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rock bolt

noun, Mining, Civil Engineering
1.
a steel or fiberglass bolt inserted and anchored in a hole drilled in rock to prevent caving of the roof of a tunnel or subterranean chamber.
Origin
1955-1960
1955-60
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for rock bolt
  • In general, results indicate that tendon reinforcements are in better condition relative to rock bolt reinforcements.
  • The targets were screwed into reusable holes that had been drilled and tapped in rock bolt plates.
  • Stabilization would be accomplished with either rock bolt anchors or a localized cable net system.
Encyclopedia Article for rock bolt

in tunneling and underground mining, steel rod inserted in a hole drilled into the roof or walls of a rock formation to provide support to the roof or sides of the cavity. Rock bolt reinforcement can be used in any excavation geometry, is simple and quick to apply, and is relatively inexpensive. The installation can be fully mechanized. The length of the bolts and their spacing can be varied, depending on the reinforcement requirements.

Learn more about rock bolt with a free trial on Britannica.com
Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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Word Value for rock

10
11
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