TBM盘形滚刀破岩刃弧长研究分析

根据全断面隧道掘进机(TMB)盘形滚刀破岩运动的规律,综合考虑滚刀和掌子面相互的关系,利用空间几何理论以及空间运动学的坐标变换矩阵法建立了盘形滚刀工作刃破岩的运动学模型.采用Matlab软件编程对模型求解,得到盘形滚刀对掌子面的理论压碎轨迹的仿真图形及其破岩刃各点一次破岩弧长分布规律.结合仿真结果对比研究了TBM刀盘上中心刀和正刀的破岩刃弧长分布的规律.随着盘形滚刀刀位半径的增加,滚刀破岩刃一次破岩弧长呈下降趋势,但累计破岩弧长线性增加.盘形滚刀破岩仿真方法有利于对刀具磨损、破岩机理、刀具优化设计及其在刀盘上布局优化的研究.

Research and Analysis on the Arc Length of the Rock Breaking Point on TBM's Disc Cutter

Based on its rock breaking movement in the full-face tunnel boring machine (TBM)， and the interaction between the disc cutter and the tunnel face being taken into account at the same time， a kinematics model of disc cutter was built by using coordinate transformation matrix method of space geometry and spatial kinematics. The three-dimensional figures of the theory crushed trajectory made by the disc cutter on the tunnel face and the arc length of the rock breaking point were obtained by using Matlab software. The simulation results show that the arc length on disc cutter decreases with the increasing of the cutter radius on cutter head， but the total arc length after cutter head rotating one circle increases linearly. The results are useful to research on tool wear and rock breaking mechanism， as well as to optimize the design and layout of disc cutters on the cutter head.