Linear cutting tests on effect of confining stress on rock fragmentation by TBM cutter - 文章详情页

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In　deep　tunnel　construction,　TBM　faces　the　rock　stress　problems　induced　by　overburden　or　anisotropic　stress,　which　had　been　under　more　and　more　attention.　In　this　paper,　full-scale　cutting　tests　are　presented　to　investigate　the　effect　of　different　confining　stresses,　i.e.　0,　5,　10,　and　15　MPa,　on　rock　fragmentation　of　large　intact　granite　sample　with　dimension　of　1.0　m×1.0　m×0.6　m　induced　by　TBM　cutter.　In　these　tests,　the　characteristics　of　force-time　curves,　normal　forces,　rolling　forces,　specific　rock　mass　boreability　index,　chipping　thickness　and　specific　energy　affected　by　confining　stress　were　analyzed.　©　2016,　Science　Press.　All　right　reserved.

关键词：

Confining stress; Full-scale linear cutting tests; Granite; Penetration rate; Tunnel boring machine(TBM); Tunnelling engineering

作者机构：

[ 1 ] [Ma, H.]CNNC Key Laboratory on Geological Disposal of High-level Radioactive Waste, Beijing Research Institute of Uranium Geology, Beijing, 100029, China
[ 2 ] [Gong, Q.]Key Laboratory of Urban Security and Disaster Engineering of Ministry of Education, Beijing University of Technology, Beijing, 100124, China
[ 3 ] [Wang, J.]CNNC Key Laboratory on Geological Disposal of High-level Radioactive Waste, Beijing Research Institute of Uranium Geology, Beijing, 100029, China
[ 4 ] [Zhao, X.]NJU-ECE Institute for Underground Space and Geo-environment, Nanjing University, Nanjing, Jiangsu 210093, China
[ 5 ] [Yin, L.]Key Laboratory of Urban Security and Disaster Engineering of Ministry of Education, Beijing University of Technology, Beijing, 100124, China
[ 6 ] [Miao, C.]Key Laboratory of Urban Security and Disaster Engineering of Ministry of Education, Beijing University of Technology, Beijing, 100124, China
[ 7 ] [He, G.]Key Laboratory of Urban Security and Disaster Engineering of Ministry of Education, Beijing University of Technology, Beijing, 100124, China

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