German Erkat ER1500-1XL cutting head model is established based on PRO/E, and the element model of rock-soil milling is simulated and analyzed by LS-DYNA solver. DRUCKER-PRAGER constitutive model is employed for rock, and rigid model is adopted for cutting head. The milling parameters(the cutting depth, cutting thickness and cutting mode) are modified by means of numerical simulation and the rules of tunnel milling excavation are obtained based on field data. The results show that:(1)when the mean value of cutting pick has little difference, the bigger the difference coefficient, the more the cutting pick is subject to damage;( 2 ) the cutting depth and vertical swinging velocity turn to be an exponential relationship with specific energy consumption( Hw ) , increasing the cutting depth is more effective than increasing vertical swinging velocity for higher cutting thickness, and cutting resistance has linear relationship with cutting thickness;(3) down cutting should be applied as much as possible for better cutting efficiency and long life cycle of the cutting pick.%基于PRO/E建立艾卡特ER1500-1XL铣挖头模型导入LS-DYNA中，选择DRUCKER-PRAGER本构模型模拟岩土材料，刚体模拟铣挖头进行铣削岩土仿真。通过数值模拟方法改变隧道铣挖法中铣削参数(吃刀深度，截割厚度，铣挖方式)，结合现场资料得到隧道铣挖规律。结果如下：(1)截齿荷载平均值差异不大时差异系数较大是截齿破坏的主要原因；(2)吃刀深度和垂直摆动速度与单位比能耗呈指数关系，加大吃刀深度比摆动速度对加大截割厚度更有效，截割阻力与截割厚度成线性关系；(3)铣挖尽量采用顺切，较为省力，延长截齿寿命。
展开▼
