Stress and Wear Analysis of the Disc Cutter of Rock Tunnel Boring Machine
Sun Jian*, 1, Zhou Peng1, Wu Yuhou1, Yao Jinmei1, Zou Defang1, Liu Min2
Identifiers and Pagination:Year: 2015
First Page: 721
Last Page: 725
Publisher Id: TOMEJ-9-721
Article History:Received Date: 3/10/2014
Revision Received Date: 5/1/2015
Acceptance Date: 17/1/2015
Electronic publication date: 28/9/2015
Collection year: 2015
open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: (https://creativecommons.org/licenses/by/4.0/legalcode). This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Full face rock tunnel boring machine is one of the main machineries and equipments for underground engineering, and the failure of its disc cutter is the main failure form of this machinery. In order to find out the factors of wear of disc cutters and improve the rock breaking efficiency, a lot of research has been done. In this paper, the methods of theoretical research, simulation analysis and engineering application are used. The laws of wear of disc cutters on the cutter head are researched at the process of cutting migmatitic gneiss, and its influence factors are analyzed. The results show that the wear on the edge of disc cutter is serious. The main factor for the wear of disc cutters is its stress from the rocks, and its variance is continual. And wear rate of the disc cutters is proportional to the integrality index of the rocks. With the increase of the amount of wear, the area of contact between a disc cutter and the rock gets bigger, and their extrusion strength gets lower on the contrary. These results are very helpful to the structure optimization of the disc cutter and the improvement of working efficiency.