Test your knowledge - and maybe learn something along the way.
TAKE THE QUIZ“long-wall”
We have one entry that includes the term long-wall.
longwall system
noun: a method of coal mining in which the working face extends entirely across the seam, the work proceeds either away from or toward the main shaft, and the roof is allowed to cave in behind the workers
Love words? Need even more definitions?
Merriam-Webster unabridged
