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http://coaleducation.org/q&a/10_reasons_why_coal.htm
Coal can be mined and burned with little environmental impact. There has been tremendous strides in environmental responsibility with mining coal and burning coal. However, there still is pressure of global warming.
https://www.ran.org/why_we_need_to_quit_coal/
At every stage of its life — from extraction to burning — coal does serious damage. Coal is the top contributor to climate change, is a leading cause of mercury pollution, and continues to scar mining communities in countless ways. Coal also threatens our economic security.
https://homeguides.sfgate.com/positives-negatives-coal-energy-sources-78729.html
Coal forms from organic material that decays and experiences pressure and heat for millions of years. Since they take so long to form, fossil fuels like coal and oil are nonrenewable. The process to generate energy from coal involves mining the coal, then transporting, cleaning and burning it.
https://www.iea-coal.org/commonly-used-mining-techniques-to-extract-coal/
Coal also serves as fuel in the extraction of iron from iron ore and for the production of cement. Due to a rise in demand for coal, many mining techniques have evolved to extract the fossil fuel. A large-scale mining of coal requires the use of draglines, trucks, conveyors, hydraulic jacks and shearers.
https://pghenvironmental.wordpress.com/2014/04/22/why-should-we-continue-to-use-coal-as-an-energy-resource/
Apr 22, 2014 · why should we continue to use coal as an energy resource? In the world today, there are many talks of the use of natural resources in our everyday life. There are four major natural resources we use for energy; clean coal, solar photovoltaics, natural gas, and nuclear energy.
https://www.bettermeetsreality.com/top-reasons-why-coal-is-bad-problems-with-using-coal-as-an-energy-source/
Jul 07, 2019 · Some of the main reasons the use of coal as an energy source might be bad now and heading into the future are: Coal is generally (across several different measures) regarded as one of the most dangerous and harmful energy sources. Air contaminants emitted by the burning of coal contributing to air pollution.
https://www.britannica.com/technology/coal-mining/Underground-mining
Often the extraction of coal from the seam during mine development is called “first mining”; the extraction of the remaining seam is called “second mining.” Mining methods Modern underground coal-mining methods can be classified into four distinct categories: room-and-pillar , …
http://emfi.mines.edu/emfi2011/Coal%20Mining%20Methods%20-%20EMFI%20Summary.pdf
that could interfere with continuous coal extraction. The mine floor must provide a firm base for the moveable roof supports used in longwall mining. Large aquifers should not overlie the coalbed. Oil and gas wells that penetrate the mine are problematic, because pillars of coal …
https://www.eia.gov/energyexplained/coal/coal-and-the-environment.php
Nov 01, 2019 · Coal is an abundant fuel source that is relatively inexpensive to produce and convert to useful energy. However, producing and using coal affects the environment. Effects of coal mining. Surface mines (sometimes called strip mines) were the source of about 63% of the coal mined
http://www.undergroundcoal.com.au/fundamentals/06_overview.aspx
In such cases, pillars may be extracted by methods using continuous miners. There are several methods of secondary extraction employing continuous miners, all of which involve splitting the pillars or blocks formed by first workings using minimal (but adequate) short term supports and/or mining a series of short, unsupported "lifts" off long "splits" that are driven with the continuous miner. The …
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