Titlebook: Discontinuity Analysis for Rock Engineering; Stephen D. Priest Book 1993 Stephen D. Priest 1993 Analytical Method.Enzo Paci.Flow.Inuit.bou

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Measurement of discontinuity characteristics,t quantitatively the relevant characteristics of the discontinuities that form the complex three-dimensional fabric of mechanical breaks, termed the . or the ., in the mass. Although this chapter occurs early in the book, the recommended measurement methods presented here cannot be appreciated fully

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Discontinuity orientation,ristics of discontinuities is their orientation, relative both to each other and to any engineering structure or excavation face. Discontinuity orientation data can be presented and utilised in design by two different methods: if the rock face at the design site is readily accessible the locations a

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Discontinuity frequency,er of discontinuities that are observed or predicted to occur in a unit volume, a unit area or a unit length of a sample from a given rock mass. The aim of this chapter is to examine the property of discontinuity frequency from a theoretical and a practical point of view. Section 4.2 presents a brie

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Discontinuity spacing,reciprocal of discontinuity frequency, is widely used as a measure of the ‘quality’ of a rock mass for classification schemes such as those outlined in Appendix C. It is necessary to start this chapter by specifying a number of definitions of discontinuity spacing. The statistical distributions of d

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Discontinuity size,operties to measure accurately. This is because only by completely dismantling a given rock mass is it possible to trace and to measure the complete area of each discontinuity. This has never been done satisfactorily for a rock mass. When studying the size of discontinuities it is desirable also to

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Discontinuities and rock strength,e surrounding rock material. It is reasonable to assume, therefore, that discontinuities will have a marked weakening effect on rock masses, and that this weakening will depend, amongst other things, on the orientation, frequency, size and shear strength of the various discontinuities. The influence

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Discontinuities and rock deformability,rocesses produce a zone of material that is more deformable than the surrounding rock, with an areal extent that reflects the geometry of the original discontinuity and a thickness ranging from a fraction of a millimetre to several metres. In this chapter we are concerned with the influence that suc

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