DIAMOND DRILLING FOR FOUNDATION EXPLORATION-Moye
If r is the distance from the hole within which flow conditions are essentially two dimensional and beyond which flow conditions are essentially spherically symmetrical in three dimensions, these results may be combined to give
Discussion
Mr. D. H. Stapledon (non-member).—Mr. Moye's excellent paper shows the very high standard of diamond drilling and geological procedures developed by the Engineering Geology Branch of the Snowy Mountains Authority. I have heard often from overseas visitors, and from Australians returning from study tours overseas, that Australian diamond coring equipment is the best in the world. Much of the credit for this must go to the Snowy Mountains Authority.
I would like to underline Mr. Moye's comments on the importance of boxing diamond drill cores in a systematic manner which shows clearly the extent and location of all core losses. The reasons for this, as set out by Mr. Moye, are quite obvious, but many organizations still persist with methods in which the core losses are hidden. To quote from the King Street Bridge report, those who persist with this latter practice are "taking serious risks".
Mr. T. H. Stephenson (Associate Member, Sydney Division).—
(1) Oriented Cores.—Some little experience elsewhere may be mentioned.
(i) "Performance of Auger Core Sampler" (Ref. D1). Con- clusion (c) states "...the sampler tube...does in fact rotate...".
(ii) The writer is aware of a case where certain equipment, expected to be used, at most, on a few adjacent sites, was dispersed
