NASA NTRS · 19740014956
Rock sampling
Abstract
A method for sampling rock and other brittle materials and for controlling resultant particle sizes is described. The method involves cutting grooves in the rock surface to provide a grouping of parallel ridges and subsequently machining the ridges to provide a powder specimen. The machining step may comprise milling, drilling, lathe cutting or the like; but a planing step is advantageous. Control of the particle size distribution is effected primarily by changing the height and width of these ridges. This control exceeds that obtainable by conventional grinding.
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Blum, P.. 1971-10-12. Rock sampling. https://ntrs.nasa.gov/citations/19740014956
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