Evaluation of Saturation Effects on Drag Pick Cutting of a Brittle Sandstone from Full Scale Linear Cutting Tests
Sterling, R. and Zhao, J.
A permeable quartzose sandstone was subjected to full-scale cutting tests under a chisel-type drag pick, in both dry and fully saturated conditions. Contrary to the results observed from disc cutting tests in the same setup with the same rock ( Abu Bakar and Gertsch, 2011), saturation actually increased the cutting (drag) and normal (vertical) forces by 9.9% and 9.4%, respectively. The specific energy of cutting also was greater in the saturated samples, by 28%. More expectedly, the relation of fracture surface area to specific energy was confirmed through several descriptors of chip size distribution, including the Rosin-Rammler x' parameter, and the empirical coarseness index. An inverse power relation between coarseness index and specific energy was also confirmed.
B. M. Abu and L. S. Gertsch, "Evaluation of Saturation Effects on Drag Pick Cutting of a Brittle Sandstone from Full Scale Linear Cutting Tests," Tunnelling and Underground Space Technology, vol. 34, pp. 124-134, Elsevier, Feb 2013.
The definitive version is available at http://dx.doi.org/10.1016/j.tust.2012.11.009
Geosciences and Geological and Petroleum Engineering
Keywords and Phrases
Absolute Size Constant; Coarseness Index; Drag Pick; Linear Rock Cutting; Saturation; Specific Energy; Chip Size Distribution; Cutting Test; Descriptors; Fracture Surface Area; Full Scale; Power Relations; Rock Cutting; Saturated Conditions
International Standard Serial Number (ISSN)
Article - Journal
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