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rocks and minerals are easy to find and extract when they outcrop on or near the Earth's surface. All that needs to be done id to clear the vegetation and soil from the surface and start digging. Such mining is called open cast mining. deep mining involves sinking a vertical shaft down to the rock layer containing minerals, making a horizontal tunnel following the mineral layer, extracting the minerals by digging done by machines and miners, bringing the loose rock from the mine and piling it up on waste heaps on the surface and transporting the minerals. deep mining is more dangerous than open cast as miners work underground while in open cast workers work on the surface.
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What do you mean by opencast mining?
open cast mining is...
What is the opposite of opencast mining?
closecast.
Why opencast mining is cheaper for companies?
because opencast mining doesnt require shafts and tunnels to be built unlike other approaches such as deep mining. it is on the surface so transportation costs from underground to ground level do not exist. insurance costs for miners may be lower as there is no risk of the mine 'caving in'.
How do you mine coal?
Coal is mined by two methods: surface or 'opencast' mining or underground or 'deep' mining.The choice of mining method largely depends on the geology of the coal deposit. Underground mining currently accounts for a bigger share of world coal production than opencast; although in several important coal producing countries surface mining is more common.
What is a method of mining that involves excavating from the surface?
OPENCAST
What are two ways to mine coal?
Coal is mined by two methods: surface or 'opencast' mining or underground or 'deep' mining.The choice of mining method largely depends on the geology of the coal deposit. Underground mining currently accounts for a bigger share of world coal production than opencast; although in several important coal producing countries surface mining is more common.
What is the difference between opencast mining and shaft mining?
in open cast miniing the earth surface is simly dug out to take minerals which are shallow.in shaft mining we should put bores to take minerals which are deep under the earth
What is opencast mining?
open cast minng involves the digging out of minerals that occur on the surface of the earth
What has the author WDavid Evans written?
W.David Evans has written: 'The Geology and Opencast Mining of the Jurassic Ironstones of Great Britain'
What is deep lead mining?
Deep lead mining is a form of underground mining. Deep leads are old riverbeds that have become buried.
Is pollution an example of chemical weathering?
Pollution is usually caused by human activities - industrial waste, mining and opencast, household waste, and so on.
Where is the largest open cast mine in the world?
One of the largest excavations in the world has been made by opencast mining at the Bingham Canyon copper mine in Utah, USA, measuring 790 m/2,590 ft deep and 3.7 km/2.3 mi across.
