Research on rock breaking mechanism for conical cutterhead of full face shaft boring machine

DOI:	10.11809/bqzbgcxb2024.04.037
Keywords:	full face shaft boring machine;conical cutterhead;mechanization of rock breaking;rock breaking efficiency
Abstract:	The cutterhead and cutter system as a key component of the full face shaft boring machine, different tapers of the cutterhead and cutter spacing play a decisive role in the rock breaking of the cutter. The software of ABAQUS was utilized to establish a dynamic rock breaking model of the cutter which was used to analyze the influence of different cutterhead tapers and cutter spacing on the rock breaking of cutters. The force situation and rock breaking efficiency of the cutter in the rock breaking process was obtained. The results show that the rock breaking efficiency of the cutter decrease with the increase of the cutter taper and the increase of the installation radius of the cutter. And the highest rock breaking efficiency is acquired when the cutter taper is 120°and the cutter spacing is 40 mm after integrating the force of the cutter, rock breaking efficiency and actual working conditions. A theoretical basis for the design of conical cutterhead of shaft boring machine is provided, and the rock breaking efficiency of shaft boring machine and the development level of the whole machine is efficiently improved.
Published:	2024-04-30
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