基于协同破岩的TBM刀盘优化策略

岩石隧道掘进机工作时的刀具受力情况是影响刀盘破岩性能的关键。为了分析滚刀之间的协同破岩效应,提出3种基本的协同破岩模式,并将多把滚刀协同破岩过程等效为3种破岩模式的组合。不同破岩模式下,滚刀切割岩石的先后顺序不同,结合线性切割试验,证实了不同模式下3种滚刀力等级的大小关系。以引汉济渭岭北隧洞TBM工程为背景,研究得出名义磨损量与破岩模式的叠加效应具有较强的相关性,其中,由内而外模式占比与滚刀名义磨损量具有明显的正相关性,据此提出了考虑刀具磨损量的TBM刀盘刀具优化策略。

Optimization Strategy of TBM Disc Cutter Based on the Collaborative Rock Fragmentation Patterns

The mechanism of disc cutter during tunneling is a key problem influencing the performance of TBM.In order to analyze the collaborative effects of rock fragmentation by cutters,three basic collaborative rock fragmentation patterns are put forward,supposing that the collaborative process of rock fragmentation is equivalent to a combination of the three rock fragmentation patterns.Because of different cutting sequences of cutters in the process of rock fragmentation,it is found that the cutter force of the three rock fragmentation patterns is divided into three levels,which has been verified by linear cutting machine tests.Based on the Yinhanjiwei north tunnel TBM project,a strong correlation between the superimposed effect of three rock fragmentation patterns and cutter nominal wear is obtained,and the inside-out pattern proportion has obvious positive correlation with the cutter nominal wear.Optimization strategies of TBM cutter disc cutters considering cutter wear are proposed.