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:
“Keep out of Chancery.... It’s being ground to bits in a slow mill; it’s being roasted at a slow fire; it’s being stung to death by single bees; it’s being drowned by drops; it’s going mad by grains.”
—Charles Dickens (1812–1870)
“Universal suffrage should rest upon universal education. To this end, liberal and permanent provision should be made for the support of free schools by the State governments, and, if need be, supplemented by legitimate aid from national authority.”
—Rutherford Birchard Hayes (1822–1893)