Design and stress analysis of pure bolted connection for mining TBM cutterhead under complex geological conditions
MA Rui
WANG Yong
CHEN Huzhong
HE Kaiwei
ZHANG Sheng
MA Xianbo
ZHANG Lixun
LU Yiqiang
WU Hao
CHEN Weiming
Abstract：Tunnel Boring Machine(TBM)play a crucial role in coal mine rock roadway excavation.However,the processes of equipment lowering,transportation,and underground assembly still face urgent technical challenges such as high difficulty in construction manage-ment,significant safety risks,and low operational efficiency.Considering the specific requirements of coal mine roadways for TBM cut-terheads,a pure bolted design concept for cutterheads is proposed,and a combined method of theoretical analysis,ANSYS numerical sim-ulation,and on-site testing is adopted for force analysis.Four load condition models,including maximum thrust,upper-soft and lower-hard strata,turning correction,and stuck-release mode,are established.Various finite element mesh sizes are selected for stress calculation re-spectively.Combined with specific working condition parameters and boundary conditions,force loading is applied to the cutterhead,cla-rifying the maximum stress,maximum displacement,and shear force borne at the segmented positions of the cutterhead under various working conditions.The maximum working load of a single bolt is calculated and its strength check is completed.Through mechanical cal-culation and bolt layout optimization analysis,the optimal segmentation form and bolt distribution are determined,and a pure bolted struc-ture cutterhead suitable for coal mine roadways is developed.The results show that the pure bolted structure increases the underground as-sembly efficiency of the cutterhead by 30%and no bolt failure occurs during the excavation period;the pure bolted structure is reasonably designed,with good safety,reliability,and convenience in disassembly,assembly,and maintenance;the underground application has veri-fied the effectiveness of the established load condition models,bolt calculation methods,and preload verification methods.
Keywords：rock roadway excavationTunnel Boring Machine(TBM)working conditionsblock designdetachable structurepure bolted connection
Publication Date：2025-11-30
Online Publishing Date：2025-12-15(First online date of this platform, not the publication date of the document)
Pages：10( 351-360 )