Drive head apparatus for driving the drill string of a rock boring machine, such apparatus comprising one or two drill string connectors (28) (30) having resilient means such as a c
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Correlation of model tunnel boring and drilling machine performances with rock p. :1500 :Int. J. Rock Mech. Min. Sci. & Geomech. Abstr. Vol. 23, No. 2, pp. 171
A study of rock properties and tunnel boring machine advance rates in two mica-schist formations : Report. 13F,7R. Dept.Civ.Eng.Univ.Illinois,Urbana-Champaign,1973, 32P P.J.
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rock tunnel boring machine (TBM) disc cutter provides a basis not only for the development of TBM, but also for the prediction of construction time and the cost of a project [1 2] .
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