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Laboratory tests to study the influence of rock stress confinement on the performances of TBM discs in tunnels
Abstract：To clarify some aspects of rock destruction with a disc acting on a high confined tunnel face,a series of tests were carried out to examine fracture mechanisms under an indenter that simulates the tunnel boring machine (TBM) tool action,in the presence of an adjacent groove,when a state of stress (lateral confinement) is imposed on a rock sample.These tests proved the importance of carefully establishing the optimal distance of grooves produced by discs acting on a confined surface,and the value (as a mere order of magnitude) of the increase of the thrust to produce the initiation of chip formation,as long as the confinement pressure becomes greater. 作者： Author： N. lnnaurato C. Oggeri P. Oreste R. Vinai 作者单位： DITAG, Politecnico di Torino, Corso Duca degli Abruzzi 24, Turin, Italy 期 刊： 矿物冶金与材料学报 EISCI Journal： International Journal of Minerals,Metallurgy and Materials 年，卷(期)： 2011, 18(3) 分类号： U451.2 Keywords： tunnels boring machines rock mechanics stress analysis 机标分类号： U45 TP3 机标关键词： TBM stress rock influence tunnel boring machine confined chip formation fracture examine aspects action order long high face 基金项目： Laboratory tests to study the influence of rock stress confinement on the performances of TBM discs in tunnels[期刊论文] 矿物冶金与材料学报 --2011, 18(3)To clarify some aspects of rock destruction with a disc acting on a high confined tunnel face,a series of tests were carried out to examine fracture mechanisms under an indenter that simulates the tunn...【Laboratory tests to study the influe】相关文章：
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