铁道科学与工程学报2025，Vol.22Issue(1)：456-468,13.DOI:10.19713/j.cnki.43-1423/u.T20240475
基于岩碴比表面积的完整岩体TBM破岩效率分析
Analysis of TBM rock breaking efficiency based on the specific surface area of rock chips for intact rock mass
摘要
Abstract
Rock chips are direct product of rock-machine interaction during TBM excavation,and its fragmentation degree,morphological characteristics,particle size distribution,and other information are important feedback indicators for TBM rock breaking efficiency.Based on in-situ sieving tests and in-lab 3D scanning tests of rock chips,the morphological characteristics of TBM rock chips and its variation with particle size were quantitatively analyzed.A calculation method for specific surface area of rock chips based on particle size distribution was proposed,which accurately calculates the actual specific surface area of rock chips samples under different particle size distribution conditions.The calculation results of the specific surface area of rock chips were verified by combining the new surface theory indicators,and the internal relationship between the specific surface area of rock chips and the rock breaking efficiency of TBM was analyzed.The research results show that as the particle size of rock chips increase,the sphericity and flatness of rock chips gradually decrease,while the elongation gradually increases.Overall,the larger the extension length of rock chips,the smaller the flatness and sphericity,the higher the coarseness index,and the higher the rock breaking efficiency of TBM.The actual specific surface area of rock chips could be calculated by the integration method,using the prediction function and cumulative distribution function of the specific surface area.Analysis shows that the data can approximately represent the size of the newly added surface area per unit mass of rock mass after fragmentation.The specific surface area of rock chips has a good linear correlation with the index of newly added surfaces theory,which can mutually verify their accuracy and rationality.The specific surface area of rock chips increases with the increase of TBM tunneling specific energy and penetration index,and decreases with the increase of coarseness index of rock chips.The larger the specific surface area,the lower the rock breaking efficiency of TBM.关键词
TBM/岩碴/破岩效率/三维扫描/形态特征/比表面积Key words
TBM/rock chips/rock breaking efficiency/3D scanning/morphological characteristics/specific surface area分类
建筑与水利引用本文复制引用
闫长斌,石雨萱,李严,李庆民,刘永胜,吴遁..基于岩碴比表面积的完整岩体TBM破岩效率分析[J].铁道科学与工程学报,2025,22(1):456-468,13.基金项目
国家自然科学基金资助项目(41972270) （41972270）
盾构及掘进技术国家重点实验室开放课题(SKLST-2019-K06) （SKLST-2019-K06）
水利部黄河流域水治理与水安全重点实验室(筹)研究基金资助项目(2022-SYSJJ-06) （筹）
中铁十四局集团有限公司科技研发计划课题(9137000016305598912021C03) （9137000016305598912021C03）
