ROCK BOLT


Meaning of ROCK BOLT in English

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 ]

Random House Webster's Unabridged English dictionary.      Полный английский словарь Вебстер - Random House .