中南大学学报（自然科学版）2017，Vol.48Issue(5)：1293-1299,7.DOI:10.11817/j.issn.1672-7207.2017.05.023
节理倾角和间距对TBM双刃盘形滚刀破岩效率的影响
Effects of joint angle and joint space on rock fragmentation efficiency by two TBM disc cutters
摘要
Abstract
Based on laboratory tests, the effects of joint angle and joint space on the penetration of two TBM disc cutters were studied. In the test, concrete jointed specimens were adopted to simulate jointed rock mass. The angleαbetween joint plane and tunnelling axis were 0°, 30°, 60° and to 90°, and four joint spaces were 20, 30, 40 and 50 mm respectively. Penetration depth and penetration force were collected during the loading process. Shooting with the camera in real time, photographs of the damage of specimen and failure mode of the development process were taken. The results show that there exists three basic modes of rock fragmentation which are mainly related to the joint orientation. The interaction between rock and TBM double disc cutter leads to cracks coalescence and chips formation. The specific energy achieves the minimum at the joint angleα=60° and the fragmentation efficiency of two TBM disc cutters can reach the highest. The joint space has significant impact on the formation of rock chips. Specifically, the specific energy increases with the increase of the joint space, but the fragmentation efficiency presents the opposite trend.关键词
节理倾角/节理间距/TBM双刃滚刀/破岩模式/破岩效率Key words
joint angle/joint space/two TBM disc cutters/fragmentation modes/fragmentation efficiency分类
交通工程引用本文复制引用
曹平,林奇斌,李凯辉,韩东亚..节理倾角和间距对TBM双刃盘形滚刀破岩效率的影响[J].中南大学学报（自然科学版）,2017,48(5):1293-1299,7.基金项目
国家重点基础研究发展计划(973计划)项目(2013CB035401) （973计划）
中央高校基本科研业务费专项资金资助项目(2015zzts262) (Project(2013CB035401) supported by the National Basic Research Development Program (973 Program) of China （2015zzts262）
Project(2015zzts262) supported by the Central University Special Fund For Basic Scientific Research Business Expenses) （2015zzts262）
