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rock excavation

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  • Rock Structure Rating — (RSR) is a quantitative method for describing quality of a rock mass and then appropriate ground support. [cite book last = Bieniawski first = Z. T. authorlink = Z. T. Bieniawski title = Engineering Rock Mass Classifications publisher = Wiley… …   Wikipedia

  • Rock burst — In geology, a rock burst is a spontaneous, violent fracture of rock that can occur in deep mines. The opening of a mine shaft relieves neighboring rocks of tremendous pressure, which can literally cause the rock to explode as it attempts to re… …   Wikipedia

  • Rock mass classification — In geotechnical engineering, the first major rock mass classification system was proposed about 60 years ago for tunnelling with steel support. Later classification systems were developed for non steel support underground excavation, slope and… …   Wikipedia

  • Rock bolt — A rock bolt is a long anchor bolt, for stabilizing rock excavations, which may be tunnels or rock cuts. It transfers load from the unstable exterior, to the confined (and much stronger) interior of the rock mass. Rock bolts were first used in… …   Wikipedia

  • 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

  • rock burst — noun : a violent expulsion of rock from the walls of a mine opening caused by heavy pressure on brittle rocks in deep mines where mining has deprived the rock of support on one side compare bump * * * rock burst, a sudden, violent bursting of… …   Useful english dictionary

  • rock — Stone in the mass or in pieces. The crust of the earth. As used in construction and excavation contracts, not necessarily the meaning of the term in geology. Chicago v Duffy, 117 Ill App 261, affd 218 Ill 242, 75 NE 912 …   Ballentine's law dictionary

  • Mining rock mass rating — Laubscher developed the Mining Rock Mass Rating (MRMR)[1][2][3][4][5] system by modifying the Rock Mass Rating (RMR) system of Bieniawsk …   Wikipedia

  • Underground mining (hard rock) — A three dimensional model of an underground mine with shaft access Underground hard rock mining refers to various underground mining techniques used to excavate hard minerals, mainly those containing metals[1] such as ore containing gold …   Wikipedia

  • Diepkloof Rock Shelter — General view of Diepkloof Rock Shelter General vi …   Wikipedia

  • Lego Rock Raiders — was a Lego theme started 1999, and was discontinued in 2000. Rock Raiders was the only theme in the Lego Underground series. The theme, while short lived, featured sixteen sets and was backed up by numerous story related media, including several… …   Wikipedia

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