Researches on detection of 3-D underground cave based on TEM technique |
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Authors: | G Q Xue Y J Yan J L Cheng |
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Institution: | (1) Key Laboratory of Mineral Resources, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, 100029, China;(2) Department of Engineering Mechanics, School of Mechanics, Civil and Architecture, Institute of Vibration Engineering, Northwestern Polytechnical University, Xi’an, 710072, People’s Republic of China;(3) State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology, Beijing, 100083, China; |
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Abstract: | Because of unreasonable coal mining in China, there are many unknown underground caves, and the inhabited environment of humans
is threatened by many geologic hazards, such as cracking of the buildings, ground subsidence, etc. To make the coal companies
aware of the harmfulness of these hazards, it is urgent to determine the reasons for the hazards. In this paper, transient
electromagnetic method (TEM) is used to detect the ground resistance caves, instead of the time-consuming and expensive direct
drilling survey. Numerical results of the 3-D synthetic model and real field survey data are given. The results showed that
the TEM method can be used to detect a complicated air-filled underground 3-D cave and coincide with the results of direct
drilling survey. |
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