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- W4206786501 abstract "This chapter presents the definitions of permeability and hydraulic conductivity and discusses the tensorial nature of permeability. The subject of the permeability of the rock mass is studied in terms of the effective permeability of discontinuity networksThe subject of permeability is concerned with fluid flow through a material, or rocks and rock masses, and is one of the most difficult topics facing the practising rock engineer. The chapter also discusses the difficulty of dealing with effective stresses in rock mechanics and the permeability-related applications of grouting and blasting. There are interrelations between most of the rock properties: the flow of fluid through a fractured rock mass is no exception, as it will depend on: (a) the aperture of the fractures, which in turn will depend on (b) the normal stress acting across the fractures, which in turn will depend on (c) the depth below the ground surface. One of the main engineering solutions for reducing the permeability of a fractured rock mass is to inject a grout, which may be a suspension (e.g. cement grout), an emulsion (e.g. bitumens) or a solution, which subsequently blocks the flow paths through the rock mass. Blasting technology has also tended to be almost entirely empirically based: the type of blasting round, the quantity of explosive and the detonation procedures have been established by trial and error. A rock which has no discontinuities has to be fractured by the blasting. The chapter indicates two problems associated with water pressure and also elaborates the profound effect of the water on the mechanical behavior of the discontinuities and on the intact rock." @default.
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- W4206786501 date "1997-01-01" @default.
- W4206786501 modified "2023-09-23" @default.
- W4206786501 title "Permeability" @default.
- W4206786501 doi "https://doi.org/10.1016/b978-008043864-1/50010-0" @default.
- W4206786501 hasPublicationYear "1997" @default.
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