DISADVANTAGES OF UNDERGROUND MINING Underground mining accounts for only about 15 percent of the metallic and nonmetallic ore (excluding coal, sand and gravel, and stone) produced in the United States (E/MJ June 1977, ). Obviou~ly, in cases where both surface and underground mining are physically applicable, surface mining is the favored method.
Open pit, open cast or open cut mining is a surface mining technique of extracting rock or . Leftover waste from processing the ore is called tailings, and is generally in the form of a slurry. This is pumped to a tailings dam or settling pond,. ... advantages and disadvantages on open cast ore dressing.
Apr 24, 2013· In the last 12 months mining has been under attack like never before. But, unlike many of my other editor's comments that focus on the apparent .
Mar 13, 2012· Basics of openpit mining. Disadvantages of opencast mining •Work is affected by weather. •Land degradation by mining. •Deforestation. •Pollution ( water, Air, Land, Noise ). •The method is uneconomic for workings Deeper Depths, cities and under sea/rivers. •The quarried area and OB dump heaps present an unpleasant sight.
Apr 12, 2009· Advantages: 1)Mining of ores will enable people to get useful elements with significant profit. 2)Mining will give unemployed people to get at least the simplest job. 3)Mining of ores might result in finding something new and valuable (since we are digging) Disadvantages: 1)Since mining sites are usually in the forest areas, trees will be cut while people are getting to these places. 2)Workers might .
Open Pit Mining Pros Cons | eHow. Open pit mining or strip mining is an extraction process for ore or fossil fuels that takes ... One of the major benefits to open pit mining is the increase in efficiency over deepshaft mining techniques. .... The Disadvantages of Drilling for Oil. More details » Get Price
Apr 12, 2009· 3)Mining of ores might result in finding something new and valuable (since we are digging) Disadvantages: 1)Since mining sites are usually in the forest areas, trees will be cut while people are getting to these places. 2)Workers might die due to accidents.
Surface mining is safer and easier than subsurface mining. Surface mining does more damage to the environment than subsurface. Surface mining creates more of .
Open Pit Mining Openpit mining, also known as opencast mining and opencut mining, refers to a method of extracting rock or minerals from the earth by their removal from an open pit or barrow. The term is used to differentiate this form of mining from extractive methods that require tunneling into the earth.
Advantages and disadvantages of open pit mining What is open pit mining . Open pit mines are those mining operations that take place on the surface,unlike the underground mines.
Open pit mining is also called strip mining because the extraction process destroys vegetation, reduces habitats and pollutes the environment. Mining proponents argue that the process is more efficient, cost effective and safer than shaft mining.
What are the advantages and disadvantages of surface mining. The advantages of surface mining are: It is cheaper to extract the ore or metal than underground mining; Less .
Mining with a CPU has its advantages and disadvantages. Let's examine these in order to understand better if and when it is appropriate to use your CPUs to mine Bitcoin. As you may recall in the beginning, everyone used a CPU to mine for bitcoins.
ENVIRONMENTAL IMPACT OF MINING IN THE RAINFOREST. Largescale mining operations, especially those using openpit mining techniques, can result in significant deforestation through forest clearing and the construction of roads which open remote forest areas to transient settlers, land speculators, and smallscale miners.
Aug 26, 2008· Mining is widely regarded as having adverse effects on environment of both magnitude and diversity. Some of these effects include erosion, formation of sinkhole, biodiversity loss and contamination of groundwater by chemical from the mining process in .
Open pit mining does offer some advantages over traditional deep shaft mining. Pit mining is more cost effective than shaft mining because more ore can be extracted and more quickly. The working conditions are safer for the miners because there is no risk of cave in or toxic gas.