为准确判断和预测滚刀磨损生命周期,指导TBM安全、高效施工,采用现场跟踪试验和理论预测模型相结合的方法对滚刀磨 损进行分析研究。 由滚刀磨损机制分析得到,TBM滚刀磨损主要为磨粒磨损;基于滚刀破岩磨损现场跟踪试验,分析TBM滚刀磨 损失效形式,并结合刀盘刀具分布特点,研究滚刀磨损规律特性。 基于Rabinowicz磨粒磨损简化计算模型,引入CSM滚刀破岩模 型,构建滚刀磨损速率、线性磨损速率预测模型,对比分析高黎贡山正洞TBM 2 000 m掘进里程滚刀磨损实测数据与理论模型预测 结果。 结果表明: 1)正滚刀磨损发生规律性变化,中心滚刀易出现侧向滑移,边滚刀发生二次磨损; 2)TBM滚刀理论预测与实测 分析结果的相对误差小于10%,可准确预测滚刀磨损,同时得到正滚刀磨损速率与刀具、围岩物理参数具有相应的定量关系。

In order to accurately judge and predict the life cycle of disc cutter wear and grantee safe and efficient construction of TBM, disc cutter wear is analyzed through the combination of field tracking test and theoretical prediction model. By analyzing the mechanism of disc cutter wear, it is concluded that abrasive wear is the main mode. The failure mode of disc cutter wear is analyzed through field tracking test in rock-breaking process, and according to the distribution characteristics of cutterhead, the wear characteristics of disc cutter are studied. Based on Rabinowicz abrasive wear simplified calculation model and CSM disc cutter′s rock breaking model, a prediction model of disc cutter wear rate and linear wear rate is established, and then the measured disc cutter wear data for driving 2 km in main Gaoligongshan Tunnel and the prediction results of theoretical mode are compared. The results show that: (1) The wear of positive disc cutter changes regularly, while the central disc cutter tends to slip laterally and the edge disc cutter wears twice. (2) The relative error between theoretical prediction and measured analysis results of TBM disc cutter is less than 10%, which demonstrates that the model can accurately predict disc cutter wear. Meanwhile, the quantitative relationship between the wear rate of the positive disc cutter and physical parameters of the tool and surrounding rock is obtained.