This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: Describe the coal reserves of the United States. What will be an ideal ... (Read 72 times)

washai

  • Hero Member
  • *****
  • Posts: 523
on: Jul 21, 2018
Describe the coal reserves of the United States.
 
  What will be an ideal response?

Question 2

Outline some of the major differences in the ways coal is mined.
 
  What will be an ideal response?


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

jazzlynnnnn

  • Sr. Member
  • ****
  • Posts: 335
Reply #1 on: Jul 21, 2018
Answer to Question 1

The EIA estimates that there is 486 billion tons of coal in known deposits in the United States. That should be
enough to last hundreds of years at current rates of consumption. The United States has the largest known coal
reserves in the world.



Answer to Question 2

Coal near the surface is mined in what is often referred to as open pit or strip mines. In open pit mining, the
overburden (surface covering of earth) is removed and stored aside; the coal is removed; and the site is restored
using the overburden. Coal in deeper deposits is taken from underground mines. There are three main types of underground mines: shaft mines, slope mines, and drift mines. Shaft mines use vertical tunnels to gain access to
deeper coal deposits. Slope mines use tunnels that slope down more gently from the surface to the coal deposits.
Drift mines involve tunnels cut into the sides of mountains.



washai

  • Member
  • Posts: 523
Reply 2 on: Jul 21, 2018
Great answer, keep it coming :)

marict

  • Member
  • Posts: 304
Reply 3 on: Yesterday
Gracias!

« previous next »
 

Did you know?

Drug abusers experience the following scenario: The pleasure given by their drug (or drugs) of choice is so strong that it is difficult to eradicate even after years of staying away from the substances involved. Certain triggers may cause a drug abuser to relapse. Research shows that long-term drug abuse results in significant changes in brain function that persist long after an individual stops using drugs. It is most important to realize that the same is true of not just illegal substances but alcohol and tobacco as well.

Did you know?

Fewer than 10% of babies are born on their exact due dates, 50% are born within 1 week of the due date, and 90% are born within 2 weeks of the date.

Did you know?

Alcohol acts as a diuretic. Eight ounces of water is needed to metabolize just 1 ounce of alcohol.

Did you know?

Critical care patients are twice as likely to receive the wrong medication. Of these errors, 20% are life-threatening, and 42% require additional life-sustaining treatments.

Did you know?

In 2006, a generic antinausea drug named ondansetron was approved. It is used to stop nausea and vomiting associated with surgery, chemotherapy, and radiation therapy.

Diversity in the United States Diversity in the United States
Occupational Prestige: How The United States Compares With Sixty Countries Occupational Prestige: How The United States Compares With Sixty Countries
Total Fertility Rate in the United States, 1860–2008 Total Fertility Rate in the United States, 1860–2008
GDP per Capita in the United States, 1870–2009 (Ratio Scale) GDP per Capita in the United States, 1870–2009 (Ratio Scale)
Fraction of obese individuals by state in 1998 and 2008. In 1998, 42 states had obesity rates below Fraction of obese individuals by state in 1998 and 2008. In 1998, 42 states had obesity rates below
Prevalence rates of obesity in the United States, 2014 Prevalence rates of obesity in the United States, 2014
Video: Natural Selection, Species Isolation and Real World Example

For a complete list of videos, visit our video library