Overburden ratio

What is Overburden ratio?

Overburden ratio meaning Overburden ratio refers to the amount of overburden that must be removed to excavate a given quantity of coal. It is commonly expressed in cubic yards per ton of coal, but is sometimes expressed as a ratio comparing the thickness of the overburden with the thickness of the coalbed.

 

reference: Glossary – U.S. Energy Information Administration (EIA)

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