What is the main difference between open cast mining and shaft mining?

What is the main difference between open cast mining and shaft mining?

The deepest open pit mine is in theUSA and is 3900 feet deep. It is a copper mine. A shaft mine, also called a deep mine is where you dig holes (shafts) into the ground with branchesoff the shaft (drifts) to reach the coal or ore. The deepest shaft mine is 12,600 feet deep.

What is the difference between open cast mining and shaft mining Class 8?

Minerals can be extracted by mining, drilling or quarrying (Fig 3.3). Minerals that lie at shallow depths are taken out by removing the surface layer; this is known as open-cast mining. Deep bores, called shafts, have to be made to reach mineral deposits that lie at great depths. This is called shaft mining.

What is Open cast mining shaft mining?

Open-pit mining, also known as opencast mining, is a surface mining technique that extracts minerals from an open pit in the ground. Open-pit mining is the most common method used throughout the world for mineral mining and does not require extractive methods or tunnels.

What are the differences between open cast mining and underground mining?

The underground method is suitable for extraction of deeper coal seams, whereas opencast method is suitable for shallow coal seams. However, due to less production cost, mechanisation, and less wastage, opencast method dominates in India (93.26% of the total production in the financial year 2016-17).

Is quarrying open cast mining?

Open-pit mines that produce building materials and dimension stone are commonly referred to as “quarries.” Open-pit mines are typically enlarged until either the mineral resource is exhausted, or an increasing ratio of overburden to ore makes further mining uneconomic.

How is shaft mining done?

Shaft mining is the process where miners dig straight down, or almost straight down, until they reach their desired depth. Then the mine begins to branch out in all directions. Miners will enter or exit a mine through a lift or elevator installed where the initial vertical tunnel was originally.

What are the advantages of open cast mining?

Advantages of open-pit mining include:

• Powerful trucks and shovels can be used to move large volumes of rock.
• Equipment not restricted by the size of the opening you are working in.
• Faster production.
• Lower cost to mine means lower grades of ore are economic to mine.

Why is open cut mining better than underground mining?

After the mineral deposits have been exposed, the area is drilled, fractured and the mineral extracted. This method has a high recovery rate when compared to the underground, as 90 percent of mineral deposits are recovered. Overall when compared to other methods, open-cut is much safer.

Why is open-pit mining cheaper?

Open-pit mining occurs on surface and is generally the cheapest way to extract ore. This is because rock doesn’t have to be moved far up hill against gravity, equipment used can be larger than underground, and it doesn’t require more expensive features like ventilation, communications, etc.

What’s the difference between open pit and open cast mining?

Open cast mining is the removal of rocks or sediments that contains minerals, with economically important elements. Have you ever wondered what extraordinary materials are extracted from the open pit mining? • Diamonds – are known for their durability & lustre.

Which is easier opencast mining or underground mining?

Opencast Mining or quarrying of minerals is easier than mining by underground methods. During Quarrying the alluvium and rocks below which the minerals lie,are removed and dumped,in the initial stages, in a place which is not required for quarrying ,residential or other purposes.The mineral exposed is completely extracted.

What is the difference between open cast and quarrying?

What is the difference between open cast mining and quarrying? Used where commercially useful minerals are found near the surface. Employed to extract almost all types of minerals and coal. Used for extracting building materials like stone and limestone.