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. © 2012 Elsevier Ltd.
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, Elsevier, Jan 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
Article - Journal
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