shaft of the mine.

What are the two parts of lift that go down a mine?

Answer: The sheave wheel is a pulley wheel that sits above the mine shaft. The hoist cable passes over the sheave wheel and then down the shaft of the mine. The sheave wheel reduces the sliding friction of the mine cable.

What does it mean when a woman sits with her legs open facing you?

Sitting with slightly open legs is a relaxed position, showing the person is comfortable. Sitting allows a wider opening of the legs and can thus be even more of a sexual ‘crotch display’. If the person is a bit worried about this, then their hands may cover the genitals.

Why do guys stand with their legs apart?

When a man uses this legs-apart stance, it often signifies dominance, as it highlights the pelvic area. It allows men to highlight their masculinity and show solidarity as a team by all performing the same actions. So, if you want a confidence boost, or just to appear confident, use this stance.

What is the difference between two mine winches?

What does Colliery mean?

coal mine
: a coal mine and its connected buildings.

What are two parts of lift that go down a mine called?

Which is the best definition of headframe?

Definition of headframe. : a frame structure over a mine shaft to support the hoisting sheaves. — called also gallows.

What can you do with a steel headframe?

Upon mine closure and mine reclamation a steel headframe is easier to demolish and may have value as scrap metal.

What kind of material is a head frame made of?

Headframes can potentially be made from steel, timber or concrete but modern technical requirements have made wood almost obsolete.A comparison of steel and concrete structures can be found below. Dead load is the headframe, sheave wheels, conveyances and their contents.

Which is the oldest headframe in the world?

For the frame of a gallows, see Gallows. Steel headframe of Ottiliae shaft (1876) in Clausthal-Zellerfeld. It is the oldest existing headframe in Germany.

Definition of headframe. : a frame structure over a mine shaft to support the hoisting sheaves. — called also gallows.

Upon mine closure and mine reclamation a steel headframe is easier to demolish and may have value as scrap metal.

How big are the shafts on the headframe?

The joint venture’s shaft contract, following a 45 m presink, is to sink to a depth of 1,090 m at a 6.4 m diameter, construct the headframe, 14 off-shaft station excavations and rock loading facilities and two 180 m deep ventilation shafts. Buly off to a good start. (Panorama)

What do you call the frame at the top of a shaft?

The frame at the top of a shaft, on which is mounted the hoisting pulley. Also known as gallows; gallows frame; headstock; hoist frame. The shaft frame, sheaves, hoisting arrangements, dumping gear, and connected works at the top of a shaft. Also known as headgear. The following article is from The Great Soviet Encyclopedia (1979).

What does the two parts of the lift do?

Part 2: The sheave wheel is a pulley wheel that sits above the mine shaft. The hoist cable passes over the sheave wheel and then down the shaft of the mine. The sheave wheel reduces the sliding friction of the mine cable. Part 3: The head frame is the structure that supports the sheave wheel.

What are the differences between the two mine winches?

Do you think I beams are a good thing to use for head frame supports Why?

The shape of I beams makes them excellent for unidirectional bending parallel to the web. The horizontal flanges resist the bending movement, while the web resists the shear stress. They are also cost effective, since the “I” shape is an economic design that doesn’t use excess steel.

Do you think I beams are good thing to use for head frame support Why?

I beams are the choice shape for structural steel builds because of their high functionality. The shape of I beams makes them excellent for unidirectional bending parallel to the web. The horizontal flanges resist the bending movement, while the web resists the shear stress.

The biggest difference is that a hoist is designed to both lift and lower a load, whereas a winch is designed to pull a load – and depending on design, hold it in place. Winches generally do not have a brake that is adequate to absorb the energy created when a load is being lowered.

What is the difference between the two mine winches?

How fast must the cage and skip travel?

This distance is as little as 40 cm, and the conveyances travel at a speed of 55 km/h. The skip, cage and the 33-tonne counterweight are of ABB´s well proven design. The skip, with a payload capacity of 21.5 tonnes, is designed to ensure fast, automatic loading and dumping.

What’s the difference between a winch and a hoist?

A winch is designed to pull a heavy load horizontally over a slightly inclined or level surface, and a hoist is designed to lift a load vertically over steeper inclines that are greater than 45 degrees.

What is the strongest beam shape?

I-Beam. . . . is the quintessential beam profile. The design is super strong in the vertical direction, yet has a uniform and equal response to other forces. It has the best strength to weight ratio (vertical) making it a great DIY beam profile — for Cranes, and for the main beams of big and/or long trailers.

Why is an I-beam stronger?

The I-beam is much stronger by weight because it distributes a load through the webbing of the beam and is built to distribute a vertical load.

Why is an I-beam shaped as it is?

So, our I beams are the shape of an I because that shape has the most efficient use of material for performing the desired structural purpose while also being the easiest to work with.

How does a mine shaft work?

A mine shaft is a is a vertical access hole that is several meters in diameter and stretches down to the location of the ore. It is where miners, supplies, equipment, water and air are conveyed to gain access to the ore. Ore is conveyed to the surface through mine skips that move up and down the shaft.

What is a colliery spoil tip?

A spoil tip is a pile of waste rock and soil removed during coal mining. By 1916 the colliery had run out of space to tip the waste on the valley floor and began tipping on the mountainside above the village of Aberfan.

What is a colliery overman?

Overman. The overman is a deputy to the viewer and involved more directly with the daily work of the pit. When a colliery has a number of pits under a viewer, there is an overman to each pit.

Can I use a winch as a hoist?

Can a winch be used as a hoist? Generally speaking, no. It is not safe to use a standard winch to lift loads up off the ground, as it wasn’t designed for this purpose and there is a risk that the load will be dropped. One of the key differences between winches and hoists lies in their braking systems.

How much can a 2000 lb winch lift?

Trailer Winch Capacity