CAJ | 학술논문

为了研究不同切削次序对TBM刀具破岩过程的影响，基于2D离散单元法，利用离散元仿真软件建立了无围压条件下三把TBM刀具按不同次序截割节理不发育岩石的仿真模型．在此基础上设计了一组数值试验，成功地模拟出了TBM刀具在切割岩石时，岩石裂纹生成、扩展和岩石破碎块形成的全过程．仿真结果表明：不同时加栽时所需的刀具临界应力更大；同时加栽和顺次加栽时存在两种不同的破碎模式，虽然破碎区都由侧向裂纹交汇而成，但破碎块的形状有所不同；三种加载方式下，应力的分布规律较相似，且岩石应力场沿中心刀基本对称．
위료연구불동절삭차서대TBM도구파암과정적영향，기우2D리산단원법，이용리산원방진연건건립료무위압조건하삼파TBM도구안불동차서절할절리불발육암석적방진모형．재차기출상설계료일조수치시험，성공지모의출료TBM도구재절할암석시，암석렬문생성、확전화암석파쇄괴형성적전과정．방진결과표명：불동시가재시소수적도구림계응력경대；동시가재화순차가재시존재량충불동적파쇄모식，수연파쇄구도유측향렬문교회이성，단파쇄괴적형상유소불동；삼충가재방식하，응력적분포규률교상사，차암석응력장연중심도기본대칭．
To research into the effect of different cutting orders on breaking mechanism of TBM cutter, this paper establishes the simulation models of breaking rock without joints by double TBM cutters in a simultaneous and sequential orders, which is based on the 2D discrete element method. A series of numerical experiments are designed and the whole process of production and propagation of crack and rock breaking is successfully simulated. The simulation results show that the cutter order determines the breaking mode. The distribution of the principal stress contour is almost symmetrical in the two cutting orders.