论文摘要
Predicting the cutter consumption and the exact time to replace the worn-out cutters in tunneling projects constructed with tunnel boring machine（TBM） is always a challenging issue. In this paper, we focus on the analyses of cutter motion in the rock breaking process and trajectory of rock breaking point on the cutter edge in rocks. The analytical expressions of the length of face along which the breaking point moves and the length of spiral trajectory of the maximum penetration point are derived. Through observation of rock breaking process of disc cutters as well as analysis of disc rock interaction, the following concepts are proposed: the arc length theory of predicting wear extent of inner and center cutters, and the spiral theory of predicting wear extent of gage and transition cutters. Data obtained from5621 m-long Qinling tunnel reveal that among 39 disc cutters, the relative errors between cumulatively predicted and measured wear values for nine cutters are larger than 20%, while approximately 76.9% of total cutters have the relative errors less than 20%. The proposed method could offer a new attempt to predict the disc cutter’s wear extent and changing time.
论文目录
文章来源
类型: 期刊论文
作者: Zhaohuang Zhang,Muhammad Aqeel,Cong Li,Fei Sun
来源: Journal of Rock Mechanics and Geotechnical Engineering 2019年01期
年度: 2019
分类: 基础科学,工程科技Ⅱ辑
专业: 公路与水路运输
单位: School of Energy Power and Mechanical Engineering, North China Electric Power University,School of Foreign Languages, North China Electric Power University
基金: supported by the National Natural Science Foundation of China(Grant No.51475163),the National Hightech R&D Program of China(Grant No.2012AA041803)
分类号: U455.39
页码: 111-120
总页数: 10
文件大小: 1066K
下载量: 59