Coal is solid black or black brownish in color mineral formed beneath the earth through sedimentation process from remains of death plants. Geologically it takes hundred million years for the coal formation and need of heavy expenditure for the extraction process since coal can be found several feet beneath the earth. Depth of the coal reserve determines the method of coal extraction. Surface mining method is more convenient if the reserve or coal seam is less than 200 feet beneath and underground mining method is opted if the reserve lies beyond 200 feet below the surface. Surface mining involves removing of shallow coal over a broad area where the land is fairly flat. Huge dragline shovels commonly remove rocks overlying the coal (called …show more content…
Surface mining can lead to the drastic changes of landscapes, destruction of habitat, damages to water supplies, and air pollution. Also the loss or degradation of forest further degrades groundwater because coal seams are often serve as underground aquifers, removal of coal beds may result in drastic changes in hydrology after mining has been completed. Moreover, surface mining causes green house gas emission since mountaintop removal releases large amounts of carbon through clear cutting and burning of trees. Beside, liquid coal known as sludge is generated by washing coal. It is typically disposed of at impoundments located near coal mines, but in some cases it is directly injected into abandoned underground mines. Since coal sludge contains toxins, leaks or spills can endanger underground and surface waters. The coal mining activities have exposed rocks containing the sulphur-bearing mineral pyrite. Pyrite reacts with air and water to form sulphuric acid and dissolved iron, and as water washes through mines, this compound forms a dilute acid, which can wash into nearby rivers and streams called Acid Mine Drainage (AMD). The transportation of coal is another issue because coal is often transported via trucks, railroads, and large cargo ships, which release air pollution such as soot and can lead to disasters that ruin the environment. (Environmental Impacts of
A machine known as a dragline then digs into the rock to reveal the coal, the machines hollow out the tiers of coal and dump millions of overburden, the previous mountaintops, into constricted nearby valleys, thereby producing valley fills. Coal companies have covered over 1,200 miles of biologically crucial Appalachian headwaters streams.
Roughly 68 percent of the electricity generated in the United States of America is produced by fossil fuels. That includes petroleum, natural gases and coal. Although coal contributes around 37 percent to the factor, it is by far not the cleanest of them all. Some might argue that it is good for the economy because it is cheap and it creates jobs.. But the other side of the story portrays coal mining as a process that kills thousands of coal miners a year and that it practically destroys the environment around the mining with soot and air pollution. Mining now days is a big part of urbanization; due to how cheap the process is. There are different ways that coal mining is done. Mainly mountain top removal is done but there are many other
Coal is one of the world’s most abundant fossil fuels. Coal was formed during the Carboniferous Period when dead plant material was buried and subjected to high pressure and heat. Coal is classified by moisture content and composition. There are four d...
Coal is considerably one of the most important sources of energy in nature and is one the most significant sources for power generation worldwide. The excavation and importance of coal became mainstream and apparent during the Industrial Revolution of the 19th and 20th centuries.
Taconite mining has become more popular ever since the rock has become rare. Taconite was once considered “waste rock,” but is currently really valuable. Since the Gogebic Iron Range has about three-fourths of all the taconite in the nation people from all over the country want to take over and start mining. Although taconite mining would do some good for the community, such as creating tons of jobs and boosting the economy for awhile, there are too many risks. Taconite mining has a negative effect on the environment and health.
Coal also can be very damaging to the environment. People in the coal industry don’t always follow the precautions needed for helping the recovering environment that coal mining hurt. Most of the time water is polluted from the byproduct the is produced while mining coal. Like acid mine drainage, air pollution from coal-fired power plants, coal dust, coal sludge, and mountaintop
The Intergovernmental Panel on Climate Change reports in their “Fourth Assessment Report” that coal derives half the electricity production in the U.S., with the U.S. exporting approximately six percent of the coal produced (Sims). Despite the positives, strip mining poses some serious consequences to the environment, portraying the industry in a negative light, some of which include deforestation and erosion, contamination of water, and wildlife poisoning and loss of habitat. Deforestation and erosion are the most obvious effects of strip mining. In order to get to the minerals beneath the surface of the earth, miners must clear-cut the area in which they will be working. According to the EPA, mountain top removal will affect 6.8% of forested land in the Appalachians (United States).
Open pit mining. It is also known as strip mining. It begins with the removal of soils on the surface and inefficient rock to get at the ore below. This is only possible in some cases, generally when the ore is less than 120 metres below the surface.
The process of mining involves the removal of non-renewable resources. There are two main types of mining, surface mining and underground mining. This practice has been ongoing since pre-historic times. In my research on mining, the process of taking out valuable materials from within the Earth that cannot be grown or made. Substances that are mined include; limestone, oil, gold and diamonds. The mined materials are used under the pretense to make life better. However, it is also used for consumerism such as diamonds to show a status or a symbol of wealth. The mined materials are driven by human demands and it is an economy within itself due to millions of dollars that it brings.
In her book Coal A Human History, Barbara Freese states "The mundane mineral that built our global economyand even today powers our electrical plantshas also caused death, disease, and environmental destruction" (front flap) Today, coal provides for more than 55% of the electricity generated in the U.S. (Cullen, Robert Vol.272) Coal miners have had one of the most dangerous jobs in history before government regulation. Many miners had to work underground for 10 + hours a day and 6 days a week(Cobb, James "Coal") The number of deaths per year is the equivalent of a Titanic going down in the nation's coal fields each year (Turkington, Carol) According to James Cobb from the World Book Online Reference Center mine safety involves four main types of problems including accidents involving machinery, roof and rib failures, accumulations of gases and concentrations of coal dust.
It is most commonly associated with coal mining, especially with soft coal, coal that has high sulphur content. The pyrite that is present in coal seams will be accessible after surface mining when the overlying surfaces are removed or in deep mines that allow oxygen access to the previously inaccessible pyrite-containing coal (D.E.P. 1, 1997). The. After pyrite is exposed to air and water, sulphuric acid and iron hydroxide are formed, creating an acidic runoff (D.E.P. 1, 1997; 2, 2002). When the water comes into contact with the pyrite, the chemical reactions that take place causes the water to increase in pH, which will dissolve heavy metals which stay in solution.
When coal gets burned they start to release harmful dangerous toxins such as mercury, lead and arsenic that will then escape into the air. It also releases large amounts of carbon dioxide (CO2) into the atmosphere. These emissions increase the greenhouse effect in the atmosphere and lead to global warming.
There are three types of fossil fuels- coal, crude oil, and natural gas. Coal was formed very slowly. Even the “newest” coal we use today was formed a million years ago. Most of the coal we use was formed 300 million years ago, when the Earth was covered with swamps. When plants and trees died, they sank to the bottoms of the swamps. These plants and trees were layered on top of each other, forming a substance called peat. Peat is considered the first stage in coal formation. It is a mixture of water, leaves, braches, and other plant debris. Over time, the Earth changed, and deposits of sand, clay, and other minerals were formed, burying the peat. Sedimentary rock...
When people think of geology, they usually think of rocks and fossils. However, geology is actually a very large field of study. The knowledge of geologists ranges from rocks and fossils to the moon and other planets (Hammonds 7-8). Geologists use a variety of subjects in their work, but the sciences and math are the most important. Some of the sciences geologists study are physics and chemistry (12). English is also a subject that geologists use when communicating with other scientists, the media, and the public (12) . Because of these tasks, it is important for geologists to have a wide knowledge of these different subjects.
In our days, mining for resources is inevitable. The resources we need are valuable in everyday life. Such resources mined up are coal, copper, gold, silver, and sand. However, mining poses environmental risks that can degrade the quality of soil and water, which can end up effecting us humans if not taken care of and many of the damages are irreversible once they have occurred.