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From which of the mining technique lignite can be extracted?

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in Engineering Chemistry II by (789k points)
From which of the mining technique lignite can be extracted?

(a) Open cast mining

(b) High wall mining

(c) Drift mining

(d) Slope mining

I have been asked this question in exam.

Origin of the question is Solid Fuels in portion Fuels and Combustion of Engineering Chemistry II

1 Answer

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Best answer
The correct answer is (a) Open cast mining

To explain: Open cast mining is used when deposits of commercially used minerals are near the surface of the earth. It is a type of surface process.

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