Shaft Lining
In North and South America, smaller shafts are designed to be rectangular with timber supports. Larger shafts are round and are concrete lined.
Read more about this topic: Shaft Mining
Famous quotes containing the word shaft:
“Why should not our whole life and its scenery be actually thus fair and distinct? All our lives want a suitable background. They should at least, like the life of the anchorite, be as impressive to behold as objects in a desert, a broken shaft or crumbling mound against a limitless horizon.”
—Henry David Thoreau (1817–1862)