sliding wedge roof bolt

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rock bolt — Mining, Civ. Engin. 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. [1955 60] * * * ▪ mining in tunneling and underground mining, steel rod… … Universalium
Glossary of climbing terms — This page describes terms and jargon related to climbing and mountaineering. Contents: Top · 0–9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z A … Wikipedia
tunnels and underground excavations — ▪ engineering Introduction Great tunnels of the world Great tunnels of the worldhorizontal underground passageway produced by excavation or occasionally by nature s action in dissolving a soluble rock, such as limestone. A vertical opening … Universalium
Glossary of rail terminology — Rail transport Operations Track Maintenance High speed Gauge Stations … Wikipedia
Glossary of nautical terms — This is a glossary of nautical terms; some remain current, many date from the 17th 19th century. See also Wiktionary s nautical terms, Category:Nautical terms, and Nautical metaphors in English. Contents: A B C D E F G H I J K L M N O P Q R … Wikipedia

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