哈尔滨工程大学学报2016，Vol.37Issue(10)：1424-1431,8.DOI:10.11990/jheu.201509032
节理岩体下TBM单刃和双刃滚刀破岩特性研究
Study on the characteristics of breaking jointed rock by tunnel boring machine single-point and double-point cutters
摘要
Abstract
In this study, we investigated the breaking behavior of rock penetrated by two types of tunnel boring ma⁃chine ( TBM) disc cutters with respect to the geological condition of the joint. We used the particle discrete element method to establish a model for penetrating the rock with the two types of cutters and analyzed the dynamic breaking behavior of rock and crack propagation. Our results show that the formation and propagation of cracks involves two classic stages and that the force and number of cracks differ when penetrating a jointed rock using two types of cut⁃ters. A change in the joint angle has guide and blocking effects on crack propagation. When using a double⁃pint cut⁃ter and the joint spacing is more than 80 mm, this angle controls the crack propagation. With respect to the forma⁃tion of rock chips, the rock exhibits regular and joint⁃coordinated breaking modes based on the type of slag pro⁃duced by the breaking rocks. When using a single⁃point cutter, a change in joint angle deflects the stress distribu⁃tion caused by the cutter inside the rock but has little effect on the stress distribution caused by the two⁃point cutter. The rock⁃breaking efficiency of the two cutters changes with changes in the joint characteristics. When the cutter spacing is adequate, the double⁃point cutter has higher efficiency than the single⁃point cutter. There is an optimal cutter spacing that maximizes the efficiency of breaking rocks when the double⁃point cutter is penetrating a jointed rock, and this spacing will increase first and then decrease with increases in the joint angle.关键词
隧道掘进机/滚刀/破岩/节理/裂纹/比能耗Key words
tunnel boring machine( TBM)/cutter/breaking rock/joint/crack/specific energy分类
交通工程引用本文复制引用
张旭辉,夏毅敏,谭青,林赉贶,劳同炳,刘杰..节理岩体下TBM单刃和双刃滚刀破岩特性研究[J].哈尔滨工程大学学报,2016,37(10):1424-1431,8.基金项目
国家重点基础研究发展计划（2013CB035401）；国家高技术研究发展计划（2012AA041803）；国家自然科学基金项目（51274252，51475478）；中南大学中央高校基本科研业务费专项资金资助（2016zzts043）． （）
