ISSN: 1945-7545
CODEN: GTJODJ
Page Count: 5

Feasibility of Drag Bit Tunneling in Limestone

Rad, PF
Member of ASTM, Dover, Mass.

Abstract

A series of experiments were performed to assess the values of performance indicators of drag bits in limestone. The experiments were done with a constant normal thrust linear cutter. The results show that for sharp drag bits, productivity and efficiency of drag bits are superior to that of disk cutters. However, the high values of cutting coefficient point to high torque requirements for drag bit machines.

Keywords:
rocks, rock excavation, tunnel construction, limestones, drag bits, disk cutters

Paper ID: GTJ10761J
DOI: 10.1520/GTJ10761J
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