Construction technology of TBM inclined shaft through bad formation
Aiming at the construction and support problems of the main and auxiliary inclined shafts in Kekegai Coal Mine,and based on the elastic-plastic deformation characteristics of surrounding rock and the support mechanism of anchor mesh shotcrete,FLAG finite element software is used to simulate the optimal support scheme and analyze the site monitoring data.The numerical simulation results show that with the increase of the length of anchor rod,the displacement of wellbore surface decreases at first,and then basically keeps unchanged.With the increase of bolt spacing,the deformation of surrounding rock in the wellbore remains basically unchanged at first,and then the surface displacement of surrounding rock increases obvi-ously.The field surrounding rock monitoring results show that the optimized support scheme effectively controls the deforma-tion of roadway surrounding rock,significantly improves the support effect,and has a practical guidance role for roadway open-styled TBM construction technology.
bad formationopen-type TBMsupport technologynumerical simulation
国家科技期刊平台
NSTL
万方数据
维普
