结泥条件下TBM滚刀破岩能量演化机制及掘进参数优化研究  

Research on the Energy Evolution Mechanism in Rock Breaking and Excavation Parameter Optimization of TBM Cutters Under the Condition of Argillization

作　　者：张鹏 赵腾跃 李元龙 刘勃龙 ZHANG Peng;ZHAO Tengyue;LI Yuanlong;LIU Bolong(Beijing Municipal Road&Bridge Group Co.,Ltd.,Beijing 100045,China;School of Civil Engineering,Shaoxing University,Shaoxing,Zhejiang 312000,China)

机构地区：[1]北京市政路桥股份有限公司,北京100045 [2]绍兴文理学院土木工程学院,浙江绍兴市312000

出　　处：《矿业研究与开发》2024年第5期201-210,共10页Mining Research and Development

基　　金：浙江省自然科学基金探索项目(LTGS23E040001)。

摘　　要：岩石隧道掘进机(Tunnel Boring Machine,TBM)在泥岩地层掘进过程中,渣土易形成泥浆黏附在滚刀和刀盘表面,出现刀盘结“泥饼”现象,严重降低掘进效率。为了揭示结泥对TBM滚刀破岩效率的影响,防止滚刀结泥,使用离散元程序PFC3D模拟TBM滚刀回转切割泥岩过程,计算了系统总能量E、弹性应变能Ee、摩擦能E_μ、阻尼能E_β、动能Ek和黏结能Ea,从能量演化角度研究结泥条件下TBM滚刀破岩机制。随后分析了不同刀盘推力、滚刀刀刃角和刀刃宽度下的TBM滚刀破岩过程中的能量特征,根据“累积热量和累积黏结能最低,且滚刀表面黏附的泥化物质量最小”的原则,对上述掘进参数进行优化。研究结果表明,PFC3D中的黏聚滚动阻力线性模型可实现滚刀结泥过程;在结泥情况下,泥化物的形成将显著提高机械做功,消耗大量能量,降低滚刀破岩效率;提高刀盘推力可以促进泥化物的形成,导致刀盘升温,诱发泥化物黏附在滚刀表面。选用刀刃角为40°的V形滚刀,设最优刀刃宽度为13 mm,可减小滚刀结泥情况。研究结果可为相关工程中预防刀盘结“泥饼”提供理论参考。During the excavation process of tunnel boring machine(TBM)in the mudstone strata,the residue soil is prone to form slurry that adheres to the surface of the cutter and cutterhead,resulting in the phenomenon of“mud cake”,which seriously reduces the excavation efficiency.In order to reveal the influence of argillization on the rock breaking efficiency of TBM cutters and prevent argillization,the discrete element program PFC3D was used to simulate the process of TBM cutters rotating and cutting mudstone.The total energy of the system E,elastic strain energy E_e,friction energy E_μ,damping energy E_β,kinetic energy E_k and adhesive energy E_a were calculated,and the rock breaking mechanism of TBM cutters under the condition of argillization was studied from the perspective of energy evolution.Subsequently,the energy characteristics of TBM cutters during rock breaking under different cutterhead thrusts,rolling cutter blade angles,and blade widths were analyzed.According to the principle of“the lowest accumulated heat and adhesive energy,and the minimum mass of slurry adhered to the surface of the cutter”,the above excavation parameters were optimized.The research results indicate that the cohesive rolling resistance linear model in PFC3D can achieve the argillization process of cutter.Under the condition of argillization,the formation of slurry will significantly increase mechanical work,consume a large amount of energy,and reduce the efficiency of rock breaking with rolling cutters.Increasing the thrust of the cutterhead can promote the formation of slurry,causing the cutterhead to heat up and inducing slurry to adhere to the surface of the cutter.Selecting a V-shaped cutter with a blade angle of 40°and setting the optimal blade width to 13 mm can reduce the occurrence of argillization.The research can provide a theoretical reference for the prevention of“mud cake”in related engineering projects.

关 键 词：岩石隧道掘进机 结泥 能量 破岩机制 掘进参数 

分 类 号：TD421[矿业工程—矿山机电] U455.43[建筑科学—桥梁与隧道工程]