Evaluation of saturation effects on drag pick cutting of a brittle sandstone from full scale linear cutting tests

被引：55
作者：
Abu Bakar, Muhammad Zubair [1 ]
Gertsch, Leslie Sour
机构：
[1] Missouri Univ Sci & Technol, Dept Geol Sci & Engn, Rolla, MO 65409 USA
来源：
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY | 2013年 / 34卷
关键词：
Linear rock cutting; Drag pick; Coarseness index; Absolute size constant; Saturation; Specific Energy; PERFORMANCE; STRENGTH; PREDICTION; MOISTURE;
D O I：
10.1016/j.tust.2012.11.009
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
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. (c) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码：124 / 134
页数：11
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