Investigation of geological hazard body using electromagnetic computerized crosshcle tomography
Geological features such as fractures and voids pose potential hazards to the safe construction and operation of tunnels.The high resolution of electromagnetic computerized tomography has been successfully applied to the detection of such features prior to the construction of a railway tunnel through Qiyue Mountain in central China.We adopt a symmetrical dipole antenna to transmit electromagnetic waves in one borehole and a flagelliform antenna in another borehole as receiver and applied the algorithm SIRT to reconstruct the attenuation coefficient distribution between the boreholes.Combining the results with information from engineering drilling,we were able to deduce precisely the size,shape and spatial distribution of cavities,corrosion fragmentation and rock cranny zones among the five boreholes.The results show that electromagnetic CT is of particular superiority in detecting underground geological hazard bodies in carbonate rock area.
electromagnetic attenuation coefficient computerized tomography carbonate
Hanming Gu Xianhai Song Tie Liu Zongyong Tian
Institute of Geophysics & Geomatics,China University of Geosciences Wuhan,Wuhan 430074,China The Institute of the Fourth Exploration and Design of Railway,Wuhan 430035,China Institute of Geophysics & Geomatics,China University of Geosciences Wuhan,Wuhan 430074,China Yangtze
国际会议
The 3rd International Conference on Environmental and Engineering Geophysics(第三届环境与工程地球物理国际会议)
武汉
英文
97-100
2008-06-15（万方平台首次上网日期，不代表论文的发表时间）