<<
[an error occurred while processing this directive] | [an error occurred while processing this directive] >>
Comparative Analysis of Disc Cutter Forces and Wear under Different Wear
Modes
(1. The Ninth Engineering Co., Ltd. of CFHEC of CCCC, Guangzhou 511300; 2. College of Civil and Transportation Engineering,
Shenzhen University, Shenzhen 518060; 3. Key Laboratory for Resilient Infrastructures of Coastal Cities (Shenzhen University),
Ministry of Education, Shenzhen 518060; 4. JSTI Group, Nanjing 210019)
Abstract Based on a self-developed shield rock-breaking simulation device, rotary cutting and rock-breaking
tests of disc cutters were carried out. Compared with conventional linear cutting tests, this method more realistically reproduces the actual motion pattern and loading state of disc cutters. By combining laboratory tests with the discrete element method (DEM), a numerical model for disc cutter circular cutting was established to systematically investigate the force characteristics, wear mechanisms, and specific energy variations of normally worn and eccentrically worn disc cutters during the rock-breaking process. The results show that: (1) the fluctuation ranges of vertical force and torque of disc cutters obtained from the numerical simulations are generally consistent with those mea?
sured in laboratory tests, verifying the capability of the numerical model to represent the dynamic mechanical behavior of disc cutters in rock cutting in laboratory tests ; (2) eccentric wear of disc cutters leads to a 29.9% reduction invertical force and a 48.6% increase in tangential force; (3) engineering case data analysis indicates that when a large number of disc cutters undergo uniform wear, the shield thrust increases while the torque remains essentially stable.In contrast, when eccentric wear becomes prevalent, both shield thrust and torque increase, which is consistent with
the numerical simulation results.
Abstract：
Based on a self-developed shield rock-breaking simulation device, rotary cutting and rock-breaking
tests of disc cutters were carried out. Compared with conventional linear cutting tests, this method more realistically reproduces the actual motion pattern and loading state of disc cutters. By combining laboratory tests with the discrete element method (DEM), a numerical model for disc cutter circular cutting was established to systematically investigate the force characteristics, wear mechanisms, and specific energy variations of normally worn and eccentrically worn disc cutters during the rock-breaking process. The results show that: (1) the fluctuation ranges of vertical force and torque of disc cutters obtained from the numerical simulations are generally consistent with those mea?
sured in laboratory tests, verifying the capability of the numerical model to represent the dynamic mechanical behavior of disc cutters in rock cutting in laboratory tests ; (2) eccentric wear of disc cutters leads to a 29.9% reduction invertical force and a 48.6% increase in tangential force; (3) engineering case data analysis indicates that when a large number of disc cutters undergo uniform wear, the shield thrust increases while the torque remains essentially stable.In contrast, when eccentric wear becomes prevalent, both shield thrust and torque increase, which is consistent with
the numerical simulation results.
WANG Yonggang1 CUI Yikun1 WU Jiuqi2,
3 HUANG Jun4 SHEN Xiang2,
3 YANG Kui4 SU Dong2 etc
.Comparative Analysis of Disc Cutter Forces and Wear under Different Wear
Modes[J] MODERN TUNNELLING TECHNOLOGY, 2025,V62(4): 73-81
2025, Vol. 62 