Sentence examples for underground coal from inspiring English sources

As it sits underground, coal emits gas.

The use of black powder in underground coal mines is no longer allowed in most countries.

West Virginia also still led the country in underground coal production.

Underground coal mining was formerly by far the largest consumer of black powder.

You'd be surprised how many people think I'm joking when I tell them I'm an underground coal miner.

underground coal gasification.

These bits are widely used in underground coal mining industry.

Underground coal gasification is a combined extraction and conversion process.

Technology of Underground Coal Gasification (UCG) is still under developing and providing alternative for conventional underground coal mining.

This is particularly relevant in underground coal mine openings.

Underground coal combustion is a phenomenon known worldwide.