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.
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Famous quotes containing the words ground and/or support:
“As the farmer casts into the ground the finest ears of his grain, the time will come when we too shall hold nothing back, but shall eagerly convert more than we now possess into means and powers, when we shall be willing to sow the sun and the moon for seeds.”
—Ralph Waldo Emerson (1803–1882)
“He uses statistics as a drunken man uses lamp-posts—for support rather than illumination.”
—Andrew Lang (1844–1912)