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Mining

Mining for coal is something that is widely known, but did you know that diamonds, uranium, copper, and other non-renewable natural resources are also mined? There are two types of mining; surface and subsurface. Questions about the methods and types of mining, what ores are mined, and related questions should be asked in this category.

4,677 Questions

What mining technique is less harmful to the environment surface or subsurface mining?

Subsurface mining is generally considered less harmful to the environment compared to surface mining. Subsurface mining causes less land disturbance and produces less waste material on the surface. However, both mining techniques can have environmental impacts if not properly managed.

What are the benefits of surface mining over subsurface mining?

Surface mining is generally more cost-effective and less dangerous than subsurface mining. It also has a lower environmental impact as it causes less disturbance to the surrounding ecosystems. Additionally, surface mining allows for easier access to the mineral resources, making it more efficient.

How is soil categorized?

Soil is categorized based on its texture, which refers to the relative proportions of sand, silt, and clay particles it contains. Soils are classified as sand, silt, clay, or loam (a mixture of sand, silt, and clay). These categories help determine the soil's ability to retain water and nutrients, as well as its suitability for different types of plants.

What mining method is used to extract ore from beneath the earths surface?

The most common mining method used to extract ore from beneath the earth's surface is underground mining. This method involves creating tunnels and shafts to access the ore body underground, where miners extract the ore using various techniques. Underground mining can be more expensive and dangerous than surface mining but is necessary for accessing deep deposits of valuable minerals.

Why is mining bad for the world?

because if u dont repair ur work correctly it damages habitats and animals. mining also takes away natural resources we need to conserve. reclamation is the process in which u restore the land u mined on or destroyed

What is the angle of repose of iron ore?

The angle of repose of iron ore typically ranges from 30 to 45 degrees. This angle represents the steepest angle at which unconsolidated material can remain stable without sliding or collapsing. However, the exact angle can vary depending on factors such as the particle size and shape of the iron ore.

What is dirt or rock removed from its original location destroying the composition of the soil in the process as in trip mining derdging or construction called?

The process of removing dirt or rock from its original location, which destroys the composition of the soil, is called "excavation." This activity can disrupt natural ecosystems, create erosion problems, and lead to loss of habitat for plants and animals. Proper planning and mitigation measures are essential to minimize the environmental impact of excavation activities.

Does a compass work underground in a mine?

No, a compass may be unreliable underground in a mine due to interference from the surrounding metal ores and rock formations. Magnetic fields can be distorted and may cause the compass to give inaccurate readings. It is best to rely on other navigation tools in such environments.

How do you extract diamonds from the earth?

Diamonds are extracted from the Earth through mining processes such as open-pit mining or underground mining. Once the diamond-containing ore is mined, it is processed to separate the diamonds from the surrounding rock and soil. This typically involves crushing and sorting the ore to extract the diamonds.

What kind of mining would early prospectors use to extract shallow deposits of ore?

Early prospectors would use surface mining methods such as panning, placer mining, or open-pit mining to extract shallow deposits of ore. These methods involve manually removing the ore from the surface or near-surface layers of the earth without the need for extensive digging or tunneling.

What are the environmental factors affecting mineral resources?

Environmental factors affecting mineral resources include deforestation, water pollution, habitat destruction, and soil erosion. These factors can impact the availability and quality of mineral deposits, leading to challenges in extraction and utilization. Sustainable practices and conservation efforts are essential for minimizing the environmental impact on mineral resources.

Why it may be better to quarry limestone rather than granite or sandstone?

Limestone typically has a lower hardness and is easier to cut and shape compared to granite or sandstone. It also tends to be more readily available in many regions and is often less expensive to quarry. Additionally, limestone is a versatile material that can be used in a wide range of construction and architectural applications.

What are the disadvantages of strip mining?

Disadvantages of strip mining include habitat destruction, air and water pollution from mining operations, soil erosion, and disruption of local communities and ecosystems. It can also lead to long-term environmental impacts and the loss of biodiversity.

How did your ancestors extract iron?

The basic process to extract iron from ores is to oxidize the ore into iron oxides (such as FeO, Fe2O3, etc.). The iron oxides are melted and mixed with charcoal or coke (carbon from purified coal). The reaction for Fe(III)oxide is:

2Fe2O3 + 3C ---> 4Fe + 3CO2

Typically the molten product was pored into ingots known as pig iron.

Why is surface mining cheaper?

Surface mining is generally cheaper than underground mining because it involves removing material from the surface rather than having to dig deep underground. This makes it more accessible and requires less equipment and labor. Additionally, surface mining usually has higher production rates and allows for larger equipment to be used, further reducing costs per unit of material extracted.

Is iron ore scarce or plentiful?

Iron ore is considered to be plentiful on a global scale, as it is one of the most abundant metallic elements in the Earth's crust. However, the distribution of high-quality iron ore deposits can vary regionally, leading to some areas having more readily accessible deposits than others.

When did iron ore mines in the U.S. close down?

Iron ore mines in the U.S. have not completely closed down. Some have consolidated or scaled back production due to market conditions, environmental concerns, or depleted resources. The last major closure was the Empire Mine in Michigan in 2016.

What continent is famous for its diamond gold uranium and copper mining?

Africa is famous for its diamond, gold, uranium, and copper mining. Countries such as South Africa, Botswana, and the Democratic Republic of Congo are known for their rich mineral resources and extensive mining operations.

What is the compacted density of quarry dust?

The compacted density of quarry dust can vary depending on factors such as particle size, moisture content, and compaction method. On average, the compacted density of quarry dust is typically around 1500-2000 kg/m^3. It is recommended to conduct site-specific testing to determine the exact compacted density for a specific application.

How do you get aluminum from the ground?

Aluminum metal is too reactive chemically to occur as pure aluminum in nature. Instead, it is found combined in over 270 different minerals. The main ore from which aluminum is extracted is bauxite. Bauxite is usually strip mined because it is almost always found near the surface of the terrain, with little or no overburden. Approximately 95% of the world's bauxite production is processed first into alumina, and then into aluminium by electrolysis.

Bauxite is converted to alumina by first heating it in a pressure vessel along with a sodium hydroxide solution at a temperature of 150 to 200 °C. At these temperatures, the aluminum in the bauxite is dissolved as an aluminate (the Bayer process). After separation from the residual mud (from which most of the aluminum has already been extracted) by filtering, pure gibbsite is precipitated when the liquid is cooled, and then seeded with fine-grained aluminium hydroxide. The gibbsite is usually converted into alumina (aluminum oxide, Al2O3), by heating.

The alumina is then mixed with cryolite (Na3AlF6, sodium hexafluoroaluminate) and heated to about 1000 °C. The cryolite helps the alumina form a liquid solution. The aluminum is then separated by passing a lot of electricity through it (electrolysis). This separation is called the Hall--Héroult process after the men who developed it. Before the Hall--Héroult process was invented, producing aluminum was much more time consuming and expensive - to the point that aluminum dishes and utensils were considered more exotic and a mark of greater wealth than gold or silver dishes and utensils. Napoleon III, Emperor of France, is reputed to have given a banquet where the most honoured guests were given aluminum utensils, while the others made do with gold.

What is iron ore lumps and iron ore fines. What is the diference?

Iron ore lumps: size 10-40mm Iron ore fines: Granular size of up to 10 mm for up to 90% of the cargo. While lumps are crushed to 5-20mm size in crusher, normally 30% fines (waste) will be generated.

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What was a bucket used for in mining gold?

Buckets were used mainly during break times for interspecies realions between humans and trolls.

What is specific gravity of rocks?

Specific gravity of rocks is a measure of the density of a rock compared to the density of water. It is an important property in geology as it helps in identifying and classifying different types of rocks based on their specific gravity. The specific gravity of a rock can be used to infer its mineral composition and help determine its suitability for certain applications.

What minerals are mined in U.A.E?

Oil(Petroleum): UAE is mineral rich in Oil/Petroleum. Oil mines are an important part of the geology of UAE. Oil, which is the country's main source of generating economy, is found in mass quantities. The amount of oil produced in the UAE allows it to export the surplus to other countries.

What is the difference between 'quarrying' and 'mining?

Quarrying takes place at a quarry, a relatively small open pit mine where the usual product is dimension stone for construction or decorative purposes. Mining takes place at a mine, which may be of the open pit, surface, or underground variety, where the usual product is a valuable ore or coal, not normally dimension stone.