Ground Support
Some means of support is required in order to maintain the stability of the openings that are excavated. This support comes in two forms, local support and area support.
Read more about this topic: Underground Mining (hard Rock)
Famous quotes containing the words ground and/or support:
“On every tree a bucket with a lid,
And on black ground a bear-skin rug of snow.
The sparks made no attempt to be the moon.
They were content to figure in the trees
As Leo, Orion, and the Pleiades.
And that was what the boughs were full of soon.”
—Robert Frost (1874–1963)
“Have a sense of piety ever on your mind, and be ever mindful that this is subject to no change, but will last you as long as life and support you in death. Elevate your soul by prayer and by contemplation without mystical enthusiasm.”
—James Boswell (1740–1795)