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全断面岩石掘进机(Full Face Rock Tunnel Boring Machine,简写为TBM)平面刀盘上一般安装有中心滚刀、正刀和边刀,有些情况下还安装扩孔刀,其中正刀安装数量与消耗量所占的比例较高。如我国秦岭隧道出口TBM施工中显示正刀刀圈消耗量是边刀的8倍多,是中心刀消耗量的近20倍,而且刀圈的价格约为整把刀具价格的三分之一,因此,研究全断面岩石掘进机平面刀盘上正刀磨损机理不仅具有重要的学术意义,而且还具有较高的经济意义。在分析TBM正刀破岩运动的基础上,提出了其弧长磨损系数,并根据工程记录数据进行求解,得出弧长磨损系数可正确反映盘形滚刀磨损规律的结论。从而为盘形滚刀的检查、评估换刀时间、提高作业效率提供了理论和实验依据。
Full face rock tunnel boring machines (Full Face Rock Tunnel Boring Machine, abbreviated as TBM) plane cutters generally installed on the central hob, knife and edge knife, in some cases also install reaming knife, knife knife which is the number and consumption The proportion of the higher proportion. Such as our country Qinling tunnel exit TBM construction shows knife knife ring consumption is more than 8 times the edge knife is the center knife nearly 20 times the consumption and the price of the knife ring is about one-third of the entire tool price, Therefore, it is not only of academic significance but also of high economic significance to study the wear mechanism of the full-face rock cutter plane cutter on the cutterhead. Based on the analysis of the TBM breaking rock movement, the arc length wear coefficient is proposed and solved according to the engineering record data. The conclusion is drawn that the wear coefficient of arc length can correctly reflect the wear law of the disc cutter. This provides a theoretical and experimental basis for the inspection of the disc cutter, the evaluation of the tool change time and the improvement of the working efficiency.