期刊论文

Study on dynamic rock breaking process of disc hob at different rates

中文

武汉轻工大学学报

2095-7386

2022

41

3

46-52

10.3969/j.issn.2095-7386.2022.03.008

本校为第一机构

为了研究盘形滚刀动态破岩的损伤机理,根据福州电缆隧道工程地质和TBM盾构机设备参数,建立了滚刀-岩石三维有限元模型,基于岩石动力损伤本构模型,研究贯入速率和切割速率对滚刀破岩过程中岩石动力损伤演化的规律。通过滚刀在不同贯入速率、切割速率下的破岩仿真,分析了影响滚刀切削岩石效率的关键因素,结果表明滚刀破岩存在最佳贯入速率,计算条件下宜控制在48~64 mm/s范围。切割速率是破岩效率的主要影响因素,计算条件下,保证滚刀不发生塑性屈服的最优切割速率范围为6~8 r/min,破岩效率随切割速率的增大而提高,滚刀承受岩石反力随切割速率的增大而增大,这与工程实际施工中切割速率过大导致的滚刀...

In order to study the dynamic rock breaking damage mechanism of disc cutter, according to the engineering geology of Fuzhou cable tunnel and the equipment parameters of TBM shield machine, a three-dimensional finite element model of disc cutter-rock is established. Based on the constitutive model of rock dynamic damage, the law of penetration rate and cutting rate on the evolution of rock dynamic damage during rock breaking by disc cutter is studied. The key factors affecting the efficiency of rock cutting by hob are analyzed through rock breaking simulation under different penetration rates a...