Rock-Cutter Boreability Parameters (Annual Report)

摘要

The objectives of this investigation were to: (1) develop scaling relationships relating small-scale laboratory tests to full-scale field boring; (2) compare the efficiency of rock breakage under various cutter types; (3) develop a theoretical model of rock breakage under a cutter based on experimental rock cutting results; and (4) specify machine design parameters based on the experimental, theoretical, and field analyses of this investigation. This document reports the results of tests to determine the cutting characteristics of a cutter-rock combination at two scales of cutter size and loads to determine if one could be successfully predicted from the other. The small-scale tests could be applied to cores from a proposed tunnel site, and the large-scale tests were designed to simulate actual field boring cutter loads and geometry. The resulting characteristic behavior determined for a cutter-rock combination will also be valuable for machine design.