Tool wear in TBM hard rock drilling – backgrounds and special phenomena

被引：16

作者：

Ellecosta, Peter ^{[1
]}

Käsling, Heiko ^{[1
]}

Thuro, Kurosch ^{[1
]}

机构：

[1] Technische Universität München, Lehrstuhl für Ingenieurgeologie, Arcisstraße 21, München,80333, Germany

来源：

Geomechanik und Tunnelbau | 2018年 / 11卷 / 02期

关键词：

Rocks - Blasting - Infill drilling;

D O I：

10.1002/geot.201800006

中图分类号：

学科分类号：

摘要：

In hard rock TBM drilling, wear issues play a crucial role in the success of a tunnelling project. Thus, excavation tools must be selected carefully and be adapted to ground conditions. Wear-related changes in the tools that occur over the course of the tools' operating lives must also be taken into account. This paper presents five basic types of macroscopic wear for cutter rings: (1) abrasive/normal wear, (2) tapering, (3) mushrooming, (4) brittle fracture of the cutter ring (special wear type 1) and (5) blockade of the roller bearing (special wear type 2). These basic wear types lead to distinct cutter ring shapes which allow deriving some fundamental characteristics of the interacting rock types. In addition, a microscopic analysis of the surfaces and associated metallographic sections from worn cutter tools has been performed. As a result, the tribological processes under the cutter, leading to tool wear, can be better understood. In summary, the investigations may contribute to a better understanding to make it easier to choose the proper TBM disc cutter for a distinct rock type in order to minimize the risk of tool-related downtimes. Copyright © 2018 Ernst & Sohn Verlag für Architektur und technische Wissenschaften GmbH & Co. KG, Berlin

引用

页码：142 / 148