Numerical simulation of the effect of coupling support of bolt-mesh-anchor in deep tunnel  

作　　者：SUN Xiao-ming CAI Feng YANG Jun CAO Wu-fu 

机构地区：[1]School of Mechanics and Civil Engineering, China University of Mining ＆ Technology, Beijing 100083, China [2]State Key Laboratory for Geomechanics and Deep Underground Engineering, Beijing 100083, China [3]Beijing Track-Traffic Construction Management Limited Company, Beijing 100037, China

出　　处：《Mining Science and Technology》2009年第3期352-357,共6页矿业科学技术（英文版）

基　　金：Projects 2006CB202200 supported by the National Basic Research Program of China;NCET07-0800 by the Program for New Century Excellent Talents in Universities

摘　　要：The mechanical effects of bolt-mesh-anchor coupling support in deep tunnels were studied by using a numerical method, based on deep tunnel coupling supporting techniques and non-linear deformation mechanical theory of rock mass at great depths.It is shown that the potential of a rigid bolt support can be efficiently activated through the coupling effect between a bolt-net support and the surrounding rock.It is found that the accumulated plastic energy in the surrounding rock can be sufficiently transformed by the coupling effect of a bolt-mesh-tray support.The strength of the surrounding rock mass can be mobilized to control the deforma-tion of the surrounding rock by a pre-stress and time-space effect of the anchor support.The high stress transformation effect can be realized by the mechanical coupling effect of the bolt-mesh-anchor support, whereby the force of the support and deformation of the surrounding rock tends to become uniform, leading to a sustained stability of the tunnel.The mechanical effects of bolt-mesh-anchor coupling support in deep tunnels were studied by using a numerical method, based on deep tunnel coupling supporting techniques and non-linear deformation mechanical theory of rock mass at great depths.It is shown that the potential of a rigid bolt support can be efficiently activated through the coupling effect between a bolt-net support and the surrounding rock.It is found that the accumulated plastic energy in the surrounding rock can be sufficiently transformed by the coupling effect of a bolt-mesh-tray support.The strength of the surrounding rock mass can be mobilized to control the deforma-tion of the surrounding rock by a pre-stress and time-space effect of the anchor support.The high stress transformation effect can be realized by the mechanical coupling effect of the bolt-mesh-anchor support, whereby the force of the support and deformation of the surrounding rock tends to become uniform, leading to a sustained stability of the tunnel.

关 键 词：mining engineering deep tunnel non-linear large deformation mechanics bolt-mesh-anchor support coupling support effect 

分 类 号：TD353.6[矿业工程—矿井建设] TU447[建筑科学—岩土工程]