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Because there is no roof to support in an open cut whereas in underground mining there may be a very large overburden load leading to very high stresses in the tunnel roof. This may require support and there is the potential for a roof collapse to occur.
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What is a method for uranium mining?
Uranium mining can be either by open pit mining or by underground mining.
Disadvantages of Open-pit mining?
Open cast mining is generally considered safer than underground mining but there are still some dangers such as: 1)Because opencast mining is done in the form of ledges one can easily fall off one of these ledges which can can meters high. 2)Because open pit mining is done using explosives it can cause injury due to flying pieces of rock and other debris. 3)Open cast mining needs a lot of space for digging and it affects the environment in many bad ways.Animals loose their homes,deforestation occurs,people have to be relocated to other places because of pollution hazards. 4)The use of explosives may also cause other accidents to happen.
How is surface and underground mining different?
Surface mining is used where the ore or material to be extracted is located fairly close to the surface. The overlying ground cover is removed, the material is mined, and the ground cover is ordinarily replaced. Subsurface mining is used where the material is in veins deep beneath the surface, or obstructed (by rock layers, water tables, or other strata) in a way that make surface access impractical. Early mines used existing caves, but technology has brought increasingly deep and complex drilling to reach veins of coal or metal ores.Surface MiningSafer and easier than subsurface mining.Does more damage to the surface ecosystems than subsurfaceCreates more of a mess than subsurface or open cut mining.Subsurface MiningNot as much widespread damage to ecosystemsDifficult and expensive to digVery dangerous conditions can include collapses, released gases, particulates in the air, low oxygen, and heat
A mining process in which rock is stripped away to expose mineral deposits near the surface is?
Strip, surface or open cast mining.
Is uranium more commonly mined world wide using the In Situ Leaching method or the conventional mining method?
The open pit mining or the underground mining are more common now.
What type of mining done in Bolivia?
Open pit and under ground.
Is open cut mining safer compared to underground mining?
Yes.
Is open pit mining safer than underground mining?
it is, because if underground the mine can cave in.
What are two reasons why open-pit mines are more common in western Canada than underground mines?
Open pit mining is used when the materials being mined are closer to the surface. It is safer to do open pit mining than it is to do underground mining. Underground mining is only used for mining hard minerals.
What type of mining is used to extract veins of ore deposits from the ground?
Open Pit Mining
What type of mining would most likely be used if a resource is concentrated in deep pockets in ground that is safe for tunneling?
Open Pit Mining
What is the difference between strip mining and open pit mining?
1.Depth:strip mining is done for <60 m while open pit is done for>60 to near about 120 m. 2.Design:Strip mining is done maintaining spoil & piles system while open pit has a specific mining structure to follow. 3.Environment:strip mining is normally done for dry area while for open pit mining we have to lower the ground water level.
What is deep mining?
Deep mining of any kind is done in tunnels leading off a vertical shaft into the ground, as opposed to 'open pit' or 'strip' mining. Deep mining is principally done for copper.
What is the difference of surface mining and subsurface mining?
Surface mining is safer and easier than subsurface mining.Surface mining does more damage to the environment than subsurface.Surface mining creates more of a mess then subsurface or open cut mining.ON TH OTHER HAND-Subsurface mining is very dangerous.Subsurface mining allows you to retreive minerals from underground.Subsurface mining requires you to go underground, where you will have very little air.
Is open mining or closed mining more expensive?
Open-pit mining is generally less expensive in terms of exploration, development, equipment and operation. Typically, when a recovery operation is developed as an open-pit mine, the valuable mineral deposit is closer to the surface. Also, because it is open-pit, the scale of economy applies, meaning that larger equipment can be used, thus lowering the per-unit cost of operation. In addition, while underground mines must leave behind some of the target minerals in order to provide support for the mine structure, open-pit mines do not. It should be noted that while open-pit mining is generally the less expensive mining method. that will not always the case. This is due the geology. The nature of the ore body, and the depth and angle of the deposit will enter into cost considerations when choosing a mining method. It can also depend on the rehabilitation requirements as with open pit mining you are left with huge holes in the ground and with under ground/closed mining you simply have a small entry to close with mining is finished.
What is an open cut mining different to an underground mining?
it is open not underground (it has no roof)
What are advatages of open pit mining?
Open pit mining may be used when very large quantities of material are mined, such as gold mining, copper ore, etc. It permits removal of a much greater amount of material (underground coal mines typically extracted only about 30% of the coal in the area mined). Where overburden is not too great, it may be much less expensive than underground mining, and it is typically much safer.
