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One example of an unsupported mining method is Room-and-Pillar mining. This method involves timber beam supports to hold up the cave in which the mining is taking place. Another example involves using the mineral, such as coal, to hold up the walls. Pillars of the mineral are left in the mine as supports. This method allows for less of the mineral to be collected, because it is being used for the actual support of the mine.
Correction
Simply put, unsupported mining refers to the use of the grounds natural rock strength and the principals of ground control techniques to extract ore (with some waste) from the ground. There are two types of mining, surface and underground. The term support generally refers to the application of timbers, concrete, shotcrete, rock bolts, rock cables, screens, etc and a combination of these.
Unsupported mining on surface is carried out successfully by designing pits with slopes that are at such an angle that the walls will not collapse during the extraction process. The ideal slopes have safety factors that are greater than 1.0. The ideal open pit mine would be one that would stand in place until all the economic material was removed, after which failing or slumping.
Unsupported mining under the ground (u/g) is carried out successfully by designing openings either drifts, cross cuts, stopes, raises and other that are of the size and shape that they do not fail or "cave". Generally hard, competent rock that is not highly fractured, faulted, or jointed will lend itself to unsupported mining techniques u/g. Rocks that can be mined with the use of ground controlling tools or devices can generally be mined by a few different methods, room and pillar, longwall stoping, sublevel stoping, and block caving.
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What type of mining is used when mining for ruby?
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What is trackless mining?
mining which machinery is used. LHD,DRILL RIGS,DUMO TRUCKS...MOBILE MACHINERY FORMS MAJOR PART OF THIS TYPE OF MINING
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What are the three gold mining methods?
Gold is recovered by three basic mining methods: placer mining of alluvial deposits, lode or vein mining, and recovery as a by-product of base-metal mining.
What are the surface and subsurface methods by which coal is commonly mined?
Surface mining methods for coal include strip mining, open-pit mining, and mountaintop removal. Subsurface mining methods involve underground mining techniques such as room and pillar mining, longwall mining, and shaft mining. Each method has its own advantages and challenges in extracting coal from the earth.
What are some surface mining methods?
Some surface mining methods include open-pit mining, strip mining, mountaintop removal mining, and placer mining. These methods involve removing the overlying material to access the desired mineral deposits near the surface. Surface mining is often used for coal, metals, and other minerals that are located close to the Earth's surface.
How did the methods of early miners and those mining company owners differ?
mining
Mining methods for detrital and residual clay?
Strip mining is the most common method.
What are some early gold mining methods?
panning,shaft mining,cradling and puddling
What methods are used to find Gold?
Gold is typically found through mining methods such as placer mining, hard rock mining, and hydraulic mining. These methods involve extracting gold-bearing ore from the earth and then processing it to extract the gold. Modern methods also include using advanced technologies such as satellite imagery and geochemical analysis to locate potential gold deposits.
What methods do you use for mining?
their is Panning,cradling,shaft mining,dry blowing,Puddling and dredging!!
What are the examples of gold mining accident?
structure collapse unsupported shafts collateral damage Mining accidents can be caused by eaks of poisonous gases such as hydrogen sulfide or explosive natural gases, especially firedamp or methane, dust explosions, collapsing of mine stopes, mining-induced seismicity, flooding, or general mechanical errors from improperly used or malfunctioning mining equipment (such as safety lamps or electrical equipment). Use of improper explosives underground can also cause methane and coal-dust explosions.
What are the two methods used for mining coal?
The two methods used for mining coal are surface mining and underground mining. Surface mining involves removing layers of soil and rock to access coal deposits near the surface, while underground mining involves tunneling underground to extract coal from deeper deposits.
What mining methods are used for aluminium?
Due to the low value of bauxite, mining is usually strip mined
If a mineral deposit is located deep within the earth what mining methods are used to mind the deposit?
For deep mineral deposits, underground mining methods such as shaft mining, drift mining, and slope mining are typically used. These methods involve creating shafts and tunnels to access the deposit, allowing miners to extract the minerals from underground. Specialized equipment and safety measures are employed in underground mining to ensure the safety of workers and the efficiency of mineral extraction.
