Fracture sampling on a cylinder: From scanlines to boreholes and tunnels |
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| Authors: | M Mauldon J G Mauldon |
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| Institution: | (1) Present address: Institute for Geotechnology, Department of Civil and Envitonmental Engineering, College of Engineering, University of Tennessee, 223 Perkins Hall, 37996-2010 Knoxville, TN, USA;(2) Department of Mathematics and Computer Science, Amherst College, Amherst, USA |
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| Abstract: | Summary In this paper we develop correction factors for orientation bias when sampling rock fractures with a borehole. For a borehole with zero radius we obtain Terzaghi's result for scanline sampling: otherwise the appropriate correction factor may differ significantly from that obtained for the scanline model, depending on the relative size of the borehole and the rock fracture. Two separate cases are discussed: the sampling of fractures with a borehole and sampling with the surface of a borehole. Analytical expressions for the correction factors are graphed and tabulated. |
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