Have you ever heard of “room and pillar” in the mining industry ? This is when seams of coal are only partially mined, leaving large blocks – or pillars – of coal behind to support the rock above.
Learn more on our last YouTube video ! https://t.co/nqCHSjRL2v
Digging a tunnel has always been a facinating process, but what's behind the complex tech of a tunneller ?
Learn more on our last FRAME video ! https://t.co/h6dmIro6Jq
While constructing canals took decades in the past, nowadays we have special, multi-million-dollar machines that can do the job much faster. Learn more on our last FRAME video ! https://t.co/hJoeVhqET9
According to the Federal Railroad Administration’s Office of Safety Analysis, there are over 1,200 train derailments every year in the United States. Learn more on our last FRAME video ! https://t.co/yOegsrIfAe