Numerical simulation of the rock fracture process induced by multi-disc-cutters and cutter spacing design
Numerical simulation of the rock fracture process induced by multi-disc-cutters and cutter spacing design
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发表时间：
2012
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通讯作者：
Zhang Xu
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作者：
Zhang Xu
相邻刀盘间距设计是全断面岩石掘进机（TBM）刀盘设计的关键技术之一，直接关系到TBM刀盘的掘进效率和刀具的寿命，相邻刀盘间距设计不仅与边界条件和岩石以及刀盘参数和掘进参数有关，还与刀具结构相互耦合作用;基于岩石破碎-岩石破坏过程分析（RFPA 2D）有限元仿真平台，考虑相邻多刀顺序约束，选取两种典型岩石，（泥质粉红砂岩和花岗岩片麻岩）作为边界条件，在此基础上，建立了滚切次数在垂直压力作用下对岩石破碎的仿真模型，模拟了滚切次数越多，建立了盘形滚刀间距与岩石破碎能量之间的映射关系，从而在多个-建立了最优刀盘间距下的刀盘序位角和破岩能量，确定了不同刀盘位置下的最优刀盘间距和最优刀盘序位角通过这种映射，也可以为今后刀具的布局设计提供设计依据。
Spacing design of adjacent cutters is one of the key technologies in the full face rock tunnel boring machine(TBM) cutter head design,which is directly related to the boring efficiency of the TBM cutter head and the cutter tool's life.Spacing design of adjacent cutters not only is related to the boundary conditions and rock as well as the cutter and cutter parameters of the tunneling parameters,but also couples with the cutter structure interaction;it is a sequential process of broken rock.Based on the finite element simulation platform of rock crushing-Rock Failure Process Analysis(RFPA2D),considering the adjacent multi-cutters sequential constraints,taking two typical rocks(muddy pink sandstone and granite gneiss) as boundary conditions,smoother hob times under the vertical pressure into the rock crushing simulation model were constructed.This simulated how the multi-cutters in the sequential and simultaneous pressure pushed the rock into the simulation process.The mapping between disc cutters spacing and rock fragmentation energy was established,and thereby a mapping between multi-cutters sequential location angle and the energy of rock fragmentation was established during spacing of the optimal cutters.The cutters' optimal spacing and the optimal sequential angle in a different location can be determined through this mapping,and it can also provide the design basis for the layout design of future cutters.